GroupDIY

Project Specific Discussions => Preamplifiers => Topic started by: gemini86 on October 23, 2011, 07:47:45 PM

Title: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: gemini86 on October 23, 2011, 07:47:45 PM
------READ ME!--------
The group buy is closed and PCB sets/brackets/faceplates are being shipped out asap, there are limited leftovers/extras. PLEASE PM OR EMAIL ME BEFORE SENDING ME MONEY. Unless you're just sending me free money, then do that.

So here's what I've been working on:

-Jakob's original G9 circuit
-Adapted for use in 51X format.
-Heaters run off -24 rail in series. (only drawback is the christmas light effect, one goes out, they both go out)
-Boost converter runs off +24V. Relays off the +16V rail, using individual dropping resistors which must be adjusted to your specific coil R.

Big thanks to Peter Purpose. He put a lot of work into his G9 rendition, and I took a couple ideas from him- using 1mm pin sockets as tube sockets and switching my converter IC to the mc34063, rather than an old fashioned 555 timer circuit. (HV controller is now the Maxim1771CPA+)

Also, big thanks to Jakob, of course, for designing the circuit to begin with. I've played around with guitar amp circuits for years, but I could never design such a simple, great performing mic premap.

Schematic attached-

--UPDATES--
Added LL5402 option on output.
Added CM-75101APC and LL1528 option to input.
Added boost converter input filtering
11/20/2012 - Schematic updated, converter controller IC change, layout tweaks.

---PRICES AND PAYPAL INFO---

- PCB sets are 18USD each, shipped in the USA.

- Metalwork and faceplate are 16 per set.
(0.125"/3mm white PCB board with black silkscreen)-no additional shipping if you're buying pcbs already.

If you're buying 4 or more boards, things start getting heavy, so maybe throw a couple extra bones in, if you can.
International guys (there are a lot of you, it seems) you are going to need to chip in a bit for shipping. Since it varies to widely, I would like to just set it at 4USD per package for up to 4 boards. This should cover everyone along with the likely medical bills I will incur after hours of filling out customs forms at the post office.

If you are ready to pre-order, please send payment to roddycluff AT hotmail DOT com and in the notes please include your forum name and how many you're ordering. Please include proper shipping as stated above, and if you're exchanging currency, please include an additional 3.5% for paypal fees.

Example: 2 PCB sets sent to germany - send 41.40USD. That's 36USD + 4USD for shipping + 3.5%
Example 2: 4 PCB sets sent to Kansas - send 72USD

You can send paypal to roddycluff AT hotmail DOT com ****PLEASE remember to add a note with your forum name****
Title: Re: G9 in 51X format
Post by: gemini86 on October 23, 2011, 07:56:48 PM
PCB artwork and overlay:

The gain switching is the original lorlin/alpha type that Jakob originally implemented. Ingenious. The phase and input switches are now on-on toggles.

HPF/low-cut is now on-off-on. Down is off, middle is high, up is low. Backwards, I know, but the only way to implement it in one toggle switch.

Input iron options:
OEP A262A3E, Lundahl LL1538, Cinemag CM-75101APC, EA2622, Jensen JT-110K-HPC, Jensen JT-115K-EPC (pin spacing is slightly different, may be made to fit *UNTESTED*)
Higher ratio Lundahls can also be used such as LL1576 (1:7), LL1578(1:10), which are the same pinout as LL1538
Output:
OEP A262A2E, Lundahl LL5402,

The boost converter is on it's own little board, which connects to the main pcb with SIL pins. The bottom of the converter has a copper ground plane, as does the top of the main pcb. Together they should provide a good amount of shielding (better than nothing). You could also hot-glue a small RF shield (like the ones your IC chips come in from mouser) to the main pcb between the two to add more shielding there. Some ferrite beads in the audio path would be a last resort, but I don't think it should be needed.

Artwork attached.

--UPDATES--

Added LL5402 option on output.
Added CM-75101APC and LL1528 option to input.
Added boost converter input filtering
Moved output pot- now 1.25" below gain switch, for more space between controls.
11/20/2012 - Update PCB file
Title: Re: G9 in 51X format
Post by: gemini86 on October 23, 2011, 08:06:25 PM
How it all fits together:

This was the big challenge, getting it all to fit, and making it simple to build, without a lot of hand wiring.

Here is a Google sketchup model, which is what aided me in the design: https://docs.google.com/leaf?id=0B6s_klsk9wMDYWM0YmQxNjgtODU5ZC00OGY4LWEyMDktNzNhMGM4OGU5MTM1&hl=en_US (https://docs.google.com/leaf?id=0B6s_klsk9wMDYWM0YmQxNjgtODU5ZC00OGY4LWEyMDktNzNhMGM4OGU5MTM1&hl=en_US)

Some things to note;
-The lorlin switch is over half an inch tall from pcb surface to mounting surface, and it's on the same control pcb as the input, hpf, and phase switches.
-The control board connects to the main board via a 12 pin header. The pins will go on the main board at a right angle, the header connector on the control board. This will likely need to be fine-tuned. I'm fairly confident that it should all line up as is, but not 100% certain until I make a prototype. (update: yes it works quite nicely)
Title: Re: G9 in 51X format
Post by: gemini86 on October 23, 2011, 09:33:25 PM
Anyway, I open the thread up for suggestions/comments. I'll be adding more transformer options soon.

So this is a feel, I guess. I'd like to do a group buy, if there's enough interest to send it out to be made.
Title: Re: G9 in 51X format
Post by: edanderson on October 24, 2011, 12:02:21 AM
consider putting an LC filter on the input of the mc34063 or you may be dirtying up the rail with HF trash.

if you could move the high voltage boost away from the input circuitry, that would probably be good.

i know you want to eliminate as much wiring as possible, but i would put in headers and just run the filament using a pair of wires if you are going to go straight from the -24 rail. 

i would not run the relays from a rail to ground -- better to go from rail to rail to avoid bouncing your ground with switching transients.

your gain and your output controls look a little close together.  try drawing in some knobs to get an idea of how much space you'll want.

ed
Title: Re: G9 in 51X format
Post by: gemini86 on October 24, 2011, 12:52:45 AM
Ed, thanks for your input.


i know you want to eliminate as much wiring as possible, but i would put in headers and just run the filament using a pair of wires if you are going to go straight from the -24 rail. 



I actually had already done that, forgot to mention it. The heaters terminate to 2 pads on the daughter board, then hand wire to a set of pads near the card edge.

i would not run the relays from a rail to ground -- better to go from rail to rail to avoid bouncing your ground with switching transients.

Well, unless you plan on clicking around while recording, I don't see the problem. Unless you think the pops induced into the ground rail could be loud enough to pop some speakers (like unplugging a hot phantom mic?).

consider putting an LC filter on the input of the mc34063 or you may be dirtying up the rail with HF trash.

if you could move the high voltage boost away from the input circuitry, that would probably be good.


Done and done, I'll revise the first posts with updated files.

your gain and your output controls look a little close together.  try drawing in some knobs to get an idea of how much space you'll want.


I'll do that and see what I come up with, kindof limited there too. I had planned on using 1" mxr type knob for the gain and 3/4" for the output.

Thanks again.

PS...spent literaly two days straight on this so far, and looks like all night tonight adding in alternative transformer options. Added CM-75101APC and LL1528 to input and LL5402 to output. That's 5 lbs of sh*t in a .5lb bag, people. ;)
Title: Re: G9 in 51X format
Post by: ruffrecords on October 25, 2011, 06:06:37 AM
Hi Rodney,

I am just creating a PCB footprint for the 1mm pins version of a B9A socket and I would just like to check I have not made any serious mistakes before committing to a PCB.

The holes for the pins are 75 mil diameter and I have used 100 mil diameter pads.

The pads are arranged at 36 degree intervals on a  468 mil diameter circle.

OK so far?

Cheers

Ian
Title: Re: G9 in 51X format
Post by: gemini86 on October 25, 2011, 10:25:20 PM
Ian,

Sorry, been a long day at work. I just used the stock 9pin footprint I had and changed the pads to fit this:
http://www.harwin.com/include/downloads/drawings/H3161.PDF

I use Kicad, otherwise I'd send you the module. Everyone else in the world seems to use eagle.
Title: Re: G9 in 51X format
Post by: bkbirge on October 25, 2011, 10:42:51 PM
Anyway, I open the thread up for suggestions/comments. I'll be adding more transformer options soon.

So this is a feel, I guess. I'd like to do a group buy, if there's enough interest to send it out to be made.

I could go for cinemag on the input. And count me in for 4 of these if the group buy happens.
Title: Re: G9 in 51X format
Post by: gemini86 on October 26, 2011, 12:02:59 AM
The PCB currently accepts CM-75101APC, EA2622, LL1528 or A262A3E on input.
Title: Re: G9 in 51X format
Post by: ruffrecords on October 26, 2011, 10:28:51 AM
Ian,

Sorry, been a long day at work. I just used the stock 9pin footprint I had and changed the pads to fit this:
http://www.harwin.com/include/downloads/drawings/H3161.PDF

I use Kicad, otherwise I'd send you the module. Everyone else in the world seems to use eagle.

Thanks for that Rodney. That's a different drawing to the one I have for the same part but yours is much more comprehensive. Their recommended mounting hole is 75 to 77 mil so I think I'll go with 76.

I have used Kicad in the past because I run Linux and wanted a free PCB layout package. In fact I liked it so much I started the yahoo group for it. That said, for my simple tube layouts I now use freePCB which, although a windows app, runs fine under Wine. Might be time to try Kicad again.

Cheers

Ian
Title: Re: G9 in 51X format
Post by: kepeb on October 26, 2011, 07:12:16 PM
looking good dude!
I think 2 of these would look nice in my rack
Title: Re: G9 in 51X format
Post by: gemini86 on October 27, 2011, 09:58:44 PM
I think 8 of them would look good in your rack...  ;D seriously though, are you in for 2? I'm trying to get pricing together. The setup cost will kill for the first batch. I'm trying to get the quantity up so they can be more affordable.
Title: Re: G9 in 51X format
Post by: kepeb on October 27, 2011, 10:52:04 PM
haha.
Well, Thats the case here too. Definite interest in this but I guess it depends how many others jump on.
Think I need some ballparks(cost and contents) to have a better idea.
On first impression it looks like it will be economic (only few parts and budget oeps) and a great excuse to have a couple G9s!

is it just boards you're planning or the metal too?
Title: Re: G9 in 51X format
Post by: gemini86 on October 27, 2011, 11:32:51 PM
I was just planning on boards. I can design an FPE file, but other than them, I don't know where to get fronts made in small quantities. The good news is that Jeff at classicapi has blank front plates with screw holes already in them. I could make a drill template you could print out and just drill away.

Price... well. It still depends on quantity, and I have to finalize some dimensions, etc., but it's looking like 18USD.

