MOTM

>... and lately I started to use the BA6110 which apparently combines
the benefits of the 3280
(real current sources and low noise) with the buffer of the 13700.

This is a superb OTA, but as with all good parts R-Ohm have now
discontinued it. Although stocks do remain moderately high right now.

3280s are available in the UK from Viewcom in Ilford, but are as Juergen
says, very pricey.

I would be interested to see what happens to a sinewave through that
Serge VCA at 1KHz and 10KHz. Its very odd that one sees so much ringing
with a square wave even with unterminated banana leads. In fact, it
would be hard to do that deliberately by bad layout alone. Perhaps it is
a deliberate design characteristic to create an 'exciting sound'. What's
the output do with no CV input I wonder, and does the overshoot get
worse with greater CV?

But I have just built a clone of the second stage of his Wave multiplier
(VCM) and that is very nice.

Regards,

Tony Allgood  Penrith, Cumbria, England

Oakley Modular Synth and TB3030:
www.techrepairs.freeserve.co.uk/projects.htm
My music: www.mp3.com/taklamakan