Chris Trask wrote:
I learned by way of Google that there was a thread on
this newsgroup last Summer regarding reciprocal
detectors. I'm interested in learning what sort of
success any of have you have had with regard to noise
immunity and adjacent signal suppression.

This was probably the discussion I triggered on the Reciprocating Detector.
I had intended to migrate my proto-board version to a more rf friendly board
this Winter but still have not done so. I have done little home brewing and
even less experimentation with detectors so can't really provide much
perspective. I thought it worked well on SSB with carrier, such as CHU, but
it
seemed to null the audio at centre lock on DSB signals - as though the
sidebands were demodulated with opposite phase. Thought it might have been a
consequence of the strays on the proto-board because I am the only one to
have observed this phenomenon with the RD, ttbomk.

Additionally its self-oscillation frequency pulled on strong bass modulation
towards the sideband of SSB suppressed carrier - a kind of FM distortion. It
likewise was pulled by strong ICW signals.

Tom