Not bad for the whole shebang.

Of course, all the documents I've posted are all you need to self-etch.
Title: Re: G9 in 51X format
Post by: kepeb on October 28, 2011, 08:03:26 AM
sounds good.
2 for me then :)

its awesome you put the etch file up, and the right time for this project.
looks a bit complex for my etching skills, would need to get some bigger clad and other stuff too so i think this is a good plan.
Title: Re: G9 in 51X format
Post by: Brolik on October 28, 2011, 10:29:19 AM
I'll take 2 as well at that price.
Title: Re: G9 in 51X format
Post by: gemini86 on October 29, 2011, 04:00:49 AM
So, that's 10 total (2 for myself) We need at least 5 more.

Anyone else?
Title: Re: G9 in 51X format
Post by: Niketouille on October 29, 2011, 05:59:26 AM
2 for me please.
Title: Re: G9 in 51X format
Post by: spase on October 29, 2011, 06:25:31 AM
2 for me :)
Title: Re: G9 in 51X format
Post by: jandoste on October 29, 2011, 06:53:43 AM
two for me please :)
thanks
Title: Re: G9 in 51X format
Post by: Mike D on October 29, 2011, 07:24:57 AM
I'd take two as well
Title: Re: G9 in 51X format
Post by: baadc0de on November 09, 2011, 08:11:53 AM
Still open? IF so, put me down for a pair thanks :)
Title: Re: G9 in 51X format
Post by: Hank Dussen on November 09, 2011, 08:38:06 AM
is there price set yet?
Title: Re: G9 in 51X format
Post by: kepeb on November 09, 2011, 09:19:02 AM
dude,
theres only 2 pages to look through.
Title: Re: G9 in 51X format
Post by: earl on November 09, 2011, 03:47:46 PM
interesting enough
2 here
Title: Re: G9 in 51X format
Post by: michal_k on November 09, 2011, 04:27:20 PM
I'll take one :)
Title: Re: G9 in 51X format
Post by: ericjazz on November 09, 2011, 04:31:41 PM
One for me, please !
Good job!
Eric
Title: Re: G9 in 51X format
Post by: Winetree on November 09, 2011, 08:26:56 PM
I'll take four.
Title: Re: G9 in 51X format
Post by: gemini86 on November 09, 2011, 08:54:15 PM
the list is growing!

I'm finalizing the PCB design hopefully by next week's end, and then I'll be sending off for the boards. I'll post updates as they come.
is there price set yet?


the price is not set in stone, as I'm still getting the numbers together. At this point, assuming nobody drops out, it won't be higher than 18USD.
Title: Re: G9 in 51X format
Post by: pacemaker on November 10, 2011, 03:27:36 AM
amazing project,
two for me for !!
regards,
Francois
Title: Re: G9 in 51X format
Post by: Albrebreton on November 18, 2011, 03:55:10 PM
Looks Great. Put me down for a pair.
Thanks
Title: Re: G9 in 51X format
Post by: spase on November 18, 2011, 10:54:43 PM
you can put those edcor footprints on this :)
Title: Re: G9 in 51X format
Post by: gemini86 on November 18, 2011, 11:15:20 PM
hmmm...

I already had to sub out the LL1528 for 1538, so no dual secondaries. (not used in the g9, so I don't know why the 1538 wasn't used in the first place) I'll take a look and see... The edcors offer minimal shielding (copper tape around the bobbin only, no can) so noise getting into the input (especially with high gain) may be a problem.

OEPs are cheaper anyway... you can get an a262a3e with a shielding can for 24USD, edcor mx5CS is about 26USD, and you have to wait 2 weeks before they ship it...

anybody else need to have edcor footprints?
Title: Re: [GROUP BUY] G9 in 51X format
Post by: JamesW on November 20, 2011, 06:37:37 PM
One Pair Please
Title: Re: [GROUP BUY] G9 in 51X format
Post by: benlindell on November 20, 2011, 07:19:18 PM
2 here please
Title: Re: [GROUP BUY] G9 in 51X format
Post by: wowi on November 21, 2011, 08:05:52 AM
I am in for 1 pair

Wolfgang
Title: Re: [GROUP BUY] G9 in 51X format
Post by: okgb on November 21, 2011, 09:10:42 AM
I usually think in pairs but have too much to finish , so I'll commit to at least 1 to help the effort
Title: Re: [GROUP BUY] G9 in 51X format
Post by: Brolik on November 21, 2011, 11:04:02 AM
I'll take two.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: bruno2000 on November 21, 2011, 12:19:41 PM
I'd like 2 as well.
Best,
Bruno2000
Title: Re: [GROUP BUY] G9 in 51X format
Post by: zayance on November 21, 2011, 12:25:53 PM
+2 here
Title: Re: [GROUP BUY] G9 in 51X format
Post by: funkymonksf on November 21, 2011, 12:29:50 PM
2 please
Title: Re: [GROUP BUY] G9 in 51X format
Post by: 1sound on November 22, 2011, 01:44:33 AM
Four for me please...

Geez... now to find time to build all this stuff I've accumulated ;)
Title: Re: [GROUP BUY] G9 in 51X format
Post by: baadc0de on November 22, 2011, 01:48:12 AM
Four for me please...

Geez... now to find time to build all this stuff I've accumulated ;)

It only gets worse!
Title: Re: [GROUP BUY] G9 in 51X format
Post by: barney on November 23, 2011, 06:56:19 AM
Put me down for a pair please. Thanks.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: kramerb1 on November 23, 2011, 12:05:29 PM
2 for me, please. I don't have the 51X rack yet, but I know that I'll get around to it. Might as well get started acquiring the fillings.

I'm in Eugene too! Relatively new to DIY. We should meet up some time and talk shop.

Brian
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 23, 2011, 12:57:12 PM
For sure,  Brian! I don't have any nerd friends to bend circuits with. (Do know a couple of gear slutz though)
Title: Re: [GROUP BUY] G9 in 51X format
Post by: spase on December 03, 2011, 06:35:36 AM
any news about this? cant wait :)
Title: Re: [GROUP BUY] G9 in 51X format
Post by: spyder_hobo on December 03, 2011, 11:46:42 AM
+1

Just finished my 51x last night better start filling her up!
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on December 03, 2011, 12:29:49 PM
Still finalizing the layout, testing, etc... right now I'm trying to get the 9K2 boards out, so I'm spread a bit thin.

Keep a watch here, when there's news, i'll update.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: sirzodiac on December 21, 2011, 07:58:02 AM
i'd take 2 as well!
thx
Title: Re: [GROUP BUY] G9 in 51X format
Post by: pacemaker on December 22, 2011, 03:18:29 AM
mmm,
i will take 2 ...
very nice project !!
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on December 22, 2011, 10:27:11 AM
mmm,
i will take 2 ...
very nice project !!

Sir, I already have you down for two.

Do you want two more, or are you just reaffirming your previous interest? ;)
Title: Re: G9 in 51X format
Post by: mikeyB on December 23, 2011, 08:24:04 PM
How it all fits together:

This was the big challenge, getting it all to fit, and making it simple to build, without a lot of hand wiring.

Here is a Google sketchup model, which is what aided me in the design: https://docs.google.com/leaf?id=0B6s_klsk9wMDYWM0YmQxNjgtODU5ZC00OGY4LWEyMDktNzNhMGM4OGU5MTM1&hl=en_US (https://docs.google.com/leaf?id=0B6s_klsk9wMDYWM0YmQxNjgtODU5ZC00OGY4LWEyMDktNzNhMGM4OGU5MTM1&hl=en_US)

Some things to note;
-The lorlin switch is over half an inch tall from pcb surface to mounting surface, and it's on the same control pcb as the input, hpf, and phase switches. They are not half and inch tall, so I countersunk the switch holes so the rockers don't hit the face plate. 
-The control board connects to the main board via a 12 pin header. The pins will go on the main board at a right angle, the header connector on the control board. This will likely need to be fine-tuned. I'm fairly confident that it should all line up as is, but not 100% certain until I make a prototype.

I can,t view this sketchup - tried on 2 macs - is it pc specific?
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on December 23, 2011, 09:38:31 PM
It shouldn't be, but I don't own a mac that can handle sketchup, so I don't know. Anyone else?

BTW; the files I've uploaded so far are not tested, so they are not verified and may change. I would wait until I've been able to build the prototype until using these files, as they may, and probably will change. Once the holidays are over I'll be back on this project.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: baadc0de on December 24, 2011, 02:06:39 AM
Could the output capacitor be 4.7uF / 125V?
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on December 24, 2011, 01:02:44 PM
I wouldn't, I think the peak output swing will be higher than that.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: Kevin on January 16, 2012, 10:37:22 AM
2 for me please
Title: Re: [GROUP BUY] G9 in 51X format
Post by: dmp on January 16, 2012, 11:21:24 AM
2 for me please
Thanks
Title: Re: [GROUP BUY] G9 in 51X format
Post by: wowi on January 16, 2012, 11:25:42 AM
And two for me please

Wolfgang
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on January 16, 2012, 12:33:24 PM
I'll add you guys to the list.

Update: mr zayance is working on prototype pcbs for me, and has also helped a ton in spotting potential problems for home etchers. Many thanks to him. In the coming weeks i'll be prototyping and making any needed adjustments before manufacturing.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: dmp on January 16, 2012, 12:59:53 PM
Are the capacitor footprints sized for Wimas? Particularly the hi voltage 4.7uf, 1.5uf
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on January 16, 2012, 01:08:07 PM
Yes
Title: Re: [GROUP BUY] G9 in 51X format
Post by: deuc224 on January 16, 2012, 06:13:43 PM
I want in for 2
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on January 16, 2012, 10:05:15 PM
I want in for 2

I already have you down for 2, is that correct?
Title: Re: [GROUP BUY] G9 in 51X format
Post by: deuc224 on January 17, 2012, 04:14:10 PM
yes 2 is correct
Title: Re: [GROUP BUY] G9 in 51X format
Post by: 1sound on January 18, 2012, 04:19:22 AM
Count me in for 4 please.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on January 19, 2012, 03:22:46 AM
already have you down for 4...
Title: Re: [GROUP BUY] G9 in 51X format
Post by: mitsos on January 19, 2012, 11:47:26 AM
I thoght I missed this. I'm in for 1 maybe 2 if not too late. Is price still 18?
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on January 19, 2012, 12:09:52 PM
Not too late. I'll put you down for 1 for now, i'll be ordering extras.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: mitsos on January 19, 2012, 12:48:08 PM
thanks. what's ETA more or less?
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on January 19, 2012, 12:53:08 PM
Prototype pcbs are on the way from zayance's house to mine. Parts on the way from everywhere else, then the madness begins. Once a successful prototype is put through it's paces i'll know more. I don't want to shout out an eta because it will only jinx it and cause delays. That's a scientific fact with proven data to back it up...
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on February 28, 2012, 05:24:36 PM
Just a quick update, prototype is a success, although I'm not getting the efficiency if hoped for out of the hv converter. It may have to do with layout or just parts selection but similar circuits have been proven to run at around 86% efficiency, where mine is about 73%.

