I bought the referenced mixer kit on eBay. The vendor knows nothing technical and has not been helpful in communicating with the kitter, which I suspect is in eastern Europe. The instructions are not quite up to USA kit standards.
In particular, I have been unable to learn what pots P!-P3 and P1'-P3' are supposed to do.
Can someone please take a look at the schematic and give me an opinion? See:
Ken C
I think P1 and P2 are bass and treble controls, and P3 is a balance or wet/dry control.
As for the P1', all I see there is a connection for it on the board layout - it doesnt appear in the schem does it?
P3 is volume. The 'prime' version of the P1 to P3 pots are the other channel (right?). Only one channel shown.
The other P pots appear to be for the mixer function, 2 lefts and 2 rights.
FWIW, this is the eBay page:
Maybe P1-P3 and P1'-P3' are for the "sound regulator for low and high audio frequencies and a preamplifier,"
or maybe have to do with
"Supply voltage is bipolar and can be adjusted in the range of ±9 V to ±18 V."
What is life without some mystery?
If only I could be sure I wouldn't lose the magic smoke, I would just twiddle and see what happens.
Ken C
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