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General Discussions => The Lab => Topic started by: Igor on July 13, 2010, 01:41:16 PM

Title: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on July 13, 2010, 01:41:16 PM
Just to share some pictures...

Seems like my 51x rack will be filed with another pair of compressors...

In case of whatever, NOT FOR COMMERCIAL PURPOSE!!! FOR EDUCATION USE ONLY!!!! :)

(http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/51X_F76_preview.jpg)

http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/51X_F76_prevw_front.jpg

http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/MAIN_SCH.png

http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/PCB_TOP_PREV.png

http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/PCB_BTM_PREV.png

http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/GR_SCHEM.png

http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/IN_AMP.png

http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/OUT_AMP.png


Features:
2:1 ratio added
Sidechain HPF (100Hz)
Many types of amplifiers can be used here as well as original 1176
No need for DC/DC converter
Input balanced line receiver and pot/ or transformer and 600Ohm att option
Should work on +/-16 and +/-24 or +/-16V only (for owners of Lunchbox who still not get into 51X :)
Etc etc....
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Brolik on July 13, 2010, 02:18:27 PM
damn man. you're outta control
Title: Re: 1176 in 51x/500 format: almost there!
Post by: AudioGimmer on July 13, 2010, 02:43:41 PM
Wow way to go Igor!!.... And I haven't had time to start my Mixbuzz yet.......


AG
Title: Re: 1176 in 51x/500 format: almost there!
Post by: briomusic on July 13, 2010, 03:22:25 PM
great, I just needed a little push into 1176 land...  8)

few initial questions:
-which revision is this based on, and what changes (if any) to the original sound/functionality, except the very welcome addition of SC HPF?
(I am delighted to see that the analog meter disappeared, rather than the transformers  ;D )

-any plans for stereo link via the 500 series stereo link connection?
Title: Re: 1176 in 51x/500 format: almost there!
Post by: dandeurloo on July 13, 2010, 03:58:48 PM
i'd love to know these as well.  I to like the LEDs with transformers instead of VU.
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Igor on July 13, 2010, 04:12:00 PM
Quote
great, I just needed a little push into 1176 land...  Cool

Welcome! :)

I make my UN76 commercially, stereo in 2RU, same gain reduction circuit,
but with Neve class A output stage, my output trunny's (HI-B C-core),
and some other tweaks, about 5 years. First version of UN76 was done for my friend,
http://tantanstudios.com/gear
/just for impression :)

Quote
few initial questions:
-which revision is this based on, and what changes (if any) to the original sound/functionality, except the very welcome addition of SC HPF?

About revisions,
http://www.uaudio.com/webzine/2003/august/index4.html

For now, I made DOA adapters PCB's for input and output amplifiers as in 1176 REV. F.

Most of discrete op-amps as well as adapter board for NE5534/etc will work here.
51X-F76 done to work in both 51 and 500 cases, it is matter of amplification stages used.

A chance to try 1176 with Forssell FET or JLM op-amps!!!

Maybe, I will do single ended output amp PCB like in rev. A-E.
The problem is there's no A-E rev. (5002) output transformer substitute which fits into 500 format.

I added current source at the output stage of input amplifier (lower output impedance,
possibility to use 10k log pot for output control),
and changed some resistors values to let it work right at 24V.
For those who cares about sound signature of amplifiers,
it is same at analyzer and sound-wise; I run input amplifier at +24V
in my UN76 for years with this mode.

Most of sound comes from transformers and distorted FET; it depends how "distortion" trimmer
(R16 according to orig.1176 rev F) is (mis)adjusted.

Another tweak-up/down's..... Ratio 1:2 is useful with vocals, guitars, soft
coloring compression, etc.

I want to try 2520 at output stage with API output trafo.

SLAM mode: when ratio switch is at 4 or 20 position, it is exactly same way
as it happens when all 4 RATIO buttons IN.

Another "mod", for 51x-F76, circuit before diode rectifier with 4 transistors and
pervert values resistors thrown from there and replaced with 2 op-amps. It does not affects
neither sound nor compression, but saves some space on PCB and makes build easY-er.

I prefer stepped attack and release controls, release control /11-pos switch/ done as 5meg log pot.
Attack control is 11-pos switch, acts like 100k extended log pot.
Other values can be used for attack/release.

I can use potentiometers instead of switches, BUT 5meg log pot is impossible to find in size
which fits in 500 format. Recall-ability is matter as well.

Quote
(I am delighted to see that the analog meter disappeared, rather than the transformers  Grin )

I prefer line level 10k:2k4 input transformer and 2k5 log pot on its secondary for input,
but it is impossible to fit big trunny in 500 format.
Input options are: OEP 2:1 or Altran 0-12 copy with 600 Ohm attenuator;
balanced line receiver like THAT1246/OPA137/SSM2143 with 10k log pot.
/edit: ssm2143, all these line receivers are -6db gain

To run it as cheap drum compressor, I can fit balanced line driver and balanced line receivers instead of trafos and make 8 of 51X-F76....instead of distr/essor's; bad taste but money-saving :)
Seriously, this can be version to learn how things work.

Yes, all we like analog meters, but no space here.
I will do my test version with Altran O-12 and API output clones from Hairball Audio.