Given that most 51x racks aren't going to be loaded up with both 16v and 24v modules all running at max draw, this efficiency problem might not even be a problem, what do you guys think?
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on February 29, 2012, 07:48:01 PM
I could use some feedback if anyone has any.

Also, I'm considering designing a front panel "pcb" much like igors designs have used, 8th inch fr4 with holes drilled and silkscreen. What it's three interest there? Three manufacturer has already told me that they can do finish quality silkscreen. I was thinking black on white, but maybe that's just my taste...
Title: Re: [GROUP BUY] G9 in 51X format
Post by: bkbirge on March 02, 2012, 12:20:41 PM
Sounds great Gemini, I like the idea of an "Igor style" kit with the mounting hardware and front panel, is that what you meant? Black on white would look good too. As far as the efficiency it might be worth looking at further. I'm probably not the only one that was planning on loading several of these suckers up in the rack.  Looking forward to when we can order these and it's great news that your proto is working.

I could use some feedback if anyone has any.

Also, I'm considering designing a front panel "pcb" much like igors designs have used, 8th inch fr4 with holes drilled and silkscreen. What it's three interest there? Three manufacturer has already told me that they can do finish quality silkscreen. I was thinking black on white, but maybe that's just my taste...
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on March 02, 2012, 01:31:44 PM
Well I had thought about a full pcb and metalwork kit, but this would be a lot of work(time), and also take quite a bit of investment(money), and I'm not sure there needs to be another kit guy on the block. With Jeff's blank bracket, it would be very easy to drill the front using a template and a hand drill.

I'm going to try another layout with the converter design I currently have, if the results aren't what they need to be, I'm going to go with a flyback converter.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: dmp on March 02, 2012, 01:59:04 PM
I'd probably drill and label a front panel myself in DIY fashion... so just pcbs for me.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: Kurtsa on March 20, 2012, 03:41:51 AM
Hi Rodney and all others,

Any new news about the project? I'm in for 2pcs if it is not too late...

_
Kurtsa
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on March 21, 2012, 01:43:36 PM
No news yet.

I've got another project on the bench that I have to get out the door ASAP, but I'm waiting for parts again...I'll try to do some work today to assess the situation with the HV converter.

BTW; does anyone know where to get 10:1 switching transformers, off the shelf? If I need to go the flyback route, I'll need to find a source for this, so I figured start looking now, just in case.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on April 21, 2012, 04:17:02 PM
Quick update on progress:

Having problems with the boost converter right now. My previous design worked, but did not have the needed efficiency due to poor layout and a controller that just wasn't up to the task, so I've built a new design using a more modern converter and a better layout, but I'm currently trying to get it running, skip over to the lab to read up and provide input if you can.

http://www.groupdiy.com/index.php?topic=48455.0 (http://www.groupdiy.com/index.php?topic=48455.0)

Once this is sorted out, production will commence, I will do a final count to see who is still interested after such a long wait.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: mylesgm on April 22, 2012, 09:41:56 AM
I'll be in for 1 or 2. 
Title: Re: [GROUP BUY] G9 in 51X format
Post by: dogma on May 02, 2012, 05:46:49 PM
I'm in for two please.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: speakerface on May 03, 2012, 11:35:33 AM
I would like 2 as well.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on May 03, 2012, 11:37:42 AM
Added you guys to the list. will post an update soon.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: mitsos on May 03, 2012, 12:02:19 PM
still in for a couple PCBs here. Is gain switch lorlin type?

Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on May 03, 2012, 12:06:34 PM
still in for a couple PCBs here. Is gain switch lorlin type?
Yes
Title: Re: [GROUP BUY] G9 in 51X format
Post by: mitsos on May 03, 2012, 03:25:25 PM
cool, can't wait. gonna get me some valves while I'm waiting, already got the trafos.

As for metalwork, I'm fine with some type of drill template/distances, no actual metal for me.

Thanks for sticking through with this thng!
Title: Re: [GROUP BUY] G9 in 51X format
Post by: okgb on May 05, 2012, 08:55:38 AM
If it helped , I could up my order from 1 to 2

Current draw wise as more 24v projects come online looks my 51 x rack will take those modules
and my normal 500 rack will take the 16v things probably will run off of separate supplies
but that is a possibility
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on May 05, 2012, 04:47:58 PM
Well I've got the current draw down to around 150mA, but it can get a little higher. Not sure my HV converter can get much more efficient without spending a lot more time/money which will ultimately delay the project and drive the price up to recoup r&d costs. I did just get a decent oscilloscope finally, so I'm able to see what's going on in the converter. Right now I'm turning focus on the preamp itself and I'm working on getting it fully functional and doing some in depth testing.

Now off to mow the lawn before it starts raining...oh Oregon.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: mitsos on May 09, 2012, 01:03:11 PM
cant'wait man, excited about this. 

is your DC-DC usable for other designs as well? I think I saw you mention that you made it as a plug in PCB.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on May 09, 2012, 01:44:50 PM
Yes, the converter is separated from the main pcb, my intention was to make it an independent module that can be used in other designs. It should be able to output over 30mA with a couple component changes.

Right now i'm still debugging the preamp, having to track down lots of solder bridges, due to the lack of a solder mask on the prototype pcb. (also my soldering could be better) will keep this thread updated.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: mulletchuck on May 21, 2012, 10:09:07 PM
any updates on this? 
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on May 21, 2012, 10:51:26 PM
At the moment the preamp is working, but the converter is still giving me fits. I'm waiting for parts at the moment. Thanks for hanging with me.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: chris1986 on June 07, 2012, 02:02:01 PM
Count me in for 2 of these! Would be interested in faceplates too if you go down that road...
Thanks
Title: Re: [GROUP BUY] G9 in 51X format
Post by: Pliplo on July 06, 2012, 10:41:57 PM
Am i late to this ball? Im in for a pair
Title: Re: [GROUP BUY] G9 in 51X format
Post by: mulletchuck on July 11, 2012, 07:01:33 PM
updates???
Title: Re: [GROUP BUY] G9 in 51X format
Post by: freestylemovement on September 11, 2012, 05:05:57 AM
would definitely love 2-4 when it is ready.  any word on when that might be?

thank you
Title: Re: [GROUP BUY] G9 in 51X format
Post by: bkbirge on September 11, 2012, 03:14:05 PM
Any news or updates with your HV converter issues?
Title: Re: [GROUP BUY] G9 in 51X format
Post by: tonycamp on November 16, 2012, 09:20:03 PM
did this project die? I would be in for 1
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 17, 2012, 01:23:44 PM
So first off, I think apologies are in order. Life has caught up to me as of late, looking for a new job, my mother in law was hospitalized a few months ago and is now just recovering. With the time my wife had to take off work, combined with some unexpected veterinarian and auto repair bills, my savings has been cleaned out, along with most of my credit line. The project had to be shelved for a while, since hobbies were the last item on my budget. Either way, I should have made time to give updates. I'm really sorry to keep you guys hanging.

Enough of that.

The good news! Things have calmed down around here and I've been able to get cracking again. After a few failures with the HV converter, I finally got smart and contacted Maxim IC for help. They were very friendly and quick to respond to multiple questions and I was able to get a better understanding of the 1771 controller chip. I've finally got a working converter that's stable and relatively clean. Any noise on the rail is at 100Khz, and can easily be tamed with an additional LC filter. Right now I'm testing out the amp itself, correcting bugs, and making final revisions to the PCB files.

As of right now, I'm still hoping to make a PCB order once everything is finalized. I'll post back once I've confirmed everything is ready to go.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: okgb on November 17, 2012, 04:34:49 PM
Sorry to hear about all the life , at the very least I'll buy a pair just to get money flowing to you ,
you should make something for your efforts ,  and as a pre-order not be out the initial cost .
Title: Re: [GROUP BUY] G9 in 51X format
Post by: baadc0de on November 17, 2012, 05:32:24 PM
Oh well, that stinks... but yeah, I'm still in for two!
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 20, 2012, 11:00:47 PM
Testing has gone well, making some final changes and triple checking the layout for any minor mistakes. I'll post some sound samples later, this thing is pretty clean. After swapping out a couple sets of used RCA 12au7's, I found a pair that are pretty quiet and not too microphonic. I now see why this preamp is a go-to workhorse.

Anyway, here's the big list. I'll send out a mass PM to get a final head count. Please PM or reply here if you need to change or remove your order.

bkbirge - 4
deuc224 - 2
kepeb - 2
Niketouille - 2
spase - 2
jandoste - 2
Mike D - 2
baadc0de - 2
earl - 2
michal_k - 1
ericjazz - 1
winetree - 4
pacemaker - 2
Albrebreton - 2
JamesW - 2
benlindell - 2
wowi - 2
okgb - 2
Brolik - 2
bruno2000 - 2
zayance - 2
funkymonksf - 2
1sound - 4
barney - 2
kramerb1 - 2
sirzodiac - 2
Kevin - 2
dmp - 2
mitsos - 1(2?)
Kurtsa - 2
tonycamp - 1
freestylemovement - 2 (4?)
Pliplo - 2
chris1986 - 2
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 21, 2012, 12:11:26 AM
OH...price. 18USD each, shipped in the USA. If you're buying 4 or more boards, things start getting heavy, so maybe throw a couple extra bones in, if you can.
International guys (there are a lot of you, it seems) you are going to need to chip in a bit for shipping. Since it varies to widely, I would like to just set it at 4USD per package for up to 4 boards. This should cover everyone along with the likely medical bills I will incur after hours of filling out customs forms at the post office.

If you are ready to pre-order, please send payment to my registered email address (check my profile) and in the notes please include your forum name and how many you're ordering. Please include proper shipping as stated above, and if you're exchanging currency, please include an additional 3.5% for paypal fees.

Example: 2 PCB sets sent to germany - send 41.40USD. That's 36USD + 4USD for shipping + 3.5%
Example 2: 4 PCB sets sent to Kansas - send 72USD

That's all folks.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: mulletchuck on November 21, 2012, 02:28:02 AM
can we see some pics of the assembled unit??    what about faceplates?
Title: Re: [GROUP BUY] G9 in 51X format
Post by: tonycamp on November 21, 2012, 02:55:28 AM
very cool, i say again, can we get some pics up in heya!
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 21, 2012, 02:37:04 PM
I'll try to get pics up before I skip town for the holiday.

For those of you who have been asking, my email is roddycluff A_T hotmail...

