[sdiy] Expo-Con

[Busby Bergson]

Hi There -
I'm a new user to the group and a new(ish) builder of synthesizers.
I've been trying to understand exponential conversion.

I looked at Rene Schmitz's explanation at:
http://schmitzbits.de/expo_tutorial/index.html

>From that, I know that I'm not necessarily interested in heat
compensation or accurate tracking. So the double-transistor on Ian
Fritz's site makes the most sense to use:
http://home.comcast.net/~ijfritz/trans1.gif

But I'm not sure how to use it. There are three unspecified
connections here. I'm a little confused about what goes where.

Can anyone help?

Thanks,
BB