Quote
-any plans for stereo link via the 500 series stereo link connection?
Already there. FET matching is pain, but IMHO it works better than summing the signal
into mono before detectors.
Title: Re: 1176 in 51x/500 format: almost there!
Post by: helterbelter on July 13, 2010, 04:47:55 PM
Wicked.... unfortunately I'm not able to afford myself a pair. But this is something unique. Damn....
Title: Re: 1176 in 51x/500 format: almost there!
Post by: dmp on July 13, 2010, 05:37:53 PM
EA-5002 from Hairball audio fits in 1U. Transformer is 1.5" wide.
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Igor on July 13, 2010, 06:35:56 PM
Have a pair of them, great runny's....
They measure 1.4x1.9x2.3', vert. mounting bracket, but don't fit into 500, mind, we need some space too....
I have a good feel wit API output transformer clone........
Title: Re: 1176 in 51x/500 format: almost there!
Post by: deuc224 on July 13, 2010, 09:17:16 PM
damn these just came out of no where. I think this might push me into 500 series land :'(

P.S. Those are tears of joy lol.
Title: Re: 1176 in 51x/500 format: almost there!
Post by: jsteiger on July 13, 2010, 09:32:18 PM
Boy Igor. You are a machine.  ;D

A tip of the hat to you. Looking very good as usual.  :o  :)
Title: Re: 1176 in 51x/500 format: almost there!
Post by: RedNoise on July 13, 2010, 09:35:58 PM
wow e-gore !!!! what's in your pipe man???Can't wait to get a pair!!Hat off! :o

EDIT :
Bakelite front pannel ?
LM3914 for GR metering ?
Title: Re: 1176 in 51x/500 format: almost there!
Post by: stereokillah on July 13, 2010, 09:53:41 PM
hehehe, mine is almost finish , just need board, bom and parts  :P
there is some place nearly my mixbuzz500 and my future 51 DAOC.

after a good eq multiband will be fine
Title: Re: 1176 in 51x/500 format: almost there!
Post by: ultra-alex on July 14, 2010, 04:22:03 AM
awesome, igor :)
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Ryake on July 14, 2010, 05:54:12 PM
I want one!
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Igor on July 14, 2010, 06:24:12 PM
Quote
P.S. Those are tears of joy lol
LMAO :)

Quote
Boy Igor. You are a machine.
Nooooo....;)

Quote
wow e-gore !!!! what's in your pipe man???

Once to clarify. I don't smoke anything except tobacco.
Preferred types:
long cut Virginia Flakes and Erinmore Mixture. Sometimes, when
I am not at home and nobody in radius 20 meters, I smoke specially
dedicated pipe filled with strong Balkan Latakia, this is very stenchy for others but
people who smoke it enjoy from very reach, cool taste. My girlfriend btw hate Latakia :)

Quote
Bakelite front pannel ?
LM3914 for GR metering ?

99% I will use for my unit black 3.16mm thickness PCB like in Mixbuzz500.
Copper writings never comes down like silkscreening.
LM3916 is for metering. 14/15/16 are same pin-out,
except: 3914 is lin scale, 3915 is log 3db per LED, and 3916 "mimics" analog meters.

Quote
hehehe, mine is almost finish , just need board, bom and parts  Tongue
there is some place nearly my mixbuzz500 and my future 51 DAOC.

after a good eq multiband will be fine

You superfast , French DIY team guys!!!!

Quote
I want one!
:)
Let's slow down and see what happens. I have to test it thoroughly first.
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Igor on July 20, 2010, 08:04:14 PM
A....Little spoiler :)
Or, sneak preview. I don't like those ALPS switches, they causing me
cognitive dissonance. Have to change them to toggles.
Except this. Measures are right. Nuff better than stare into new PCB's!

Well, have to do something with these ALPS switches.
Move some resistors-to get some space between the comp's!!!!
LL1524/1517 fits by dimensions, as well as API out clones bought from Hairball.
First class service.
Enough for today, testing-tomorrow!!!!

(http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/prew_main.jpg)

(http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/prew_fp.jpg)

http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/prew_contr_2.jpg

http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/prew_contr.jpg
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Ryake on July 20, 2010, 08:15:20 PM
 8) Looking good!
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Igor on July 20, 2010, 08:24:40 PM
In case of whatever. DOA sockets can be filled with 1176 amps or
almost every other DOA or even IC op-amp...
At all, people should have a choice, when building a project like this.
Title: Re: 1176 in 51x/500 format: almost there!
Post by: gemini86 on July 20, 2010, 11:06:13 PM
brilliant!
Title: Re: 1176 in 51x/500 format: almost there!
Post by: [silent:arts] on July 21, 2010, 03:23:26 AM
I don't like those ALPS switches, they causing me cognitive dissonance. Have to change them to toggles.
what's wrong with those switches?

Igor, would be nice if Jeffs DOA sockets would fit:
http://classicapi.com/catalog/product_info.php?cPath=71_77&products_id=122
Title: Re: 1176 in 51x/500 format: almost there!
Post by: zayance on July 21, 2010, 04:32:27 AM
Man you're fast....
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Igor on July 21, 2010, 06:51:56 AM
I don't like those ALPS switches, they causing me cognitive dissonance. Have to change them to toggles.
what's wrong with those switches?

Igor, would be nice if Jeffs DOA sockets would fit:
http://classicapi.com/catalog/product_info.php?cPath=71_77&products_id=122

ALPS switches: nothing wrong with them. Two reasons: caps and look.
I can't found round caps, 5...5.5 mm diameter.
Having both toggles and pushbutton switches at same small space...Dunno.
It can be good to replace ALPS switches with toggles, but have to source something really nice.

For now, DOA sockets from Farnell used, #149318
Drill diameter is 2mm. They have less height than Jeff's sockets as well.
If I change the drill to 2.35mm (closer standard drill size), Farnell sockets can't be used.
Title: Re: 1176 in 51x/500 format: almost there!
Post by: [silent:arts] on July 21, 2010, 07:10:24 AM
Igor, 5mm caps are DigiKey partNr EG1882-ND (http://dkc3.digikey.com/PDF/US2010/P2213.pdf)

it is a shame all those DOA sockets have different diameters for the same application ::)
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Igor on July 21, 2010, 07:23:57 AM
Hmmm.... I agree :)
Thanx for the link!!!!!
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Stagefright13 on July 21, 2010, 07:54:07 PM


Holy crap that's cool looking! What's next? A double width LA2A!!??