Some have been asking about metal work. I hadn't planned on taking up the task of producing (or having a shop produce) metal kits, but I imagine it would be quite expensive, given the small quantity. Also, shipping becomes more expensive, etc. I'd be glad to design a drill template/FPE layout so you can order from shaffer or FPE, but I myself had planned on using Jeff's blank bracket and face plate from classicAPI. It may be worth looking into if there's enough interest, but so far it seems only a small handful would require the metal be done professionally.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: bkbirge on November 21, 2012, 07:47:48 PM
paid for 6, forgot to put my username but it's the same on paypal as here

as far as faceplates go I'd be into them, or at least an FPE template to order from. I don't have a drill press so blank plates would look pretty ghetto if I drilled them
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 22, 2012, 12:12:42 AM
You're all good to go, bkbirge. Thank you!

Some pics: Please note, prototyping sometimes isn't pretty, these boards have been work beyond anything I thought they could handle.

Credit goes to Zayance for his handywork, he did the copper etching for me, since my setup wasn't up to the task.

(https://lh3.googleusercontent.com/-GVzO2rAMZ-4/UK2xM1j2ROI/AAAAAAAAAic/W0dMad1v3Lc/s640/%255BUNSET%255D.jpg)

(https://lh6.googleusercontent.com/-1Kfu3QJ3MsE/UK2xL67Z8QI/AAAAAAAAAiE/bu0X1Aq2kmw/s640/%255BUNSET%255D.jpg)

(https://lh4.googleusercontent.com/-G1nlR0QNph8/UK2xKy9nWvI/AAAAAAAAAiY/u2Isvb18a0M/s640/%255BUNSET%255D.jpg)

Note that the layout and lead spacing for all the poly caps is meant for WIMAs, but I had already ordered these for another build, so in they went.

I'm still getting a bit more hiss than I'd like, so I need to disassemble and clean the boards really well, now that the soldering iron has been unplugged. After this weekend, I will do that and try to get up some good audio clips.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 22, 2012, 01:23:55 AM
A quick audio sample to (hopefully) tide you over until I have cleaned up my workspace. There is way too much room noise in here to do a good mic recording, my sm57 is a dirty stage slut and I haven't hooked up phantom power to me test rig.

(excuses, excuses...)

Anyway here's a crappy audio clip of my even crappier guitar playing. (http://soundcloud.com/gemini86-1/g9-51x-audio-test-instrument)
Title: Re: [GROUP BUY] G9 in 51X format
Post by: tonycamp on November 22, 2012, 02:23:28 AM
looking good Rodney, ill be in for 2, instead of the 1 I listed earlier in the thread. I'll try to get my payment in early next week :)
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 22, 2012, 09:19:27 AM
Sounds good, Tony.

Alright, happy thanksgiving everyone! I'll be out for the rest of the weekend, probably be back at it on Sunday.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: okgb on November 22, 2012, 10:06:04 AM
Really nice work ! i'm sure the Roll's guy will be jealous when he see's this , there aren't many
500 tube modules  , I'll take two to support the cause [ and not be left behind ]

ANY metal work or parts AND face plates , always helps to insure successful completion on my part
stuff sits around when I can't co-ordinate ordering , thanks in advance .
Title: Re: [GROUP BUY] G9 in 51X format
Post by: baadc0de on November 22, 2012, 04:37:12 PM
Pre-paid. Looking forward to the PCBs!!
Title: Re: [GROUP BUY] G9 in 51X format
Post by: Albrebreton on November 23, 2012, 04:08:47 AM
Looks great, Rodney, I would like to confirm the two units, but I can't see your registered email address (in your my profile) to make the payment  :-[. Can you send it?.
Thanks for all your work and best regards.
Alberto
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 23, 2012, 06:50:42 PM
My email is roddycluff A_T hotmail DOT com...
Title: Re: [GROUP BUY] G9 in 51X format
Post by: jandoste on November 23, 2012, 07:06:05 PM
paypal!ed :)
Thanks!
Title: Re: [GROUP BUY] G9 in 51X format
Post by: Albrebreton on November 24, 2012, 03:35:14 AM
Payment done.
Thanks and kind regards.
Alberto
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 25, 2012, 06:55:49 PM
Thanks to everyone who's paid so far. We're only a little more than half way through the list, it is a holiday weekend, afterall. Many of us have been away or spending time with family. We'll see how the next few days go, but I think I'll wait until next monday to order, and send out reminders to those that have not confirmed.

I've been spending all weekend (since friday morning actually) replacing the rotten fence on one side of my lot. It's been a muddy, rainy mess, so it's taken almost all my free time (and 5 people working on it). So hopefully I'll be able to get to metal work sometime this week. I did a simple FPD layout, which I've attached to this post. The drill locations are accurate, as best I can tell, but it IS NOT CONFIRMED. So please, maybe wait until I have time to make a prototype.

****The attached FPD file has been renamed to .PFD to allow attachment, please rename it to .FPD to open in Front Panel Designer.*****

[UPDATED FPD FILE TO REV 1.1]
Title: Re: [GROUP BUY] G9 in 51X format
Post by: tonycamp on November 25, 2012, 07:41:11 PM
Dig it Rodney, you should make the 51X, look like 5lX, so it will look like     GlX        5lX     :o? lose the little nubbin on the 1....tricky i say;)

sweet!
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 25, 2012, 09:00:19 PM
I've been calling it the "gix fix".
Title: Re: [GROUP BUY] G9 in 51X format
Post by: okgb on November 26, 2012, 11:36:29 AM
What is the footprint for the input transformer ?  can it take any options ?
I ask because I wonder why the original  wasn't made with a 1:10 type

I the footprint takes the Cinemag Jensen style that should provide options , thanks
note too that the pinout for the Lundhal 1528 , is different than the 1538  [ which I believe
is electrically the same AND more common . ]

and is something I'd try myself . thanks for the fpd template
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 26, 2012, 11:42:58 AM
I posted the input and output options somewhere toward the beginning of this thread, if i remember right. The oep could be wired for 1:13 with some trace cutting and jumping. Not sure about the cinemag or the lundahl.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: Marc Duchesne on November 26, 2012, 11:50:00 AM
2 also for me...
Thanks !
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 26, 2012, 09:42:08 PM

note too that the pinout for the Lundhal 1528 , is different than the 1538  [ which I believe
is electrically the same AND more common . ]



I originally designed the layout with the 1528, but then switched to the 1538 because the pinout difference made the layout less complicated. For this application, I don't see the need for dual secondaries. Also note that by using the LL1538 footprint, the LL1576 (1+1:7) and LL1578 (1+1:10) can be used without modification.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: okgb on November 26, 2012, 11:51:45 PM
 Good move , I think the 1538xl's Rock for a 1:5 type , except they seem to be pricey , thanks
[ better shielding and extra low end handling I believe ]
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 27, 2012, 01:15:08 AM
I don't think there's room enough for the XL, but the regular 1538 footprint fits nicely. You only gain 3dB additional input headroom (with the XL version), so I don't think the price jump is worth it.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: Winetree on November 27, 2012, 01:36:45 AM
Paid for 4
Title: Re: [GROUP BUY] G9 in 51X format
Post by: bkbirge on November 27, 2012, 09:30:14 AM
Is there a BOM in the works? Or am I asking too soon?
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on November 27, 2012, 12:07:17 PM
That's on my list of things to do. I have a rough list, but i want to get a very organized bom with part numbers for the critical items going. This week for sure.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: tonycamp on November 28, 2012, 02:03:37 AM
I'll be paying tmmrw afternoon for 2 Rodney, thanx

T

Paid for 2, thanks Rodney...excited for this :)
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on December 01, 2012, 04:43:13 PM
Just a quick update:

I've been refining the fit of the PCBs to the L-bracket (after trying to do some metal work and finding some small dimensional discrepancies). I drew up a pretty rough CAD drawing of a finished L bracket and sent it to a local metal fabricator here in my city. Waiting on a quote from them.

Also cleaning up/organizing the BOM, thanks for your patience, guys!

PS - To everyone who wants a face-plate/metalwork kit:

What do you think about the faceplate styling??? If we can all agree on the design, I can order the whole lot from FPE and get a discount. If we order 10 pieces, the price drops from 31.35 each to 25.08 each, and I can ship them out with the PCBs to consolidate shipping.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: Winetree on December 01, 2012, 08:47:07 PM
Can't view the faceplate artwork, but I'd be in for4 metal kits.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on December 01, 2012, 08:56:23 PM
It's an FPD file, you have to rename it and open with Front Panel Designer.

But here's a screen cap. of the panel.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: okgb on December 02, 2012, 12:33:17 AM
 A basic design is fine  [ for me  ] on the face plate , but 25.00 still sounds pricey , unless
it costs more for me to order only two by myself , thanks for putting in the time !
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on December 02, 2012, 12:50:43 AM
Here's the price breakdown:
Title: Re: [GROUP BUY] G9 in 51X format
Post by: bruce0 on December 02, 2012, 01:43:35 AM
This looks like a wonderful project.

Please put me down for 4 PCB sets.  I can't find your email (not visible in profile), could you send it and I will paypal you the money.

If you establish a price for the front panels I am in for 2 front panels.

If you get a price for metal work, I would go for it too probably.

Thanks for doing all the work here!

Bruce
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 02, 2012, 01:51:05 AM
I posted before, but things are getting buried. It's roddycluff AT hotmail DOT com. I've modified the first post with price info.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: bruce0 on December 02, 2012, 02:32:08 AM
ok, set payment for 4 sets of PCB's.  Let us know when you have prices for Front Panel and/or metal.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: [silent:arts] on December 02, 2012, 03:46:05 AM
Paid for 2 PCB sets  8)
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: Mike D on December 02, 2012, 06:21:46 AM
Just paid for 2, thanks a lot
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: tonycamp on December 03, 2012, 02:06:30 PM
Hi Rodney, quick Q, any idea of total build cost on this? I'm trying to figure out how much $ i've been blindly committing to lately ;D
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: mulletchuck on December 03, 2012, 02:08:17 PM
Did I spy some SMD components on the HV converter??
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 03, 2012, 03:10:51 PM
Yes, one soic 8, a diode an inductor and a resistor. All really easy to solder by hand. This was the only way to get it all to fit.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: wolan42 on December 03, 2012, 04:09:52 PM
Hello Rodney,

paypal send for 2 boards.

Thanx

Andreas
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: Graph on December 03, 2012, 04:49:35 PM
Just paid for one + shipping :)

It would be amazing to use the converter for other diy projects, like a pultec, i think it would be much easier. Let us know about frontpanel.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: mulletchuck on December 03, 2012, 06:09:34 PM
It would be amazing to use the converter for other diy projects, like a pultec, i think it would be much easier. Let us know about frontpanel.

how about an LA2A-51X, since Ruckus328 never finished his...
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: Graph on December 03, 2012, 08:31:12 PM
It would be amazing to use the converter for other diy projects, like a pultec, i think it would be much easier. Let us know about frontpanel.

how about an LA2A-51X, since Ruckus328 never finished his...
That would be great too.

