[silent:arts]

« Last Edit: December 16, 2012, 11:40:43 AM by [silent:arts] »


TomWaterman

D-AOC PCBs - the building and help Thread
« Reply #1 on: February 26, 2008, 03:26:34 PM »
Awesome how does this sucker sound? LA2A-ish?

-T

crisotop

D-AOC PCBs - the building and help Thread
« Reply #2 on: February 26, 2008, 04:09:06 PM »
many thanks for all your effort volker, and of course analag for the original idea and concept!

cheers
christoph

matta

D-AOC PCBs - the building and help Thread
« Reply #3 on: February 26, 2008, 04:41:23 PM »
Hey Volker,

Good call on this  :thumb:  

Can you add the Edcor Transformer models you used here for others to see and if you used an off the shelf power transformer, which one?

From what I gather based on the schematics you need 3 secondary windings.

Sec 1 = 220 - 250VAC 0.1A
Sec 2 = 9VAC 2.5A
Sec 3 = 9 -24VAC

Cheers

Matt
Matt Allison
www.matt-allison.com

Quote
We are not going to start thinking of ways to get an octopus to commit a crime, cause that just has failure written all over it – Earl J Hickey

[silent:arts]

D-AOC PCBs - the building and help Thread
« Reply #4 on: February 26, 2008, 05:04:53 PM »
Matt,

you will get all this information before the group buy closes, and some more.
I just don't have the time post all information in one day.

Audio Transformers (I will post measurements of different transformers when I'm finished with it).

Bernd and I have Edcor XMS10K/600 at the output with no problems.
they have a slight rise in the Highs when measured, shouldn't be bad or can be tamed with termination.

the Input will have to wait at the moment, but it looks like nearly any 1:1 transformer can be used. waiting for Edcor WMS 10K:10K at the moment to proceed.

for the prototype I used a custom wound 250V 0.1A; 9V 2.5A, 24V0.5A transformer (since I used 24V relays).
I wont mention the manufactur now, since I had a phone call from him today where he asked why he gets so many "custom wound" transformer orders from all over europe with the same specs I used and all mention some forums (and I think Klaus doesn't know what this is).
I can understand his point, he is not very happy to wind the same transformer every third day and ship it individually.
berndbrue / me are working on this right now, either we should do a group buy for this transformer, or finding a shop willing to stock them.

PLEASE: anybody knows my transformer winder, DO NOT order a single transformer for this project there now. we don't want to loose this source. we will find a solution.

Will try to find time to do the PSU and power transformer instruction tomorrow,
thanks

matta

D-AOC PCBs - the building and help Thread
« Reply #5 on: February 26, 2008, 05:12:21 PM »
Hey Volker,

Totally understandable. I for one would LOVE to see a group buy on many of these things including the transformers. WIMA's are also hard to get here so maybe we can source some kind of Group buy on those as well.... hmm the possibilities are endless, LOL!

Thanks again for all the effort and to Analag for gifting us with a cool new 'none clone' project!

Cheers

Matt
Matt Allison
www.matt-allison.com

Quote
We are not going to start thinking of ways to get an octopus to commit a crime, cause that just has failure written all over it – Earl J Hickey

lofi

D-AOC PCBs - the building and help Thread
« Reply #6 on: February 26, 2008, 05:15:50 PM »
has Tat done a case for this yet? :wink:  hint
Are you professionally stupid, or just a gifted amateur.

Iain Westland (UK)


[silent:arts]

D-AOC PCBs - the building and help Thread
« Reply #7 on: February 26, 2008, 05:27:34 PM »
Quote from: "matta"
WIMA's are also hard to get here so maybe we can source some kind of Group buy on those as well....

the PCB is not limited to Wimas, even it was designed for Wima MKP4.
but kubi treated me a long time to put in more footprints ...
(drilling count increased a lot since he was involved)

bernbrue

D-AOC PCBs - the building and help Thread
« Reply #8 on: February 26, 2008, 06:13:45 PM »
Hi mates,
before I report about my first experience with this tube compressor I would like to point out a few things:

- this is a very "open", not profit oriented project, it would be a real pity, if this was ripped off or commercialized in any way
- it´s not a clone of an already existing compressor
- we would like to encourage you to DIY (including case and frontpanel design), since projects like this one becoming quite rare nowadays. So let creativity take its course
- Analag provided a very unique and fascinating schematic and got the ball rolling more than a year ago. Volker spend much time in designing the pcb and will have a lot of work and hassle to provide you with the pcb.
- Kubi supported Volker with suggestions and improvement

Volker was so kind to send me a prototype pcb of Analags Opto Compressor for beta testing. I suppose that this came to his mind: When a guy like me, a musician with such a limited knowledge in electronics can built this compressor, than everybody can do it. (foolproof so to say) :grin:

The pcb
well, it´s in blue, my favourite color. It was a real pleasure to stuff this board. The component placement is an amazing artwork, there are footprints for capacitors with different spacings and size, so it´s very difficult to find WIMAS that do not fit. You´ll enjoy it.

