[Bazz4CQJ]

Originally Posted by vosperd

http://www.pan-tex.net/usr/r/receivers/sbfo.htm I recently built this two terminal resonator circuit on stripboard and it works fine. So far without adding the transformer.
Don m5aky

Thanks for that info; that's one of the circuits that I'd found in my search. Wonder what you are using it for? I want to improve my beloved Realistic DX-160 , kindly given to me by Hybrid Tellies some time ago. Curiously, I spend more time tinkering with that than I spend using my Icom 718!

If I do replace the existing BFO (with its LC circuit), I must check the level of drive the BFO feeds in to the product detector so that I can replicate that. The oldest BFO circuit using a ceramic resonator that I found was a 1988 circuit from Rad Com, again, using a FET.

B