One question, how much current does this build use or needs? Will it have enought current for a standart 51x build from the PSU?
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 03, 2012, 10:18:41 PM
It would be amazing to use the converter for other diy projects, like a pultec, i think it would be much easier. Let us know about frontpanel.

how about an LA2A-51X, since Ruckus328 never finished his...
That would be great too.

One question, how much current does this build use or needs? Will it have enought current for a standart 51x build from the PSU?

I thought ruckus was still working on his? He was talking about developing a flyback converter design, which is a bit more complicated. I had thought about using that topology, but for a two bottle preamp, really not needed. If you have the time and cash to spend on R&D, a simple boost converter can be over 90% efficient.

I made the HV converter a separate board for three reasons. 1- shielding from signal lines on the bottom layer of the main board. There's a copper ground plane between the converter and the signals on the bottom of the board. 2- repair-ability. You can stick the HV converter board onto a hot plate and remove/replace the SMD devices if needed. If it were integral to the main board, this would not be possible. 3- I wanted it to be a separate module, which could be swapped out with an upgraded version should one come around. After this project rolls out, I'll be working on a new converter that will be more stable/efficient with higher output capacity. The tech guy at Maxim IC has given me a good starting point, but it will take more time, more money and, oh, also lots of time.

The converter I have, as tested, uses max 140mA on the +24V rail. The tubes use the -24V rail @ 150mA (this is the maximum for that rail/per rack space) and the relays operate on +16V rail. There are only 2 so that rail is loaded light, and the -16V rail is unused. (there's also the +48v rail, running through standard 6k81 resistors for phantom)

One thing to consider with all these 500 modules is that everything has to fit perfectly in order for it to go into a rack! SO much time is used up just making sure everything is lining up, making adjustments, checking datasheets for front switches, connectors, etc. Waiting for stuff to come from mouser is torture.

PS I've not yet heard from the fabrication house about the brackets...
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: DomiStenz on December 04, 2012, 12:49:17 AM
I payed for two   ;)
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: mulletchuck on December 04, 2012, 03:27:27 AM
sorry for the tangent;  ruckus never finished it. however, he did post about an 1176A/D clone he'll be releasing in january in his build thread.  that's probably why he never finished the LA2A-51X.   Gemini, we need you to take over!!!  lolol :-D
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: Marc Duchesne on December 04, 2012, 09:49:26 AM
Money sent for my 2 G9 boards...
Please confirm reception.

Thanks a lot for this !!!
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 04, 2012, 11:59:50 AM
sorry for the tangent;  ruckus never finished it. however, he did post about an 1176A/D clone he'll be releasing in january in his build thread.  that's probably why he never finished the LA2A-51X.   Gemini, we need you to take over!!!  lolol :-D

I bet he'll get back to it and have it finished before i could even get a working prototype built. It's his baby, give him time. I have some other tube projects in store for you guys.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: bkbirge on December 04, 2012, 12:13:36 PM
PS - To everyone who wants a face-plate/metalwork kit:

What do you think about the faceplate styling??? If we can all agree on the design, I can order the whole lot from FPE and get a discount. If we order 10 pieces, the price drops from 31.35 each to 25.08 each, and I can ship them out with the PCBs to consolidate shipping.

Mark me down for 6 of 'em. I think you'll have no problem getting to the batch size discount.
Title: Re: [GROUP BUY] G9 in 51X format
Post by: gemini86 on December 04, 2012, 12:44:54 PM
PS - To everyone who wants a face-plate/metalwork kit:

What do you think about the faceplate styling??? If we can all agree on the design, I can order the whole lot from FPE and get a discount. If we order 10 pieces, the price drops from 31.35 each to 25.08 each, and I can ship them out with the PCBs to consolidate shipping.

Mark me down for 6 of 'em. I think you'll have no problem getting to the batch size discount.

I've been working out trying to get them cheaper. Chae gave me a quote for laser marked panels, now I'm trying to figure out drilling. (hint hint, chae) They will probably be much cheaper and look better.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: speakerface on December 04, 2012, 05:29:31 PM
Just sent payment for 2.  Also interested in front panel (basic design is good with me) as well as L-bracket, etc.  Thanks much. 
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 04, 2012, 09:01:57 PM
Hi Rodney, quick Q, any idea of total build cost on this? I'm trying to figure out how much $ i've been blindly committing to lately ;D

Sorry, somehow missed this Q...

I'll figure that out when I get the BOM together, i'll likely be ordering components for a full build so I can take pics for a build thread. If I remember correctly (and it's hard to say, since I had ordered a couple wrong parts/missed some things etc.) small components and switches, etc from mouser were like 30 bucks. Then it's up to your tube and transformer selection.

Money sent for my 2 G9 boards...
Please confirm reception.

Thanks a lot for this !!!

Got your payment, thanks!
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 04, 2012, 09:42:45 PM
You know, after looking through all these options, I'm beginning to thing that PCB front panels makes the most sense here.

.125" thick fr4, copper 1oz copper on both sides for shielding, silkscreened markings. I can get them for less than 10 bucks each, depending on quantity. The manufacturer has assured me that the silkscreen quality will be top notch (they've done a good job before).

What do we think?

Still working on brackets.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: okgb on December 04, 2012, 10:52:35 PM
 10 Bux , = No brainer  , I'm in for two , and actually sounds novel
lighter ..............
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: tonycamp on December 05, 2012, 12:49:53 AM
Igor did that on his f76, looks great, i'm down widit 8)
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 05, 2012, 01:11:50 AM
I'm thinking white w/ black markings, it's kindof my thing. :D

Okay, no answer from my local fab house for the brackets, but I've been banging this out in emachinshop. Their software has gotten so much better since I used it years ago! The brackets should be about 10 bucks each as well. But that's at a quantity of 25 or there about.

If I can get commitment for 25 sets of faceplate/bracket, I could get them out for 16 per set.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: baadc0de on December 05, 2012, 07:49:29 AM
Well, yeah, if you can get us brackets and fronts too, I'm definitely in for two (of those) for me to go with the PCBs!
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: benlindell on December 05, 2012, 10:41:28 AM
Well, yeah, if you can get us brackets and fronts too, I'm definitely in for two (of those) for me to go with the PCBs!
Me as well.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: bruno2000 on December 05, 2012, 11:56:33 AM
Well, yeah, if you can get us brackets and fronts too, I'm definitely in for two (of those) for me to go with the PCBs!
Me as well.
Two for me!
Best,
Bruno2000
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: okgb on December 05, 2012, 12:39:57 PM
Yes  in for two sets
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: Marc Duchesne on December 05, 2012, 01:19:47 PM
Two set of faceplate for me too if you go this way...
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: Marc Duchesne on December 05, 2012, 01:22:24 PM
The faceplates / brackets could be shipped with the PC boards I already payed for...
thanks !
-marc
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 05, 2012, 01:27:04 PM
this is looking good. Funny thing is, I spent all last night designing the bracket, and today the original fab shop finally got back to me with a quote. And it's about the same price too.

I will be shipping pcbs and metal together, Don't want to spend any more time at the post office than i have to.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: jandoste on December 05, 2012, 01:55:36 PM
yep,  two for me too! please:)
thanks

Two set of faceplate for me too if you go this way...
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: [silent:arts] on December 05, 2012, 02:00:08 PM
Quote me for two L-Brackets / PCBs are already paid
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: dmp on December 05, 2012, 03:07:03 PM
Add brackets and faceplates for me too
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: JamesW on December 05, 2012, 05:04:08 PM
2 brackets and face plates and hold the boards and ship together

Thanks
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: tonycamp on December 05, 2012, 08:36:58 PM
2 for me. I'll take two of anything that makes the build easier, and helps bring the cost down for everyone
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: mulletchuck on December 06, 2012, 12:47:08 AM
what's the price for a bundle?  PCB, Bracket, Faceplate.  any chances on a group buy of transformers or other parts to bring costs down?   Surely if there are 30+ buys happening, the potential for a group buy is there, no?
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 06, 2012, 03:32:54 AM
Well, I suppose the combined shipping would be the bundled discount. With all the time this is going to take to organize, sort, pack, ship, bill etc, I don't think I can handle any more group buys of smaller off-the shelf components. That's what distributors are for. There comes a time where saving 3 bucks on a transformer is going to cost somebody time or money. In our case, we trade our time for cost savings when building our DIY gear, instead of buying a fully built and tested piece. I've burned myself on a couple of jobs to learn how valuable your free time is, and I'd rather be recording or building gear than sorting and packing boxes. (although, i wouldn't mind if that were my full-time job)
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: okgb on December 06, 2012, 09:31:46 AM

 I would consider handling grp buy for Canada , but I think it's the critical or hard to get parts that are most
important . [ don't want to burn someone out picking resisters .............]
 Grp buy distributors should be in the country of greatest sales or the transformer  / parts manufacturer
to lessen the number of packages going across the border  . I like Lundhal but never see them cheap ,
anyone close to Cinemag ?  keep in mind individual taxes & duties  plus an extra layer of shipping .

If we as a grp could strike a deal for grp discount when ordering from some suppliers , that would be great
Who has bargining power & negoiater skills ?
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: Brolik on December 06, 2012, 10:47:08 AM
I will go for 2 full sets, including metalwork and faceplate.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: tonycamp on December 06, 2012, 11:02:17 AM
Well, I suppose the combined shipping would be the bundled discount. With all the time this is going to take to organize, sort, pack, ship, bill etc, I don't think I can handle any more group buys of smaller off-the shelf components. That's what distributors are for. There comes a time where saving 3 bucks on a transformer is going to cost somebody time or money. In our case, we trade our time for cost savings when building our DIY gear, instead of buying a fully built and tested piece. I've burned myself on a couple of jobs to learn how valuable your free time is, and I'd rather be recording or building gear than sorting and packing boxes. (although, i wouldn't mind if that were my full-time job)

This is exactly right Rodney, been there, done that, filed under "no good deed goes unpunished". I enjoy the hunt a bit, and not being able to get everything from one place. It makes you feel like you're doing something other than making instant coffee. In my view, I'm saving well over 50% of an assembled price, even though they don't exist in the retail market! Anyway you look at it, it's a unique opportunity to create an unobtainium, and a great deal. ;)
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 06, 2012, 09:51:10 PM
So, spent all last night working on importing the front panel into kicad. It's probably not the best for this type of work, but it's what I know. Let me say that importing silkscreen artwork is a bastard.

I wanted the silkscreen to be super high resolution, so the resulting silkscreen gerber is 56MB. I guess that should do it.