The building process
very straight forward, besides vactrols and Solen Fast Caps mostly easy to get standard parts. I haven´t paid all the bills yet, but my subjective impression is that overall costs a very low for a tube project

Sound
first impression: very subtile, unobtrusive compression, you won´t get it slamming


I talk to much, here are some pictures:

 





more to come later

regards
Bernd

lofi

D-AOC PCBs - the building and help Thread
« Reply #9 on: February 26, 2008, 06:24:10 PM »
Quote from: "bernbrue"

- we would like to encourage you to DIY (including case and frontpanel design), since projects like this one becoming quite rare nowadays. So let creativity take its course


is this me being told off? :grin:

I understand what you mean about creativity, but in the UK this cost lots. I can get a full case plus front panel from Tat for cheaper than i can get a local guy to make a front panel.

thats one pretty build you have there sir!! and am very pleased to hear that this will be subtle rather than smashing compression.

Thanks to everybody who has worked on this!!!!!

Iain
Are you professionally stupid, or just a gifted amateur.

Iain Westland (UK)



mcfarlane_audio

D-AOC PCBs - the building and help Thread
« Reply #10 on: February 27, 2008, 02:41:23 AM »
im thinking about sending edcor in the states an email about the custom power xfmr, they sent me a sweet one for my federal vari mu project, should i hold off? do you have something clever on the way?
Quote from: "pucho812"
yeah some guy named OHM invented this law which dictates all the crap we do

[silent:arts]

D-AOC PCBs - the building and help Thread
« Reply #11 on: February 27, 2008, 03:06:51 AM »
no problem with Edcors if you want to organize something :thumb:
if they are 115 + 115 on the primary Tony could sell some in Europe for sure.

D-AOC PCBs - the building and help Thread
« Reply #12 on: February 28, 2008, 10:27:11 AM »
Sorry if this is a bit premature but just scouting around to see whats available,

Does any one have a UK / EU source for the regulators?

LM350T & TL783?

or are their equivalents we can use?

also would MKS4  Polyethylene-terephthalate Wima Caps be ok, instead of the MKP4  Polypropylene ?

looking forward to this one!

cheers

Godders

D-AOC PCBs - the building and help Thread
« Reply #13 on: February 28, 2008, 05:24:36 PM »
RS has both of those regulators.

Cheers

Nick

Nele

D-AOC PCBs - the building and help Thread
« Reply #14 on: February 28, 2008, 05:27:49 PM »
ditto farnell.
c

D-AOC PCBs - the building and help Thread
« Reply #15 on: February 29, 2008, 02:07:19 AM »
really! i searched and it said 'special order', meaning they come from the states...ill check again..

not much sleep lately...sorry..

Godders

D-AOC PCBs - the building and help Thread
« Reply #16 on: February 29, 2008, 07:09:53 AM »
LM350T – P/N 267-9917 (RS)
TL783 – P/N 9594582 (farnell)

RS only sells the TL783 in tubes of 50.

Cheers

Nick

peterc

D-AOC PCBs - the building and help Thread
« Reply #17 on: February 29, 2008, 07:45:38 AM »
Member here Maxwall has Tl 783 at a good price.

Peter
If opportunity doesn't knock, build a door.

bernbrue

D-AOC PCBs - the building and help Thread
« Reply #18 on: February 29, 2008, 08:29:48 AM »
Hi,
I just wanted to mention that I sucessfully tested a simple 250uA Amperemeter with the D-AOC. Basicly it works, though the tracking in comparision to a sifam AL29 is not very convincing. Volker tested a 1mA meter, but the needle barely moves. Anyway, I recommend to test various meters, before buying quite expensive VU meters.
regards
Bernd

[silent:arts]

D-AOC PCBs - the building and help Thread
« Reply #19 on: February 29, 2008, 02:20:42 PM »
thanks Bernd,
will write something about metering in the future.

for a first start something about the PSUs:


 

Related Topics

  Subject / Started by Replies Last post
11 Replies
2860 Views
Last post November 28, 2008, 04:25:43 AM
by [silent:arts]
25 Replies
7151 Views
Last post August 10, 2011, 10:10:47 PM
by JimiH
5 Replies
1914 Views
Last post December 10, 2009, 05:43:37 PM
by Junction
4 Replies
432 Views
Last post August 13, 2018, 10:11:57 PM
by TDM