Dear sir,

As I understood that a regenerative radio has a feed-back loop at the
detector stage, while Q-multiplier has it at IF strip. Has any body
tried the feed-back loop at RF stage itself.

I'm thinking of homebrewing a "tunable preselector" with a very narrow
bandwidth. If we can implant the Q-multiplier concept into the tunable
preselector, it should be very much cheaper than building one from a
combination of coroidal cores to get the best Q factor.

Best regards,
Amin