I found this nifty online 3d gerber viewer that renders them much nicer than kicad does. Just imagine the solder mask white and the silkscreen black.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 06, 2012, 09:53:41 PM
notice the back is a solid plane with exposed pads that contact the rack mating surface. I'm thinking about doing these in ENIG gold plating to ensure there is no corrosion over time, and to make good electrical contact for shielding.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: DomiStenz on December 07, 2012, 02:16:15 AM
I have already payed for two faceplate/bracket set´s and PCB´s ;)

Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 07, 2012, 10:18:40 AM
Well that's about 30 sets confirmed for metal and faceplate, so I'd say it's a go. Anyone else who wants to pre order those is more than welcome, the capitol is needed.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: okgb on December 07, 2012, 10:22:32 AM

 Are you settled in the price ? should we pay up for the balance ?
I paid for boards but not yet bracket & plate
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: baadc0de on December 07, 2012, 10:26:54 AM

 Are you settled in the price ? should we pay up for the balance ?
I paid for boards but not yet bracket & plate

+1
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 07, 2012, 10:58:44 AM
16 per set, no additional shipping should be required.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: [silent:arts] on December 07, 2012, 11:01:51 AM
Paid for 2 x PCBs, and would like to add 2 x L-Brackets ...
How much do I owe you?
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 07, 2012, 11:52:22 AM
Just the 16 for each set. 32 total.
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: Tajmoben on December 07, 2012, 12:01:50 PM
So we're looking @ a total of $34 for the board, faceplate, and L-bracket together?
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: bkbirge on December 07, 2012, 12:04:59 PM
Hey Rodney, paid for 6x bracket/faceplate, looking forward to the build!
Title: Re: [GROUP BUY] G9 in 51X format (Accepting pre-order payment, ordering soon!)
Post by: gemini86 on December 07, 2012, 12:12:33 PM
So we're looking @ a total of $34 for the board, faceplate, and L-bracket together?

Yes. I will update the first post to reflect this.
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: gemini86 on December 08, 2012, 01:35:51 AM
Here's a (fairly) organized BOM. I've been checking mouser stock to see what's there and available, as far as WIMA caps go. Everything should be good there. I've made sure all the signal caps have multiple lead spacing options for different caps, some like WIMA, some like orange drops for tube circuits (like myself) some go for the yellow mallory type, which will work, but just aren't meant for this layout. Can't please em all, I guess. I didn't add mouser numbers for the real generic things. Resistors, 'lytics, diodes, etc. These things should be pretty easy to figure out and lots of us have extras laying around from other projects. I'll let you do the shopping.

UPDATE: I have enough money gathered for the PCB puchase, but I'm still uncertain as to how many metal/faceplate sets are needed. I'll likely need a few more pre-orders of those to get the purchase made.

Need to know how many faceplates to order and the PCB sets and faceplate order can be out in. Metal will take about 20 days to be delivered, PCBs will ship out in 12, once all orders are placed.

I would hate for anyone to be left naked and cold without a faceplate.... :(

-- UPDATE: 1/4/2013 -- change to BOM: switched from to 6-32 x 1" threaded standoff to 4-40 x 1"
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: Kurtsa on December 08, 2012, 08:39:00 AM
Paid for two sets (pcb+metal/faceplate).
_
Kurtsa
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: jandoste on December 08, 2012, 09:07:48 AM
Hey,
I already paid for the PBC set so how much I need to pay for metal/faceplate set?
Thanks
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: Marc Duchesne on December 08, 2012, 12:20:05 PM
PayPal payment sent to you for two faceplates / brackets to go with my boards.

-thanks !
-marc
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: gemini86 on December 08, 2012, 12:21:17 PM
Hey,
I already paid for the PBC set so how much I need to pay for metal/faceplate set?
Thanks

The metal and faceplate set is another 16 per set, no additional shipping.
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: bruce0 on December 08, 2012, 02:21:40 PM
Good prices.
I already paid for 4 PCB sets, and just sent payment for 4 of the metal faceplate kits. 

Thanks
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: mulletchuck on December 08, 2012, 03:35:36 PM
You gonna update the first post to indicate the total cost per PCB/Faceplate/Metalwork bundle?
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: gemini86 on December 08, 2012, 04:33:25 PM
I deed...

I'll adjust the formatting to be earier to spot. I'm trying not to wipe away any old information.

Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: [silent:arts] on December 08, 2012, 05:08:39 PM
I know it is a pain ...

Since I don't want PCB face plates, and prefer customized panels anyway:
invoice me for two L-Brackets an addition to the PCB Sets.
If not possible fine, I will stay with the PCB Sets only.
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: gemini86 on December 08, 2012, 05:32:21 PM
That won't be a problem. They'll just be 8 each.
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: [silent:arts] on December 08, 2012, 05:45:23 PM
Thanks. paypaled USD 18 for two L-Brackets in addition to the two PCB sets already paid.
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: mitsos on December 08, 2012, 08:02:32 PM
Hey man! Thanks for seeing this through to the end!! Been disconnected for a couple of weeks and almost missed this! 

I'm in for two full sets (PCB/metal) for sure. 

When will you be ordering and do you think they'll make it to Chicago by mid Jan?

thanks!
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: gemini86 on December 08, 2012, 08:35:57 PM
I'd like to order soon, and if everything goes well, mid January sounds about right.
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: shabtek on December 09, 2012, 12:15:37 AM
it looks like the hole for the 1-4" jack is not in the same place when comparing the .fpd version to the green fiberglass
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: gemini86 on December 09, 2012, 01:38:29 AM
You're right! Sorry, it is not... I need to take that down.

The FPD file was a mockup for a price & aesthetics verification. I'll revise the FPD file to be perfectly accurate.

Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: gemini86 on December 09, 2012, 02:27:02 AM
Updated FPD file here. (http://www.groupdiy.com/index.php?topic=46242.msg641010#msg641010)

The instrument jack wasn't off so much as the toggles. I double checked everything against the PCB files. It should be golden now. But as I stated before. I have not physically tested the fpd against the prototype, because the prototype PCBs are different from what the final product will be. So, YMMV. (sorry, I am but a mortal.)
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: jandoste on December 09, 2012, 05:51:57 AM
paypaled 32$ for two L-Brackets/FP in addition to the two PCB sets already paid too!
Thanks
Title: Re: [GROUP BUY] G9 in 51X format (preorder metal/faceplate kits, ordering soon!)
Post by: ericjazz on December 09, 2012, 07:42:13 AM
Just paid for 1*bracket and frontplate kit in addition to the pcb already paid.
Thanks Roddy.
Eric
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on December 10, 2012, 01:02:57 AM
PCBs, faceplates and metal have all been ordered. Will keep you all updated on the status of our stuff.

The information in this thread is really a cluster **ck, but not to worry! I will do a detailed, photographed build thread once everything arrives.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: Kevin on December 10, 2012, 05:50:27 AM
could i add also 2 faceplates to my pcbs... will there be in the future other stuff??Kits??
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on December 10, 2012, 12:02:49 PM
No problem, Kevin. I doubt that, in my current lack of free time, I'll be doing small parts kits.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: bruno2000 on December 10, 2012, 01:47:17 PM
Just sent $$$ for brackets and fronts.
Thanks for doing this!
Best,
Bruno2000
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: Winetree on December 10, 2012, 03:06:52 PM
Payment sent for 4-metal brackets and faceplates for total of:
4-P.S.Bs and 4-Metal kits paid in full.
Thanks
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: Graph on December 10, 2012, 08:55:11 PM
Sorry, i didnt saw the order, have you finished it?

Want to add to my pcb which i paid(i sent 24usd for pcb and international shipping and tax convertion) L bracket and faceplate, is it possible yet? how much should i send?

Thank you
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on December 10, 2012, 09:14:42 PM
Not a problem, Graph. Just send another 16USD + 3.5% currency conversion. I'll ship it all together.

Big thank you to everyone who pre-ordered, you guys helped make this happen!
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: Graph on December 10, 2012, 10:40:38 PM
Not a problem, Graph. Just send another 16USD + 3.5% currency conversion. I'll ship it all together.

Big thank you to everyone who pre-ordered, you guys helped make this happen!
Payment sent :)

thank you for this great project, i will move my G9 from the rack to my 51x rack
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: mitsos on December 11, 2012, 06:36:03 AM
Hi Rodney,

just paid for 2 PCBs, no metal for me for now.  Do you think you might ship PCB-only orders when those come in?

Also, are you ordering any extras, in case I change my mind?

thanks again for doing this!
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on December 11, 2012, 10:18:52 AM
Mitsos,

Yes and yes.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: mitsos on December 11, 2012, 11:29:34 AM
cool thanks. I think I'm reverting to VPR from 51x and these might go in 1U instead of the rack.  But I might change my mind in which case, I might need metal, so good to know there will be extras!

thanks!
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: DomiStenz on December 12, 2012, 12:36:39 AM
Hi,
i make a BOM with Mouser Part Nr. and Hyperlinks.
Please Check the part Nr. bevor you buy.
https://www.dropbox.com/s/9tobmybodobeol4/G9%20511%20BOM.xlsx (https://www.dropbox.com/s/9tobmybodobeol4/G9%20511%20BOM.xlsx)
PS.: When you find a mistake please send me a PM.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: mitsos on December 12, 2012, 10:22:53 PM
PCBs, faceplates and metal have all been ordered. Will keep you all updated on the status of our stuff.
hey, I missed this post.  Good news!

Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on December 12, 2012, 11:46:37 PM
I'll make sure to send yours out ASAP, since I know you have time constraints. They're in production now, scheduled to ship out on the 24th. Shipping shouldn't be much more than a week.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: mitsos on December 13, 2012, 06:29:15 AM
Awesome, thanks man!  Can't wait!
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: bruce0 on December 13, 2012, 07:20:30 PM
Gemini:

I want to thank you (on behalf of all of us readers and participants, lest this turn too gooey) for your prompt and clear communication, and incredible schedule.  You are moving REALLY fast on this (take a look at some of the other feelers and even some white market threads (with no offense intended) and you will see that often the month changes on the thread before anything happens ... sometimes the YEAR! )

You on the other hand are a machine!  On your thread... sometimes the day doesn't change!  It is very exciting, and I really appreciate it. Shipping out the the day before christmas is sort of amazing, and while appreciated, don't burn yourself out.

Thanks for doing it.

Bruce
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on December 13, 2012, 07:50:03 PM
Thanks for the kind words. I know i was a no show for a while when i was having dc converter issues, as well as personal issues, but i felt bad for keeping everyone in the dark. Development takes a long time, and a lot of money. I wanted this project to be clean and the layout correct the first time. My 9k2 pcbs are a good example of rushing it and dealing with the consequences.

I see now that my earlier post could be easily misunderstood. The pcbs will ship from fabrication on the 24th. I'll likely get them after Christmas.