John
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Igor on July 21, 2010, 08:00:06 PM
Stay tuned :)
I love 51x format, and this inspires too much :)
More 51x stuff to come. Later.

/hmm....can't stay....well... More 51X-F76 PICTUREZZZZZ!!!!

(http://i251.photobucket.com/albums/gg291/diy33609/pcb_1.jpg)

(http://i251.photobucket.com/albums/gg291/diy33609/pcb3.jpg)

http://i251.photobucket.com/albums/gg291/diy33609/pcb4.jpg

http://i251.photobucket.com/albums/gg291/diy33609/pcb2.jpg
Title: Re: 1176 in 51x/500 format: almost there!
Post by: gemini86 on July 22, 2010, 02:16:34 AM
Stick with the small sockets, but keep the pads large so one could maybe ream out the hole just a little for Jeff's sockets?
Title: Re: 1176 in 51x/500 format: almost there!
Post by: RedNoise on July 22, 2010, 03:52:46 AM
Stick with the small sockets, but keep the pads large so one could maybe ream out the hole just a little for Jeff's sockets?

+1...
Title: Re: 1176 in 51x/500 format: almost there!
Post by: SIXTYNINER on July 22, 2010, 07:51:45 AM
....... 1 picture can say that billions of words cannot .

great project !

dear big "P.O.S."
 8)
Title: Re: 1176 in 51x/500 format: almost there!
Post by: gemini86 on August 04, 2010, 02:35:09 PM
[chant] Update! Update! Update! [/chant]
Title: Re: 1176 in 51x/500 format: almost there!
Post by: briomusic on August 04, 2010, 02:48:36 PM
Funny, I was just thinking about this project today. I really need an 1176, but it always seemed such an act with this huge case and pushbuttons and what have you. Feel like treating myself to a "kit" on this one.
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Igor on August 09, 2010, 08:32:19 PM
Yep. Got this running fine at +/-16, tested with 4 types of DOA's, still not get my 51x rack back from my friend who took it for session filled with pair of MixBuzz500.
For now: works fine; same compression like 1176; have to change
some mechanic stuff to fit everything bit better :)
Test results will be posted tomorrow, for now-some funny photos....

Album:

http://s251.photobucket.com/albums/gg291/diy33609/51F_X76/

(http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/v_1_0_b.jpg)

Title: Re: 1176 in 51x/500 format: almost there!
Post by: canidoit on August 09, 2010, 10:50:17 PM
Are you going to make different rev versions on this?

Looks pretty slick!

Will you be making a clean 500 series john hardy pre-amp or similar?
Title: Re: 1176 in 51x/500 format: almost there!
Post by: gemini86 on August 09, 2010, 11:26:36 PM
YAAAAY!!!
Title: Re: 1176 in 51x/500 format: almost there!
Post by: RedNoise on August 10, 2010, 01:56:52 AM
Pipe's back! ;D
Very nice looking front pannel , especialy the yellow & black dress code!
Title: Re: 1176 in 51x/500 format: almost there!
Post by: AudioGimmer on August 10, 2010, 02:59:20 AM
That is looking pretty cool.....

I'll start saving!!


AG
Title: Re: 1176 in 51x/500 format: almost there!
Post by: zayance on August 10, 2010, 03:45:26 AM
 8) 8) 8) 8)
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Tubemooley on August 10, 2010, 06:06:15 AM
You sick bastard. Very nice. Over in the photo album, who's DOA is that with the LED's? I want some of those. The one with the transistors wrapped in copper foil for thermal coupling. Schweet, schweet, schweet...... DW.
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Ryake on August 10, 2010, 08:27:05 AM
Nice Igor!
Title: Re: 1176 in 51x/500 format: almost there!
Post by: drumgod52 on August 10, 2010, 03:47:32 PM
Very very cool,  how soon can I get a couple?
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Neil on August 10, 2010, 04:48:13 PM
 :o  :o  :o

I'm in. When and how much?

Neil
Title: Re: 1176 in 51x/500 format: almost there!
Post by: Igor on August 10, 2010, 09:01:42 PM
Thanx Tubemooley!
I think "sick bastard" is same as ПадОнаГ in Russian :) Very pleased to hear!

Quote
who's DOA is that with the LED's? I want some of those. The one with the transistors wrapped in copper foil for thermal coupling.
Mine, 2SK389 at input, cascode topology, pretty hot, very fast, low open loop gain, high out current.
Same as used in La-Vi console (TanTan studios, Israel).

"I want one" : Please some patience. Let me test it and get rev.1.2 PCB's first.

F76 test results.

Still not get back my 51X rack.

Results seems to be close to real unit.
I checked with "original" 1176 amps which fits same DOA sockets,
and another power supply for +/-24V, today, the results seems close to what I got yesterday.

So than...

Input amp: OPA604
Output amp: my circuit.
AMPS: measured with what I had in-hand.
Nothing special as distortion and most of sound comes from distorting FET and trunny's.
Input transformer: O-12 clone, Altran C3837-1, from Hairball.
Input: 600 Ohm attenuator from Hairball.
Output transformer: Lundahl LL1524, output load 1Kohm, no Zobel network.

Supply: +/-16V
Current draw (compressor IN, output +10dB, 1.2KOhm coil DCR relays used): +62/-55 mA.

All measured in dBv to simplify math. 1dbV=1V RMS.
Some numbers of course will look better in dBm/600.

Audio part, no FET.

Freq responce:
1kHz 0db, 20Hz +0.3dB, 20Khz -0.2dB, 40kHz -0.8dB.

