D-AOC PCBs - the building and help Thread

[[silent:arts]]

Do you have the layout for the Haufe trafo pcb you have in your unit? I have some 255/1 I want to use..

well, it is an original Neumann PCB, very easy. I can mail you a photo.
I thought of doing a run sometime, they are very handy.

 

[Soeren_DK]

That would help me a lot... Thanks 

niehans (At-Zeichen) gmail (Punkt) com

Cheers
Soren

 

[Soeren_DK]

Do you have the layout for the Haufe trafo pcb you have in your unit? I have some 255/1 I want to use..

well, it is an original Neumann PCB, very easy. I can mail you a photo.
I thought of doing a run sometime, they are very handy.

Thanks for the picture.. ;-)
I made a quick PCB layout. Is the wiring correct?

Cheers
Soren

 

[[silent:arts]]

Wiring is correct for the 255/1, but not for universal use.
make sure you have the M2.5 hole for screwing the transformer to the PCB in the middle.
personally I would connect it to ground or chassis too.

 

[Soeren_DK]

Universal print?

Cheers
Soren

 

[[silent:arts]]

reverse 1 to 8 and we should be there.
Haufe Data Sheets are like the ones from Lundahl,
pinout is solder side.

 

[Soeren_DK]

reverse 1 to 8 and we should be there.
Haufe Data Sheets are like the ones from Lundahl,
pinout is solder side.

I don't understand it. If I look from the bottom of the trafo it looks like this.

and the pinout from the datasheet say this.

The red dot is shown like its on the pin1 but in reallity its on pin8.. ??? ??? ???
Or is it because its mirrored.
Cheers
Soren

 

[Soeren_DK]

?

 

[[silent:arts]]

easiest way to find out: just measure it

 

[Silvas]

Hello

I've been enjoying my DAOC for a few months and it is a superb compressor on almost everything i throw on it. I still have a question regarding the stereo link...Is there some way to adjust the stereo match as in the D-LA2A ? I'm using the DAOC all the time in dual mono (on stereo material) without any troubles and the matching and metering is great, but as soon as i link the channels, there's a mismatch of a few dB's (GR tracking remains accurate, tho).

Any ideas of where i can start looking ?

Also, i have a very very small difference between channels (0,6dB) without any compression, and i'm using rotary switches...which will be a good point to fine tweak the gain a bit to compensate ? (just for peace of mind)

I was looking at the schemo, and i was thinking, maybe i can tweak the 470k feedback resistors in the output (or input) stage to fine tune the gain ? or there's a better way? (the 49,9k grid resistors?)

Thanks so much !

 

[Soeren_DK]

easiest way to find out: just measure it

Of course.
I think this is the way..

Cheers
Soren

 

[labak]

Hi everybody!

Strange things happen to me on this project.

With no tube I have the Heater sets up at 6.3V => ok.

I put a tube, ECC81 or 82, to every sockets I've got 2,2V and it's the max I can have with the trimmer at max.

I put 2 tubes, I've got 0,4V and same as before.

I've put a TO3 Lm 338K but I rode in this thread that on Silva one it's OK.

Components value are ok.

So do you think if I rebuild the Heater PSU every things could change.

I've already redone my solder plug on all the tube's sockets.

So a bit of help is welcome.

Regards.

 

[bernbrue]

Hi,
possible reasons: bad tubes, check the tube sockets from component side for solder blubs, check D13&14 for correct orientation, do the same for D 9-12 and also for C5,6,7,8, check the value of R5. Which power transformer do you use? It should deliver at least 9V 2,5A.
regards
Bernd 

 

[labak]

Ok I will Check.

The power transformer is the musikding's one.

Thanks Bernbrue.

Regards

 

[ilfungo]

sorry for a stupid question...
how can I  switch from GR to Vu?
thanks....

 

[Kingston]

reverse 1 to 8 and we should be there.
Haufe Data Sheets are like the ones from Lundahl,
pinout is solder side.

whoopsidaisies there!  

Lundahl datasheet pinouts are always top view, viewed from component side.

 

[[silent:arts]]

Lundahl datasheet pinouts are always top view, viewed from component side.

you are right ;D

 

[audiophreak]

.. not all of them...

http://www.lundahl.se/pdfs/datash/7903.pdf

  I got caught with this one  ;D

 

[[silent:arts]]

.. not all of them...

http://www.lundahl.se/pdfs/datash/7903.pdf

  I got caught with this one   ;D

;D ;D ;D
but at least Lars writes to the datasheet which side is shown.
there are other manufactures who don't :

 

[ilfungo]

hello
I just finished my D-AOC
I send photos as soon as possible ...
only problem
I had to remove the Bypass PCB
when connected to something strange happened to me

sound like an HP filter
ideas?