I'm already starting work on my next project. Trying to keep it under wraps until i have more set in stone. Just a hint; pentode based classic.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: DomiStenz on December 14, 2012, 06:14:28 AM
Hi Rodney,

it is no problem for me! I know it and i gladness to read when the end is near  :)

Regards

PS. if you have time, can you check the BOM that I posted?
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: mitsos on December 15, 2012, 09:05:56 AM
I'm already starting work on my next project. Trying to keep it under wraps until i have more set in stone. Just a hint; pentode based classic.
51X as well?  If so I might have to keep on the 51X wagon a bit longer and will need metal for my G9s!  cheers!
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on December 15, 2012, 11:40:10 AM
I think so. There's just not enough power available in one 500 space.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: wowi on December 17, 2012, 07:56:55 AM
Just paypalled for 2 Sets of PCBs and metalwork
thanks
Wolfgang
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: area8 on December 27, 2012, 04:05:40 PM
Nice work - great project. This reminds of something I've been thinking about trying, though:

Wouldn't it be handy to use maybe 48VAC (24VAC might also be plenty) connected to the 51X 24VDC pins, instead of the usual +-VDC higher rails, in order to experiment with tube stuff in general, and on-board regulation and would allow doublers and triplers and whatever for higher anode voltages?

The only thing I'm concerned about at first blush is possible noise coupled/induced elsewhere. Obviously, the normal 51X boards wouldn't work in it, but I could see splitting a backplane for half real 51X, then half special tube side, with two different supplies.

I could see potential for higher current applications like even maybe modular guitar amps, monitor amps, etc., assuming no noise issues and current handling of the backplane traces was there. Hmmm - do Tonelux already do something like this? (sorry, thinking out loud here)

Oh - I plan to order a couple of these boards shortly - thanks.

Frank
Area8




Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on December 27, 2012, 04:28:27 PM
Hi there. Take a closer look and see that the b+ voltages are already at around 240v. The boost converter that generates this voltage is much much more efficient than a Trippler/Quadrupler could ever be. This module is designed to go in a 51x rack.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: okgb on December 27, 2012, 06:37:25 PM
Code: [Select]
Wouldn't it be handy to use maybe 48VAC (24VAC might also be plenty) connected to the 51X 24VDC pins, instead of the usual +-VDC higher rails, in order to experiment with tube stuff in general, and on-board regulation and would allow doublers and triplers and whatever for higher anode voltages?
 there's a tested working prototype built with boards ordered , let us know if you get something working though
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: area8 on December 28, 2012, 02:39:26 PM
Hi, and thanks for the replies... I might not have made myself very clear, for which I apologize -

Firstly, Gemini, I wasn't making any commentary on your current design for the current 51x std, which I find excellent, and realize that you already have high B+ after conversion, so I wasn't implying by any means that you didn't - looks like an excellent solution.

My idea, which I've kicked around since I first received my 51X chassis, was to use AC voltage on the 24V pins, in order to more easily support on-board triplers and such, for general tube work (not related to your current board, and didn't mean to hijack - you just reminded me), including potentially things other than our traditional recording gear. I think it might be a good, flexible way to support lots of different voltages without resorting to DC-DC converters and such, and hopefully lowering the cost. My biggest concern is the likelihood of AC coupling of 50/60Hz.
And yes, I realize that current gets cut in half every time you double voltage. Supply enough current (not that a couple of plates generally take that much to begin with), and no problem.

Anyway, just an idea for now, but I'm thinking about splitting my 11-slot backplane to try it sometime (after I finish about 12 other projects), or just try it on a jig (like Igor's) first.

And now back to your originally scheduled program...

Cheers,
Frank
Area8
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: area8 on December 28, 2012, 03:19:08 PM
BTW - I like the little MAX1771 you used - nice converter at a good price. Looks like an excellent boost circuit, overall.

Frank
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: mulletchuck on December 28, 2012, 06:13:32 PM
you'd need to drill another hole in your 51X rack to hardwire the AC lines to your rack, if you didn't want to hardwire for 24(48) VAC inside the PSU, right?
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: area8 on December 28, 2012, 06:36:47 PM
Yeah, the separate connection would have to be kludged somehow, and need to use a separate supply with the AC. The backplane would need to be split (physically cut traces between two halves) in this case... or you could use a 51X chassis as-is, but use a different supply with the AC on it, not the usual one. I used to cut computer backplanes all the time as part of a normal installation of "mini-computers" back in the day, so I know it isn't particularly hard to do. (There can be termination issues, though we aren't dealing with high-frequency data or RF here, just (relatively) low freq AF and some voltages.)

Please don't go trying this based on my idea, unless you really know what you are doing and you are ready for some serious testing for noise, and any Murphy factors I haven't considered yet - I haven't tried it yet. It could well turn out to be a really bad idea; I've had my share of them over the years (and a few winners, too).

When I get around to trying this, I'll breadboard something and use Igor's "Rackit" jig first to connect everything to just one slot... that won't tell me anything about noise or crosstalk to other slots over a backplane or anything, but it will let me get something working first. It'll be awhile.

Unless you are really adventurous, please stick to this fine G9 board. Please.

Cheers,
Frank
Area8
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: okgb on December 28, 2012, 08:54:11 PM

 Perhaps for the 71 x  [ so to be ] standard ?
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on December 29, 2012, 01:59:54 AM
I still don't understand why you would want a voltage multiplier with all of it's losses in heat and diode drop, not to mention adding a huge ac signal right there at a very audible 60Hz, over a high efficiency boost converter. The converter can be tailored to suite whatever voltage you want, from 48v to 400v. If you're going to put AC voltage in the rack, put 120V in there so you can have small transformers in board. This would then be a totally different type of rack, and more like the old telefunken/siemens series of modules, which is not a bad thing at all. But then, why not do it based on a DIN rack, something more widely used for non specialized purposes, therefor cheaper and readily available.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: tonycamp on January 03, 2013, 08:52:38 PM
Hi Rodney,

Hey, what's the status on delivery of the stuff?, forgive me if i missed it. BTW, thanx for doing this cool project for us, I'm really looking forward to building my pair.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on January 03, 2013, 09:05:55 PM
I should be getting a package tomorrow, orders will be shipped shortly after.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: Sredna on January 03, 2013, 09:33:39 PM
Is it too late to order 2 PCBs + faceplate + bracket?

Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on January 04, 2013, 12:32:00 AM
Definitely not. I knew that the holidays would be busy for some people, so I have extras. All relevant info is in the first post of this thread.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: Albrebreton on January 04, 2013, 03:55:33 AM
Hi Rodney, sorry, I been disconnected these holidays and I missed it too.
Is it too late to add also 2 faceplates and brackets to the 2 PCB sets already paid?
Best Regards.
Alberto
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: Sredna on January 04, 2013, 05:17:01 AM
Paid for 2 PCBs + 2 faceplates +  2 brackets  8)

Thanks,

Anders
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: irfrench on January 04, 2013, 11:19:08 AM
Hi,

Payment sent for 2 sets of pcbs and metalwork/front panel.  :)

Thanks,
Ian
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on January 04, 2013, 12:10:35 PM
Hi Rodney, sorry, I been disconnected these holidays and I missed it too.
Is it too late to add also 2 faceplates and brackets to the 2 PCB sets already paid?
Best Regards.
Alberto

No problem, Alberto.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: Albrebreton on January 04, 2013, 05:09:28 PM
Hi, Rodney, payment for 2 sets of metalwork and front panels done.
Thank you.
Alberto
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on January 04, 2013, 05:40:34 PM
Received...

Sitting here at home, feeling torn between taking my dogs out to the park to play, or waiting for the UPS guy to show up. I have this feeling if I leave, I'll get the dreaded door sticker.
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: tonycamp on January 04, 2013, 08:47:59 PM
I have this feeling if I leave, I'll get the dreaded door sticker.


Noooooooooooooooooooooooooooooooooooooooo! A fate worse than death!
Title: Re: [GROUP BUY] G9 in 51X format (Order placed! PCBS/KITS COMING SOON)
Post by: gemini86 on January 05, 2013, 12:56:19 AM
Just a teaser update. Everything came in today. I'm in the process of taking some pics, fitting some of the critical mechanical components and checking that things line up the way I had planned. It's looking very, very good so far. Will post pics tomorrow.

--- Important note --

The BOM has been updated (attached to this post for your convenience). I've made my mounting holes a tad too small for 6/32 screws, so I've switched to 4/40 screws for the tube board standoffs. Other than that, I haven't run into any problems with the pcb fit.
Title: Re: [GROUP BUY] G9 in 51X format (PCBS have arrived, will be shipping out soon)
Post by: bruce0 on January 09, 2013, 10:23:59 PM
Got my 4 full kits today and they look great!

Can't wait to get going.

The quality is so high, would you mind posting 3 bits of information if you don't consider it confidential:
1) Who made the cards and faceplate (PCB-CART?)
2) Who made the L-Bracket (it is really nice).
3) What special specifications do you need to provide to get a faceplate made (board thickness, and how did you get the back of the faceplate to be without soldermask and (copper/gold) which is it?

Anyway... Really awesome looking parts...
Title: Re: [GROUP BUY] G9 in 51X format (PCBS have arrived, will be shipping out soon)
Post by: gemini86 on January 09, 2013, 10:34:30 PM
I used PCB cart for the PCBs, I emailed ahead of ordering to make sure they would do the faceplates and guarantee the silkscreen quality (looks like they put it on extra thick). They are very very good with communication and making sure everything will be the way you want it. They always find little nitpick errors and things I forget to think about. Overall good quality company. The only minor problem I've had with them is that faceplate hole thing. Some of the holes aren't perfectly round, perfect size, etc but I'm not too bent up about it. As for the gold on the back, that's all specified in the quote, then just make sure the gerbers are all there. The rest of the details were just by email.

I wish the soldermask was a little better, some blemishes and stuff that bugs me, but not bad.

A designed the bracket in sketchup with my 3D model of the boards all laid out, then imported that into Emachineshop cad software, which I then had to tweak a bit to get to work. That software is great, but it can be a bit to figure out at first. Then all I had to do was send the files and then give them my credit card. I was really pleased with the way those turned out. Just wish I had ordered more than I did. I didn't realize the metal and faceplate kits would be such a hit.
Title: Re: [GROUP BUY] G9 in 51X format (group buy closed, will be shipping out soon)
Post by: gemini86 on January 10, 2013, 11:54:55 PM
Announcement:

The group buy is closed and PCB sets/brackets/faceplates are being shipped out asap, there are limited leftovers/extras. PLEASE PM OR EMAIL ME BEFORE SENDING ME MONEY.