Noise: /WITHOUT ANY WEIGHTING FILTERS!
IN=min, input shorted, no signal source, OUT=max: -67dB.

S/N at input/output controls approx. at 14hr,
output signal 1db below clipping point: about 89dB.

Output clipping point: +25dB.

Max gain: 37dB.

Distortion at +10dB out:
20hZ 0.18%, 1kHz 0.01%, 10k 0.008%.

With FET inserted, BIAS adjusted for -1.0 db.

Distortion after adjustment
(1kHz, input some db's before compression starts): 0.04%
Can be adjusted for more, of course.

Ratio measurement. Input adjusted for 2db gain reduction at
-10 db of analyzer's out; compressor's out ref'd to zero.
Than, analyzer's output raised to 0db and +10 db, compressor's out measured.

Ratio:2
In -10db Out Ref.0db
In   0db Out Ref.+4.6db
In +10db Out Ref.+7.7db


Ratio:4
In -10db Out Ref.0db
In   0db Out Ref.+3.2db
In +10db Out Ref.+5.3db


Ratio:8
In -10db Out Ref.0db
In   0db Out Ref.+1.5db
In +10db Out Ref.+2.5db


Ratio:12
In -10db Out Ref.0db
In   0db Out Ref.+0.8db
In +10db Out Ref.+1.5db


Ratio:20
In -10db Out Ref.0db
In   0db Out Ref.+0.45db
In +10db Out Ref.+0.85db

SLAM:
In -10db Out Ref.0db
In   0db Out Ref.+0.8db
In +10db Out Ref.+1.7db
Distortion raised, of course:)

Etc.

Will post more info when get back my 51X rack.
Update: will test in studio, inside 51x rack, this weekend.
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Igor on August 15, 2010, 08:51:25 AM
Update.
Best news: SOUNDS GOOD!
Was compared to black face original unit, IMHO rev.F.
Same character of compression.
Objectively, F76 distorted a bit less and had bit less hiss.
/hehe, all this is easy to fix :)
I liked the bottom end with Altran O-12 clone, 600 Ohm T-pad and Lundhall1524 out
more than original unit.
The rest is crispy punchy sound talks I hate.

Changing some misc things on front panel, PCB rev.1.2 is ready,
testing again and it is here.

Is there some interest in 51X F76 PCB sets? Metal works (bracket)?
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: zayance on August 15, 2010, 09:00:44 AM
 8) 8), I'm in for two, bracket yes, i don't think we need metal cover for this ::)

Edit, yes as Audiogimmer, frontpanel standoffs etc... could be cool less things to do on our sides, and the faster we can use it  :)
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: AudioGimmer on August 15, 2010, 09:08:34 AM
Hey Igor.

I think something like your mixbuzz kit would be good, i.e. PCBs and all metalwork/front panel/brackets/standoffs etc.
It's the same dimensions for lunchbox and 51x racks isn't it?

The sweet part about the mix buzz was the accuracy of the metalwork & front panel etc. [All the stuff I'm not good at!]

AG
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: RedNoise on August 15, 2010, 11:12:41 AM
Very good news!!I'm in for two pcb+metalwork+standoffs (like the buzz in fact)
cheers!
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: ultra-alex on August 15, 2010, 11:16:12 AM
...
Is there some interest in 51X F76 PCB sets? Metal works (bracket)?

there is. ;D
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: briomusic on August 15, 2010, 12:14:34 PM
I'd be in for one-two kits depending on price. I like the way peter purpose puts his kits together, pcb, metalwork and all the fiddly stuff (i.e. the only one model of toggle switch that will fit, etc).
I prefer to chose and order my own resistors, caps etc.
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Igor on August 15, 2010, 03:32:31 PM
That's good idea, to supply kits with all "hard to get" stuff.
One thing is, there are three of Grayhill switches, they aren't cheap
(Digikey shows about $18, but no stock, availability-October (!)
other sources are more costy (I bought now at Farnell, about $25/switch).
Actually, only one 2x6 switch is must, two 1x12 switches can be replaced with pots,
but what I thought, is, if get to 30-50 orders at least, the price drops significantly.
I cannot supply resistors/transistors/capacitors with kits, but things like
LM3916, FET's, especially when somebody needs matched stereo pair,
Grayhill switches, toggle switches, etc, easy. We even can work out a deal on
LL1524 transformers etc.

For guys who want it for real cheap, there's another option:
front panel PCB which fits into 1RU and possibility to use analog meters!
This way, 2 compressors can fit into 1RU. IMHO cool alternative to dist**sor...
taking into account output transformers and discrete stages :)

Cool than....write here, will try to do my best.
Without killing my brain with too much stuff, of course :)
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: AudioGimmer on August 15, 2010, 04:30:54 PM
Igor

I think offer a package with all the Grayhills and matched components [maybe trafos too?] where appropriate. People can choose to make a top of the line version with this kit, or a more home brewed version with pots and self matched components. I think enough people would be in for the Grayhills  to make it cost effective as a group buy.

Mind you, a 1U 2 channel version sounds pretty sweet too.

Decisions decisions.....  ;)

AG
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: briomusic on August 15, 2010, 04:43:38 PM
just to add, obviously it is always possible for 3rd party shops to offer component kits, like slenderchap does for PP EQN or ptownkid for the 51xPSU. this is what I love about the bustling markets of prodigy village  ;D ;D
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Neil on August 15, 2010, 04:47:23 PM
That's good idea, to supply kits with all "hard to get" stuff.
...
Cool than....write here, will try to do my best.
Without killing my brain with too much stuff, of course :)


Kits with "hard to get" stuff sounds great! If you can get a deal on transformers that's good too, but probably not necessary. Caps and resistors I'd say definitely not necessary, since most probably have spares lying around to use from other projects.

Thanks Igor!

