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Old 22nd Jul 2019, 9:19 am   #14
Bazz4CQJ
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Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 4,934
Default Re: Use of a Ceramic Resonator in a BFO

I wonder (suspect) if it is the case that the resonators have greater temperature sensitivity than a crystal, so the tempco of the capacitors in the circuit may need to reflect that? I must checkout which resonators I have in stock; I think I have about 4 different types, all bought some time ago for project which (as yet) never proceeded.

Additionally, I'm interested in making the BFO tune with a varicap diode.

B
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