D-AOC PCBs - the building and help Thread

zayance said:

Where did you get the illuminated power switch!!!

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http://fr.farnell.com/marquardt/1555-3102/rocker-switch-red-dp-150/dp/1831119

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bobine said:

That looks like a better scale for a pot than a switch...with all the subdivisions. For a switch I think I'd want a 23-position numbered scale with no excess marks. Maybe odd numbers only?

The ticks are 15 degrees apart.

Here's a discussion: http://www.groupdiy.com/index.php?topic=28454.0

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jsefer said:

Finally got to really sit down and try and diagnose my issues. As it stands this is what my unit is doing

1. Acts as a limiter, sort of... at 0db compression there is a 1-2db gain reduction at full "input" and full "output"
2. At 0 compression, there is a permanent difference of about -.5 to -1db from the right channel to the left.
3. In link mode the channels are with in -1db matched, but in mono mode the difference is much larger, upto 6db in some settings.
4. The right channel starts to compress at about the 13 setting on the 23 position switch. The Left channel behaves normal with compression beginning at about the 9th position.

I checked all my voltages and they are correct, I checked the step switches and their values are with in 1% checked all my wiring. I also read all the 55 pages here and only a few times where my issues mentioned but never any solutions posted.

I was thinking to solve the issue of -1db while in 0 compression, to put a small trim pot on the output dial and trim off untill the channels are closely matched... any comments on this?



thanks In advanced for any suggestions...

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ilfungo said:

sorry
has anyone tried Perkin Elmer Vactrol to solve problems in stereo?
I read that have better features than the other .... vactrol
thanks

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ilfungo said:

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

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ilfungo said:

jsefer said:

Finally got to really sit down and try and diagnose my issues. As it stands this is what my unit is doing

1. Acts as a limiter, sort of... at 0db compression there is a 1-2db gain reduction at full "input" and full "output"
2. At 0 compression, there is a permanent difference of about -.5 to -1db from the right channel to the left.
3. In link mode the channels are with in -1db matched, but in mono mode the difference is much larger, upto 6db in some settings.
4. The right channel starts to compress at about the 13 setting on the 23 position switch. The Left channel behaves normal with compression beginning at about the 9th position.

I checked all my voltages and they are correct, I checked the step switches and their values are with in 1% checked all my wiring. I also read all the 55 pages here and only a few times where my issues mentioned but never any solutions posted.

I was thinking to solve the issue of -1db while in 0 compression, to put a small trim pot on the output dial and trim off untill the channels are closely matched... any comments on this?



thanks In advanced for any suggestions...

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jsefer!!
I am in the same situation
great sound, but;
without compression, the two channels are out of 0.2 db (I'm happy to analog)
in mono mode, up to 5 dB (compression) = 0.5 db out
in mono mode, up to 10 dB (compression) = 2 db out
in stereo mode, all off.
Vactrol, are always
off (From what I read ............)
HELP!

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