And definitely don't do anything to kill that brain!  ;)
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: ultra-alex on August 15, 2010, 05:09:21 PM
just to add, obviously it is always possible for 3rd party shops to offer component kits, like slenderchap does for PP EQN or ptownkid for the 51xPSU. this is what I love about the bustling markets of prodigy village  ;D ;D

very good idea, brio! maybe we can even swap the lars lundahl with a carnhill...  ;D
just kidding.  ;)
cheers, alex
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Ryake on August 15, 2010, 06:03:09 PM
I'm in for one kit similar to the MixBuzz. Also would be interested in the group buy for some of the more expensive parts.
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: jandoste on August 15, 2010, 06:05:36 PM

alternative to dist**sor...


I'm in !
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Baltimore on August 15, 2010, 07:10:39 PM
Im in for 2 pcb/metal/hard to get stuff.
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: bigswole on August 15, 2010, 08:23:58 PM
i'd love to have 2 that fit into a 1ru space
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: stereokillah on August 16, 2010, 11:32:11 AM
i'll combine with rednoise for two with hard compenets if i've got the fund when it's ready
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: AudioGimmer on August 16, 2010, 11:39:48 AM
In case I wasn't clear, I'd be in for 1 or 2 depending on price.....

Not going to race Stereokillah to assemble them tho: that guy is FAST!!    ;D ;D


The Gimmer
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: drumgod52 on August 17, 2010, 03:36:57 AM
put me down for 2 with grayhills etc.
Would like to have a good matching pair.
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: AP carrier on August 19, 2010, 10:35:17 AM
I'd be sure in for one. PCB, metalwork and hard bits, if your selling this way.

Thanks,
Andrew
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: joe-electro on August 19, 2010, 01:44:51 PM
I hope this isn't a stupid question or one that's been answered before, but I just had to ask. The original 1176 circuitry is essentally single-ended class A (or partially class AB, starting with Rev F) design with a +30V rail for the audio amplifier and a -10V rail for the FET control voltage. Are you somehow converting the +/-16 from the 500 rack's power supply to these voltages or is your circuit primarily a bipolar design?  If it's the latter, isn't it a bit of a stretch to call it an 1176?

Thanks,

Joe
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Igor on August 19, 2010, 06:20:53 PM
Long one :)
Smoked whole pipe filled with great Virginia when typed :)

Quote
I hope this isn't a stupid question or one that's been answered before, but I just had to ask. The original 1176 circuitry is essentally single-ended class A (or partially class AB, starting with Rev F) design with a +30V rail for the audio amplifier and a -10V rail for the FET control voltage.

I don't pretend to be final instance, but yes, there are about 300 original 1176's in the world,
which have both input and output stage running in class A. The rest using class AB output stage
and most of "original" 1176 using IC balancing circuit at the input. It is statistic :)

-10V deliver from -16V rail, there's LM337 regulator on board, dedicated for this purpose.

51X F76 has same gain reduction circuit, same gain structure, as 1176 rev.F;
it can be built with input transformer and 600 Ohm T-pad, or input IC+pot;
F76 has at least 5 options for output transformer, 2 options for input transformer,
tens of options for amplifiers.... etc.
"Original" amps, from rev.F and later, can be used here and they running OK
on +24V.
"Original" 1176 amps can be used only in case your rack has +/-24V, i.e. it is 51X.
"Input" (first) amplifier in my version has additional output current source (load)
to get more output swing from single +24V than "original" do at +30.
Input amp can run BTW without current source, if somebody feel it closer to "original".
Please refer to schematic:
http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/IN_AMP.png
Q101, R101, R102, D1, D2
R17 lowered a bit btw. So....yes, it is "original", more or less.

I recommend kinda 2520 or Forssell DOA at output stage for more headroom
and "sound" :)

IMHO: sound of 1176 does not come from amplifiers itself only.

Most part of sound is FET distortion and distortion of output transformer.
You know very well FET compressor built on same principle with kinda digital control, transformerless
and chip-based, received excellent reviews. It is...more or less conclusive evidence of above theory :)

Now, without pretending to be closed on "original"1176.
Imagine compressor based on 1176 principle, same compression and distortion coming from FET.
Now, let it run with API output stage! I mean 2520 discrete op-amp and 2503 output trafo.
It has more funny coloration IMHO. Or, use here Forssell FET op-amp and Lundhall trafo.
This way, we can run output stage on +/-16 V (it is 2V more headroom than "original")
and even more if we use 51X rack with +/-24V!  

Quote
Are you somehow converting the +/-15 from the 500 rack's power supply to these voltages or is your circuit primarily a bipolar design?  

I used "bipolar" design. +/-16 is more then single 30.
"Original" amps can run at single +24V. I'd use input "original" stage on single +24 and not
original Forssell FET opamp running on +/-24, have a fun of "original" compression
and more headroom, call it F76 and very happy with this.
As well, OPA604 adapter board can go for "input" (gain reduction) amp on +/-16V.
For those who want to learn how it works, it is good point to try different amps etc,
and it can be way easier build compared to 1176 clones.

Quote
If it's the latter, isn't it a bit of a stretch to call it an 1176?

Up to you :)

I have a friend who know one thing: ORIGINAL N*VE. He selling kinda 1272's.
Now, the fun is, when 1166 trunny's disappeared, he started to use choke+class AB trunny.
At this point, his pre's are not original, but, he told me choke+class B trunny sound better than 1166.
Very important argument. At the moment it was impossible to buy 10468's, he
started to use round line inputs connected with half of windings. It sounded of course better,
real improvement to original design. But, he call these pre's "original as possible".
This brought as real "bit of a stretch" example.

I am not pretending to clone 1:1 existing circuit. It is illegal :)

Wanna 1176-buy old, rev.A...E, neither clone nor reissue.
It always raise customer's rating of studio.

