D-AOC PCBs - the building and help Thread

[Soeren_DK]

How should I connect the Haufe 255/1 trafo for the input?
http://audio.kubarth.com/rundfunk/index.cgi - Haufe RK255/1

Cheers
Soren

 

[Soeren_DK]

???

 

[Soeren_DK]

I think I figured it out with the input trafo.

Now I'm almost finished and I think I have some kind of problem inside.

If I'm feeding the two channels with the same signal and turn the pots the same I don't get the same reading at the meters inside the machine and in Logic. Even in stereo mode the pots is not showing the same thing to get the same signal out.

I have tried switching input trafo and tubes but without luck. Is it the VLT's there is the problem?

Cheers
Soren

 

[Soeren_DK]

I can see that many of you got the same problem.
Any drawings on how to trim the vactrols?

I don't have a to much input gain. I shall twist both Threshold og Input to max if I want to hear the really hard compression. I've used to Vactrols for both channels. When I do the same with the 1176 I can hear the hard compression in about half.

Any of you noticed that?

Cheers
Soren

 

[tomcat]

I remember i did read something in the last 46 pages about a trimmer on the vactrols and use of dual vactrols.

 

[Soeren_DK]

I remember i did read something in the last 46 pages about a trimmer on the vactrols and use of dual vactrols.

Hi tomcat.
I've looked around but I can't find some info that explain exactly what to do in this situation? Some people changes Vactrols and some one using trimmers on some legs of the Vactrols..  ??? ??? ???

Cheers
Soren

 

[tomcat]

Did you try the dual vactrol approach?

 

[Soeren_DK]

Did you try the dual vactrol approach?

Yes I did the Kubi mod. One facing up, One facing down.

Cheers
Soren

 

[ilfungo]

hello Soeren_DK
I solved using the trimmer 500R on the vactrol + ....
I have another problem ....
when I'm more than half of the input pot  hear saturation ...
can be a power problem?
thanks

 

[Soeren_DK]

hello Soeren_DK
I solved using the trimmer 500R on the vactrol + ....
I have another problem ....
when I'm more than half of the input pot   hear saturation ...
can be a power problem?
thanks

@ilfungo
Thanks
What leg is it? On all 4 vactrols?

Cheers
Soren

 

[ilfungo]

+ on led....

 

[ilfungo]

hello Soeren_DK
I solved using the trimmer 500R on the vactrol + ....
I have another problem ....
when I'm more than half of the input pot   hear saturation ...
can be a power problem?
thanks

??? ??? ???

 

[Soeren_DK]

hello Soeren_DK
I solved using the trimmer 500R on the vactrol + ....
I have another problem ....
when I'm more than half of the input pot   hear saturation ...
can be a power problem?
thanks

What about the mod with the trimmer? Could it cause this kind of problem?

Cheers
Soren

 

[ilfungo]

hello Soeren_DK and thanks for your reply
no, do not think so.
the problem is present even without compression .....
Just past the half with  input pot I have distorted sound ...

 

[Jonkan]

Hi, im trying to finish this build that i started a loooong time ago.

I have two edcor xs1100 transformers that i was gonna use for the inputs, but im not sure how to wire them exactly. the windings are 2+2:1+1 i think.

The data for the transformer is here. http://edcorusa.com/products/346-xs1100.aspx

Can somebody please take a gander at the specs and tell me what would the best way to use it? It would save me alot of headache since its been ages i had to hookup a transformer last.

Btw, is it possible to connect it in backwards somehow so that i get some stepup gain, so i dont have to send a superhot signal for the unit to compress? Or will that **** with the impedances?

Thanks for any help or guidance on where to read up on this.
Cheers,
Jonas

 

[Audioman]

Hi all
Anyone can tell me how to connect the primary of the trafo that i'm buy from dasmusikding for the D-AOC ??
i send the picture of the trafo
Please let me know
Thank you

 

[Audioman]

second picture

 

[Audioman]

problem solved !!
violet and yellow are the two 220v , white and orange must soldering together
now look forward for finally complete the unit !!
Bye Bye

 

[ilfungo]

I continued my experiments on the distortion ...
I am almost convinced that the problem is on input transformer (edcor 600:10 k) ...
If input arrival with a maximum of half the sound is clean and beautiful ...
I would like to use for DAOC mastering, but when I go in with an extremely high signal (Song Mix) I can not regain what compress ...
someone has a similar problem?
does anyone know the input liimit of these transformers?
is there an alternative?
Thanks

 

[syn]

4:1 step up is not needed. 1:1 (10k:10k or 15k:15k) is all is needed. Kubi mod is a must (IMHO).
With high levels you are killing the input tube.