"Jack Schmidling" wrote in message
...
I am in need of zero tc caps for my VFO project but can't seem to find any
info on them. Who makes them? What are they called?

Digikey has some with tc's of 200 ppm but that aint zero.

The also have some that are 0 +/- 500 ppm and that makes no sense.

I need two at 1000 pf.

Thanks,

js

Don't forget, a lot of the drift is caused by the inductor in the resonant
circuit, and it will have a positive coefficient. Most VFOs have some
compensation using a cap with a negative temp coefficient to compensate.

Pete