[sdiy] Paia hex vca/mixer

[pfperry at melbpc.org.au]

Alabasta Noggin <alabastanoggin at lycos.co.uk> wrote:
> http://www.asahi-net.or.jp/~WZ4K-TNK/syoyuu/hexvca.html
> It doesn't have any of the resistor values on it though )o:

looking at the resistors in the color pic,

control in goes to 4k7, then a 100k to earth and a 100K which goes to another
100K to a pot wiper, and also to a 4M7 to the inverter input.
And there is a 4M7 across the inverter.
And the inverter out has a 270 ohm to ground, and a 22K audio input resistor to the inverter output.
The pot is a 50K, giving the control voltage offet.

(Actually, I looked at the ckt in Polyphony, july/aug 1979)

paul perry melbourne australia
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