On Wed, 16 Nov 2005 17:00:57 GMT, Bob wrote:

As someone suggested, a differential arrangement will work but it's a
bit tricky. I'd prefer to substitute various values until I hit one
that is close enough.

It can be hard to get a differential capacitor these days.

One alternative could be to add a varactor (and a series capacitor)
into the resonant circuit and vary the varactor control voltage
according to the temperature. A suitable NTC or PTC in the voltage
divider feeding the varactor could be used.

Paul OH3LWR