From the other side. I built discrete, full-format console for TanTan Studios.
(Google: tan tan studios Israel).
IMHO it is great console, fully discrete except EQ filters (OPA2604),
loaded with best possible trunnies etc etc.
One-toggle to change passive or active main summing bus, passive relay-based monitor controller.....
Aran have to stock a pair of SSL6000 channels for this so-called customer rating as well as U87..
Not many people BTW know what is ELA-M251 :)

F76 built to be great sounding FET compressor with more options,
same compression character and possibility to be faster/slower/darker/whatever
up my or your taste when you build it, as me/you like it for the studio where F76 will work.
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: joe-electro on August 19, 2010, 07:24:25 PM
Thanks for the clarifications!

Joe
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: gemini86 on August 20, 2010, 02:58:50 AM
Igor, I may have missed it earlier, are you offering the original amps in a footprint that will work in the f76?
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Ryake on August 20, 2010, 09:23:04 AM
You're the man Igor! Using the 2520 and 2503 Api stuff for the output stage sounds very interesting  ;D
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Igor on August 21, 2010, 03:00:56 PM
Quote
are you offering the original amps in a footprint that will work in the f76?
Yes, they laid out in DOA format and coming with set of pcb's, as well as other set of amps...
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: haima on August 23, 2010, 10:55:29 PM
as usual - you are a machine igor!  ;D

i'm interested in a pair when they are ready, with any hard to get/matched parts... grayhills etc.

thanks mate!
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: damnyankee on August 24, 2010, 03:30:44 PM
Igor,

All I can say is WOW!  :o

Your work is first class and you are a true electronics artisan!

DY
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: drumgod52 on September 01, 2010, 02:52:18 AM
Are these almost ready?
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: AudioGimmer on September 01, 2010, 06:56:40 AM
Hey drumgod52, slow down.

It's like fine wine, you can't rush these things.....


AG
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Igor on September 01, 2010, 10:05:56 PM
Haha! This weekend, btw, we enjoyed in good company with friends
with 2 bottles of Chateau Golan 2003, kinda barbecue
("Shishlik" in rum+lemon+sweet chili marinade, my invention), and,
of course, there was some Rock-four locally made cheese.
I hope F76 will have same good sound! Still no news, last version proto PCB's
are on the way....the rest is stuffing, checking, studio test again,
time-frame for release....mid'September-first half of October.
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: haima on September 02, 2010, 04:11:06 AM
good news igor!
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: desun on October 05, 2010, 11:02:55 AM
Any more news on this Igor? I know you've been a busy guy, but this one looks fantastic! :)
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: bugfight on October 08, 2010, 12:14:14 AM
mmmm sounds great, in for 2 partial kits
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: babyhead on October 08, 2010, 05:17:34 AM
Chateau Golan?  <3 Israel.

BTW, Santa Isreal.
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: kepeb on October 08, 2010, 06:13:16 AM
Any more news on this Igor?
yer, still watching patiently :)
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: drumgod52 on October 15, 2010, 06:06:45 PM
No updates since September 1st....any news Igor?
Thanks,
Steve
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: haima on October 15, 2010, 06:15:13 PM
igor's been a bit under the weather - working too hard i think! but i think he's getting back on this project soon.

check his white market thread, he posted there recently with an update.
Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Igor on October 17, 2010, 12:45:01 PM
OK.......

PictureZ:

(http://i251.photobucket.com/albums/gg291/diy33609/51F_X76/F76_V21.jpg)

Porn-image-set:
http://s251.photobucket.com/albums/gg291/diy33609/51F_X76/

There will be 2 options:
PCB set (moderate priced, for those who want cheap version or their own fronts etc)
Full kits (everything is inside, metal works, front panel, Grayhill switches, etc).
Full kits will not include input/output transformers and 600 Ohm T-pad,
the reason is many people/many options).

PCB set contains: motherboard, ratio/attack/release boards for both 500 and 1RU versions,
5 different mini-boards for amplifiers including my vision of input amplifier
(IMHO, the best sounding option here), i.e. all boards needed for this build.

Download the docs meanwhile!

http://twin-x.com/groupdiy/thumbnails.php?album=417

Title: Re: 1176 in 51x/500 format: GETTING CLOSER!!!!!
Post by: Igor on October 17, 2010, 01:52:18 PM
I think, it is right time to add word FEELER to this thread.

PCB sets will be priced USD80, shipping included.

Full kits (pcb'+all parts, incl. Grayhill switches, ELMA knobs,
fronts, aluminium brackets, everything needed for this build, HI-FI version,
except transformers and 600 Ohm T-pad):
USD450 incl. shipping, if we have more than 10 orders.

We have 8 compressors pre-ordered now, and seems we will issue F76 as commercial unit.
So.....all parts in-stock!

Shipping discount USD12 for second kit, USD10 for every additional kit.
If you order 2 kits, I can put matched FET's without charge, just write this.

Shipping discount on every additional PCB set is USD5.

Time frame: pre-ordering till Nov 20th, shipping- you will receive
PCB's and kits before Dec 20th (Christmass build :)

You can add your name till Nov 20th.

