Dave, N7AIG,
Please define "stochastic resonance", a new term for me, which may
apparently aid in weak signal detection.
When I was very active on 2M CW EME, in order to better detect very
weak signals below the noise, I played all kinds of adjustment games
with the CW BW, tone and IF shaping of my TS-930S. For my needs
(type of noise) it had by far the best NB that I've ever used. In
addition, I also used an Autek QF-1 external audio filtering system,
centered at about 400 Hz and an estimated 25 Hz audio BW. It did not
ring when adjusted properly. By dumb luck and extensive
experimenting, I discovered that the least expensive (cheapest)
headphones that Radio Shack sold, had a strong mechanical (audio
peak ?) resonance, also at 400 Hz.
My hearing (unadmitted at the time) had also like Fred's, had been
exposed to many, many very, very loud noises, during one of my
careers, and suffered greatly from Tinitus and overall hearing
impairment. It happened that my preferred or best CW weak signal
copying frequency, was 400 Hz.
Anyway when the searched for very weak signal ( sometimes > -10 dB
below the noise) lined up with all the adjusted BWs, it just seemed
to "pop" out of noise and become detectable.
So Dave, is this at all related to, or similar to " stochastic resonance" ?
Chuck, W7CS
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