[sdiy] VCO vote?

[metasonix]

>the 'weirdest' one would be eric's metasonix tm-3. but boy,what a sound.. i
>love the way you can make the oscillators beat together.

yeah baby!

>but building tube vco's is not for the fainthearted..;-)

Not at all....
the basic circuit is right here.
http://www.blaze.net.au/~sasami/synth/tube/vco.html

Plate voltage is 105v, won't kill you. Just don't
expect more than about 2 1/2 octave range.
You also get better linearity if you get rid of the
cathode follower CV driver and replace it with an
opamp. It has to drive the thyratron grid thru
a 10k resistor, and it needs adjustable voltage gain to
compensate for the variation in thyratrons.

If Mike (or someone else) builds one, 
I can help with adjustments.


uncle eric
metasonix.com