On Fri, Aug 13, 2021 at 04:46 PM, Ashhar Farhan wrote:
The polyvaricon have horrible Q. The glass epoxy copper clads used as capacitors too have shown bad Q.
Would DIY polyvaricon or glass epoxy PC board variable capacitors work well for PI or L type antenna tuners? Is the Q requirement less critical there?
Whereas resonate RF tank circuits (if they are to work well for harmonic suppression) need high Q designs. Loop Antenna tuning needs to be high Q to be efficient. For low pass filters, is high Q critical or do you just make up for it with more poles?
Tom, wb6b
