I could also do the same thing with a pair of pots. The advantage of the
dual caps from a factory-built oscillator is that the hard mechanical work
is all done -- and they're presumably matched well enough. It's simply
less
work. BTW, it's a lot easier to get 10-turn pots than even one-turn
capacitors these days..

Norm



Yeah, just thought there might be some particular reason you needed variable
caps.