MOTM

An excerpt from synth-diy, for those of you that do not describe.  In the
world of kits, you have MOTM and then the other guys....  the names have
been removed to protect the innocent.

-------------------------------------
I just assembled the PAIA VCA and have been experiencing
a couple of problems. Have any of you built this yet? I have
been having the following problems if anyone has any
suggestions feel free to let me know.

1) The noise (L out) seems to only give me a deep hum?
     Does not sound like white noise.
2) Seems the R vca channel is much louder than the L 
    channel. Even with pan turned all the way to the left
    I can still here the R channel. The left channel seems
    to work normally.
3) The A channel does not seems to work at All? no matter
    what I do I get nothing from A out?
4) I have the midi2CV and the VCF kit also it seems the
    vca picks up the modulation of the vcf ? I hear the noise
    from the L channel modulate in sync with VCF modulation.
    This stops if I switch the modulator off on the VCF.
-----------------------------------------

Also I am working on the PAIA VCA too.  The hum you hear on
the L channel is from the Midi2CV8 power's supply from the
positive rail.  It is delivering about 12.04 VDC and 1.4 vac rms.
I believe the power supply should have been a fullwave rectifier
instead of half-wave.  Also the noise generator products too low
of signal source to be effective.
-------------------------------------------------
 
interesting: I'm also working on the 9710, but the kit was
missing several resistors, *both* pcb mounted trim pots, one of
the matched trannies was broken/unusable, etc....it would 
otherwise be finished right now (i didn't have the missing parts
on my bench, and i refused to go out and buy them for
basic headstrong reasons.....)

i will be using blacets 15V ps; i hope i wont get the problems
stated here.  i've been using it with the m2cv8 and several
homemade modules with no problems.




----------
> From: Nathan Hunsicker <nate@...>
> To: motm@onelist.com
> Subject: [motm] Nevermind this message
> Date: Tuesday, March 14, 2000 1:01 PM
> 
> From: Nathan Hunsicker <nate@...>
> 
> Hi everyone, my email has been down for about a week, I just wanted to
make
> sure I am still a member of this group. -Nate
> 
> 
> 
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