[sdiy] Varactor-based VCF

[Tim Stinchcombe]

> ballpark ratio for a varactor. I would suggest however 
> increasing those 1k resistors at least 10 fold: with such low 
> values you are needlessly running the risk of limiting the 
> range of the op amp output swing.

Aargh! Don't you hate it when *seconds* after you press 'send' you realise
you've said something really dumb! Ignore this comment - it is boll*cks! (at
least in this context - I was thinking of something recently where I *did*
have such a problem, but a different configuration...)

Tim