Problems with paia VCA

[James Damewood]

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.


Jimbob


>     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? nao 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.
>
>     Thanks for any light you might be able to shed on these problems.
>
> --M
>
>
>