Here is the list:

Igor 8 kits at least
Zayance 2pcb's
Loopermc5 2 kits
bluesbaz 2 kits
Meathands 2 kits
RedNoise 1 kit
AP carrier 1 kit
briomusic 2 pcb sets
antfoodw 1(2) kit(s)--please specify :)


Anyway, we have a time till 20th November, you can add your name or modify the order.
Just write it in this thread
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: zayance on October 17, 2010, 02:35:02 PM
2 PCB sets please, but is it possible to include metal Bracket and Frontpanel? If yes what would be the price. Thanks
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on October 17, 2010, 03:06:10 PM
Quote
2 PCB sets please, but is it possible to include metal Bracket and Frontpanel?
Not worth it, IMHO.
Minimum price for PCB+bracket+front panel should in range $175.
I have 8 orders for F76 (built units) for now, ordering the stock, and kit's price calculated
by the way it is cheaper than ordering from 3 suppliers, shipping, etc.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: zayance on October 17, 2010, 03:17:03 PM
Quote
2 PCB sets please, but is it possible to include metal Bracket and Frontpanel?
Not worth it, IMHO.
Minimum price for PCB+bracket+front panel should in range $175.
I have 8 orders for F76 (built units) for now, ordering the stock, and kit's price calculated
by the way it is cheaper than ordering from 3 suppliers, shipping, etc.

Yes i know it's always cheaper in full kit, but i have most of the components in spare, most of them not all that's why i'm asking for PCB set, and it allows me to order when i want to build it, but i have until 20th November so i'll think about it and change if so...
Now if i stay with PCB set, then concerning faceplate, bracket is available from Volker that i know, and i'm sure you will give CDR, now i'm wondering if drilling the holes nicely will be a Pita, get me thinking, anyway for now put me down for 2x PCB set, i'll change if needed.
Thanks a lot.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on October 17, 2010, 03:26:53 PM
Yes, of course, if somebody interested in front panel cdr's- will post them.

Meanwhile, we worked out the combined shipping deal on Lundahl output transformers with
Andre TchMil....
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: andre tchmil on October 17, 2010, 04:05:41 PM
Yes, of course, if somebody interested in front panel cdr's- will post them.

Meanwhile, we worked out the combined shipping deal on Lundahl output transformers with
Andre TchMil....

That's right. I can offer Lundahl LL1524, used ones but very good cosmetic condition.
Price is 50 euro /pair. Shipping goes with the kits from Igor's place, so you save on extra ship costs.

You can email me for ordering at [email protected]
Put LL1524 in the subject.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: zayance on October 17, 2010, 04:19:44 PM
Quote
Yes, of course, if somebody interested in front panel cdr's- will post them.

I'd like to have it if it's possible, maybe you can add them to the GroupDiy docs? Thanks again Igor for this project....
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on October 17, 2010, 05:41:13 PM
Added, updated...
/I mean, cdr's and list, both of them :)
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: haima on October 17, 2010, 08:11:41 PM
hey igor - looks great!

what output transformer options are there? i searched the thread, but couldn't see details about this.

obviously there's the lundahl option, but does it also fit one of the ed anderson's API style output transformers, available from jeff @ classic api?

http://classicapi.com/catalog/index.php?cPath=21_37 (http://classicapi.com/catalog/index.php?cPath=21_37)

i.e. EA 2503 or EA 2623-1?
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: zayance on October 17, 2010, 09:13:30 PM
hey igor - looks great!

what output transformer options are there? i searched the thread, but couldn't see details about this.

obviously there's the lundahl option, but does it also fit one of the ed anderson's API style output transformers, available from jeff @ classic api?

http://classicapi.com/catalog/index.php?cPath=21_37 (http://classicapi.com/catalog/index.php?cPath=21_37)

i.e. EA 2503 or EA 2623-1?

On the Motherboard BOM it says:

OUTPUT TRANSFORMER:
1   LL1524(1517), API OUTPUT, ETC               T1  

I took it as a yes.

Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: haima on October 17, 2010, 09:18:18 PM
thanks zayance - i thought so...

i have some old profile API output transformers - ideally i'd use them rather than spending more $$...  ;)
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: bluesbaz on October 17, 2010, 09:48:44 PM
two full kits please.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Peterson Goodwyn on October 17, 2010, 10:47:22 PM
Two full kits here as well, please.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: RedNoise on October 18, 2010, 11:53:41 AM
Hi Igor , please count me in for two pcb+metalwork .
Many thanks.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: AP carrier on October 20, 2010, 11:44:52 PM
Hi Igor,

One full kit for me please.

Thanks,
Andrew
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: briomusic on October 21, 2010, 04:15:40 AM
Hi Igor,
two pcb sets for me please  :)
cheers
Briomusic
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: antfoodw on October 21, 2010, 10:11:14 AM
Hi Igor,

Thanks for doing this.   I'm definitely in for one full kit and probably two with matched fets if finances allow...
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: RedNoise on October 21, 2010, 10:22:52 AM
Hi Igor , if possible , I'll go with one full kit only.Many thanks.
T : positivity dealer!Ahahahaa!
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: edanderson on October 21, 2010, 01:58:48 PM
a lot of good options for output transformers if there is a pinout for LL1517 and a cutout for API 2503 size... cinemag, jensen, sowter all have catalog offerings that will fit that cutout.  then there's the 2503 from classicapi, the mini 1166 from hairball, and soon the same b11148 output used in the 1176 rev F will be available for peter purpose's la3a 500 module -- that should fit this PCB and have the original 1176 flavor.

ed
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: zayance on October 21, 2010, 02:04:55 PM
a lot of good options for output transformers if there is a pinout for LL1517 and a cutout for API 2503 size... cinemag, jensen, sowter all have catalog offerings that will fit that cutout.  then there's the 2503 from classicapi, the mini 1166 from hairball, and soon the same b11148 output used in the 1176 rev F will be available for peter purpose's la3a 500 module -- that should fit this PCB and have the original 1176 flavor.

ed
8) 8) what else?  ;D ;D ;D
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: RedNoise on October 21, 2010, 02:09:14 PM
a lot of good options for output transformers if there is a pinout for LL1517 and a cutout for API 2503 size... cinemag, jensen, sowter all have catalog offerings that will fit that cutout.  then there's the 2503 from classicapi, the mini 1166 from hairball, and soon the same b11148 output used in the 1176 rev F will be available for peter purpose's la3a 500 module -- that should fit this PCB and have the original 1176 flavor.

ed
8) 8) what else?  ;D ;D ;D


a nice expresso ??
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: zayance on October 21, 2010, 02:10:20 PM
a lot of good options for output transformers if there is a pinout for LL1517 and a cutout for API 2503 size... cinemag, jensen, sowter all have catalog offerings that will fit that cutout.  then there's the 2503 from classicapi, the mini 1166 from hairball, and soon the same b11148 output used in the 1176 rev F will be available for peter purpose's la3a 500 module -- that should fit this PCB and have the original 1176 flavor.

ed
8) 8) what else?  ;D ;D ;D



a nice expresso ??