Ok, looks like the brackets and all but 2 faceplates are gone. That was fast.
Title: Re: [GROUP BUY] G9 in 51X format (group buy closed, will be shipping out soon)
Post by: bkbirge on January 11, 2013, 01:03:40 PM
Got my pcb's last night, very impressive build quality. I think these have just moved to the front of my backlog. Really looking forward to putting them together. The face plates look great too. Fantastic work!
Title: Re: [GROUP BUY] G9 in 51X format (group buy closed, will be shipping out soon)
Post by: Graph on January 22, 2013, 03:13:15 PM
Hi gemini, one question, when have you made the shippment?

I am from Argentina, so i guess it would take between 14-21 days to get here :) only to know if there is any trouble with shippment.

Thank you!
Title: Re: [GROUP BUY] G9 in 51X format (group buy closed, will be shipping out soon)
Post by: gemini86 on January 22, 2013, 03:31:08 PM
Some have been shipped, some are going to ship this week. You will each get an email from stamps.com to confirm shipment, as well as a tracking number where available.
Title: Re: [GROUP BUY] G9 in 51X format (group buy closed, will be shipping out soon)
Post by: Graph on January 24, 2013, 06:43:32 PM
Some have been shipped, some are going to ship this week. You will each get an email from stamps.com to confirm shipment, as well as a tracking number where available.
Okey thanks for the reply i will be waiting for the mail to arrive :)
Title: Re: [GROUP BUY] G9 in 51X format (group buy closed, will be shipping out soon)
Post by: gemini86 on February 10, 2013, 02:29:23 AM
Okay, now that everything is shipped out, I want to dip a toe into the water here...

How many of you guys are wanting brackets/faceplates still? I have PCB sets left, but no hardware and people keep asking about them. If there's enough of you needing them still (or maybe in the future sometime) I'll put together another order. The only catch is that since it will be a smaller order, the price has to go up. Probably closer to 20 per set, depending on price.

Any who are interested, please raise your hand...
Title: Re: [GROUP BUY] G9 in 51X format (group buy closed, will be shipping out soon)
Post by: bruce0 on February 10, 2013, 08:48:23 AM
I'm in for two bracket faceplates  ;D

Title: Re: [GROUP BUY] G9 in 51X format (group buy closed, will be shipping out soon)
Post by: kvothe on February 11, 2013, 08:49:09 AM
I would like 2 complete sets!
Title: Re: [GROUP BUY] G9 in 51X format (group buy closed, will be shipping out soon)
Post by: Woot on February 16, 2013, 04:41:15 PM
Hi

I would also be keen for 2x full sets if possible.

Thanks!

Matt
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: JamesW on February 16, 2013, 10:46:28 PM
I'm still waiting for mine. The tracking shows they were in LA on the 3rd
Hope they show this week
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on February 16, 2013, 10:54:27 PM
Yeah, unfortunately the tracking stops once it leaves the US customs office. It should be on the other side of the boarder by now, and I imagine it will be delivered sometime next week, depending on how long it sits on someone's desk at customs.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: okgb on February 17, 2013, 09:04:30 AM
Received mine in Canada last week
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: jandoste on February 17, 2013, 11:39:45 AM
Received my boards :)
Thnaks
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: Albrebreton on February 18, 2013, 05:11:26 AM
Hi, Rodney, received mine too, and they look really great.
Thank you
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: JamesW on February 18, 2013, 08:49:40 PM
Got my kits today look great

Thanks
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: Marc Duchesne on February 18, 2013, 09:12:44 PM
Received mine today, very nice. Thanks !!
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: Graph on February 21, 2013, 12:28:52 PM
Arrived few days ago :)

Checking on BOM to order components.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: [silent:arts] on March 06, 2013, 05:49:46 AM
Received mine in germany today  8)
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: ChrioN on March 06, 2013, 06:39:02 AM
I would like 8 pcbs. Still got some?

Actually, I would need 8 brackets as well.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on March 07, 2013, 02:07:33 PM
Still have pcbs, out of brackets. There's growing interest in bracket and faceplate sets, if i have orders for 25 pieces, I'll get some more made.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: sharpeleven on March 07, 2013, 06:31:58 PM
4 PCB's & 4 brackets, please
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: bruce0 on March 07, 2013, 08:31:59 PM
2 brackets 2 faceplates please.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: sharpeleven on March 08, 2013, 02:08:23 PM
also 4 faceplates for me please 8)
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: mhuss on March 12, 2013, 04:46:56 PM
2 of all of the above for me.  :)

--mark
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on March 13, 2013, 12:19:18 AM
Okay, so it looks like there's enough of you that want brackets and faceplates to make it happen.

I don't have enough free cash myself, so I'll be collecting money up front like last time.

To make this easier on me, please send me an email ([email protected]) and let me know how many of what items you want, where it's going to and your paypal address. I'll send you an invoice and you can pay from there.

faceplates and brackets will be 10 USD each for this short run, pcbs are still at 18 per set. I will be charging actual shipping via USPS (first class for international packages and priority for domestic).

Once all the money is in, I'll get the orders placed and shipped out once they arrive. I've got my shipping outfit all set up now, so it'll be quicker this time.


Please see the new 2nd run thread for order info here (http://www.groupdiy.com/index.php?topic=52069.0).
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on March 21, 2013, 09:54:46 PM
Hi, it's me again.

I'm just bumping again so we can get this train rolling out the station.

So far I have confirmed that we will definitely need:

8 faceplates
8 brackets

So, we're not quite there yet. So if you haven't done so already, please send me an email ([email protected]) and let me know how many of what items you want, where it's going to and your paypal address. I'll send you an invoice . Once we're all in, the order will be placed and you all get shiny new things :D
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on April 02, 2013, 12:33:58 AM
Just an update...

This seems to be in a holding pattern for now. Most of the interest that seemed to be there before has faded, so the brackets and faceplates won't be available for some time. I do plan on having more made just so the rest of these PCB sets don't sit collecting dust forever.

However, if you are thinking about building a dual channel 1U G9, these pcbs are the ticket!
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: tonycamp on April 02, 2013, 02:32:19 AM
Hi Rodney,

i still haven't built my first set, but if it'll help, count me in for a couple more complete sets, I know i'll end up wanting them anyway.

you have my paypal
thanx
T
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: bkbirge on April 03, 2013, 11:20:25 AM
Yeah put me down for a couple more complete sets also.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: Toure14 on April 08, 2013, 09:51:06 PM
Hello,

this may be a newb question but are there pictures of the complete build posted anywhere? Also what about the bom? I notice this thread only has the pcb and the metal work and faceplate. I would need some sort of directions to complete this build.

if these questions have been answered already would some one kindly point me to the page or the proper thread?

Thanks
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on April 08, 2013, 10:18:24 PM
Build thread:

http://www.groupdiy.com/index.php?topic=51020.0
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: Toure14 on April 08, 2013, 11:09:29 PM
Thanks....for the speedy reply.

I am very interested but I had some questions that I needed answers to so I posted them in the build thread before I pull the trigger... ;D
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: Toure14 on April 12, 2013, 08:14:58 PM
I complete set for me.   Thanks
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on April 12, 2013, 10:53:31 PM
So, in case anyone is subscribed to this thread, waiting for updates. Please go here (http://www.groupdiy.com/index.php?topic=52069.0) to get in on the second run.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on April 12, 2013, 10:56:55 PM
I complete set for me.   Thanks

Sorry that it's so confusing in this thread... there aren't currently brackets and faceplates available. I'm working on getting more so go jump in on the second run thread to claim a set.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: wink0195 on June 01, 2013, 07:38:59 PM
I'm interested in a dual channel 1 u g9. or a single channel depending on the price. How much for pcbs?

Thanks - Andrew
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on June 01, 2013, 08:47:10 PM
Please see this thread for details.

http://www.groupdiy.com/index.php?topic=52069.0 (http://www.groupdiy.com/index.php?topic=52069.0)

I do have full kits and I'm shipping this week. Please PM me your address for a shipping quote.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: mulletchuck on June 06, 2013, 11:15:22 AM
There's somethin' wrong with this picture, Gemini...

Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on June 06, 2013, 12:26:06 PM
Gah! Sorry bout that man. Will send the other main pcb asap.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: mulletchuck on June 06, 2013, 12:53:11 PM
it's all good!   ...as long as you have it still in stock lolool
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: gemini86 on June 06, 2013, 03:03:48 PM
Oh yeah I still have it.
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: Dr Gris on June 06, 2013, 05:27:21 PM
There's somethin' wrong with this picture, Gemini...

Yeah, there seems to be water in the glass...  ;)
Title: Re: [GROUP BUY] G9 in 51X format (all shipped, still pcbs left)
Post by: dmnieto on December 05, 2013, 02:37:32 AM
Hey gemini, do you have still any left?
Title: Re: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: gemini86 on December 05, 2013, 12:12:51 PM
Hi, sorry no.

I've updated the thread title to reflect the current state of "preamplessness" that is the GIX-51X.
Title: Re: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: dmnieto on December 05, 2013, 02:09:05 PM
Any plans of making more in the future? Because I will be *very* interested.

I can etch pcb's, but metalwork is out of my league
Title: Re: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: gemini86 on December 06, 2013, 11:22:44 PM
At the moment, I don't have any plans to do a third run.

Not enough people interested, not enough free time to actually do it.
Title: Re: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: qwerty8787 on January 15, 2015, 11:44:52 AM
Don't know if it will ever come alive again, but in case I'll take two sets  8)
Title: Re: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: morbleu on January 15, 2015, 12:40:34 PM
Me too! very interested in 2 Sets!

Andreas
Title: Re: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: qmp audio on January 15, 2015, 02:09:06 PM
I would do another pair if they where ever available again.
I love them,  use them somewhere on every session.   Just did a banjo session yesterday and GIX was the winning pre for that.
Title: Re: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: gemini86 on January 22, 2015, 01:01:52 AM
I hope to someday do another run, with a couple revisions/improvements and a completely redesigned, possibly pre-assembled HV converter. Whether or not that can realistically happen anytime soon, who knows. I'm currently working two jobs to make ends meet, so free time is zip.
Title: Re: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: TheJames on January 26, 2015, 10:27:43 AM
I picked up a pair of these unbuilt in the Blackmarket back in November.  It was hands down one of the fastest and easiest builds I've done.  The only thing that tripped me up was finding a couple of properly sized caps in a couple of spots.

The HV module could be made as a totally separate project.  I was looking at doing one for powering a couple of tubes in another project without having to buy a HV transformer.

Title: Re: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: delmonton on June 10, 2015, 06:51:26 AM
i would love to build a pair of these ..
Title: Re: [GROUP BUY] G9 in 51X format (CLOSED, ALL STOCK GONE)
Post by: Graph on June 17, 2015, 04:42:16 AM
I havent build mine yet, since i couldnt find some components with right measures(some were out of stock from mouser when i ordered and others.. i missed the measures :P). Hoping to build it soon since my lunchbox is nearly in my studio :)