[Elecraft] CW Pitch Resolution

[Bill W4ZV]

Sverre Holm (LA3ZA) wrote
> To sum up the interesting studies from the early 90's on Morse code
> recognition and the effects of pitch frequency, signal to noise ratio and
> code speed I posted the abstracts of some of the Montnemery papers on my
> blog as well as some key illustrations. 
> 
> See
> http://la3za.blogspot.no/2013/10/studies-on-morse-code-recognition.html

Sverrre I posted the following on your website but am repeating it here in
the hopes Fabian DJ1YFK will see it and notify me when his SNR challenge is
available on LCWO.net:

Hi Fabian

Copying weak CW signals and psychoacoustics has been a passion of mine since
I was first licensed (1957). More recently it has taken the form of DXing on
the low bands (especially Topband) and SOTA operating (QRP from summits).
I've signed up on LCWO and hope you will implement your SNR challenge. BTW
here is a related website by AB7E about weak signals:

http://www.ab7e.com/weak_signal/mdd.html

Many years ago I discovered 270 Hz was my personal optimum pitch for copying
very weak signals on the low bands. This was using a TS-930S which had
continuously adjustable pitch. I even found 240 Hz was sometimes useful. I
was disappointed that the Elecraft K3's lowest pitch setting is 300 Hz but
have learned to "live with it".

73, Bill W4ZV



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