Of course
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on October 24, 2010, 08:07:10 PM
I updated page 5, please check if everything is correct.
Thanx to Ed Anderson for output transformers options.
I will be happy to try here b11148 from Hairball Audio as well.

Regarding the T-pads, input and output transformer options.
Hairball Audio has an excellent service, I recommend them for input transformers and T-pads.
My personal choice was LL1524, I liked the sound.
However, API output clones can sound great with API-kinda DOA here.
It is all up to your taste.

I will post very soon the front panel design for 1RU stereo unit.
IMHO, for people who need great sounding stereo FET compressor in 1RU...
this is really cool option.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on November 08, 2010, 05:16:02 PM
OK....
Ready?
I ordered 40 PCB's today!
It is OK to pay for pre-orders.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: kepeb on November 08, 2010, 06:05:21 PM
you still going up till the 20th nov to get orders in or is 40 the limit?
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on November 08, 2010, 06:09:58 PM
I think F76 PCB's will be available, like CRM or 2254C, at my ordering thread;
by the reason we make some units and want to keep part's cost low,
we will offer the full parts kits at this time, later-really, dunno.
20th Nov is a break for kits orders.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: loopermc5 on November 08, 2010, 06:15:17 PM
OK....
Ready?
I ordered 40 PCB's today!
It is OK to pay for pre-orders.
It's ok to wait till the 20th to pay still?
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Jartu on November 13, 2010, 06:13:37 AM
Hi Igor!

Two matched units for me pleasee!!

Cheers!
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: culteousness1 on November 15, 2010, 03:38:24 PM
Hey Igor!

I'm in for two pcb sets.

greetings from cologne,
culteousness
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: 3nity on November 15, 2010, 11:02:22 PM
Igor is that panel made out of pcbs??
I used to work at a pcb manufacturer we use to do panels like that for instrumentation panels.
Nice idea?
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: JBVries on November 16, 2010, 12:57:34 AM
2 kits here
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: andre tchmil on November 16, 2010, 05:41:05 AM
Still some 1524 Iron left.
According to mastermind Igor perfect for these kits. 8)
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: RedNoise on November 16, 2010, 05:50:58 AM
emailed! ;D
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: AudioGimmer on November 19, 2010, 08:51:01 AM
Ok. Been sorting finances.

Igor in for 2 full kits w. matched FETs please.

@ andre tchmil do you have 2 1524 output trannies available still? I'd take 'em


The Gimmer
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: andre tchmil on November 19, 2010, 09:34:42 AM
Ok. Been sorting finances.

Igor in for 2 full kits w. matched FETs please.

@ andre tchmil do you have 2 1524 output trannies available still? I'd take 'em


The Gimmer


sure how many kilograms do you need ?  ;D

email me for ordering, thanks
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: wowi on November 21, 2010, 08:07:26 AM
sh*t, i've missed the 20th. I am in for 1 full kit if it's still possible  :(

Wolfgang
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on November 22, 2010, 03:59:54 PM
Still OK. We busy with work, btw, come make music here:
http://www.facebook.com/pages/Tel-Aviv/DB-Music-Studios/157025280987856

If you don't have a phazebuk, don't create an account, it is [email protected]@ng time consumer;
re-newed DB official website will be available soon.

Back to F76...

I ordered 50 nice PCB sets. They will be ready next week.

It is OK to make pre-orders till 1st December, the date we will oder the parts for kits and
PCB's will be ready to ship.

It is OK to pay for kits/PCB's.

Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on December 09, 2010, 02:45:12 PM
PCB's arrived, stuffed, checking now!
PCB orders will be shipped very soon, regarding the kit,
there may be delay due to Grayhill switches and metal brackets,
I will do my best to ship them before Jan 15th.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: chunger on December 12, 2010, 03:41:34 PM
payment sent for 2 full kits.  Matched FET's please.  Also contacted Andre for Lundahl output transformer option to ship with kit.

Thanks!
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: culteousness1 on February 03, 2011, 02:54:28 PM
Since there is no support thread yet, I will post my question here:

Anyone sourcing parts yet? I am not quite sure which T-Pad is the right one  :-\.

Thanks for your advice!
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Carlos Lima on February 04, 2011, 11:22:14 AM
Being late onboard. Igor, any chance still for 2 kits?

Thanks.

Carlos Lima
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on February 23, 2011, 08:35:23 AM
We almost ready to ship, I passed on every part of every kit, flat top yellow led's, caps for ELMA knobs and FDH333 diodes were missing;
they already ordered and should arrive at Mar 1st.
To be at safe side, shipping at first decade of March.

Sorry for delay.

We arranged another 5 kits from parts we had in stock, if there are people interested-mail me about this.
Support thread will be started this week.
Title: Re: 1176 in 51x/500 format: FEELER. Goto page 5 for pre-orders.
Post by: Igor on February 28, 2011, 07:41:20 AM
Kits shipping: within few days!!!!!! Sorry for delay.

Support thread:

http://www.groupdiy.com/index.php?topic=43338.0