I still think Drake 4-line had the best-sounding CW note. Has anyone
measured it?
-de John NI0K
Jim Brown wrote on 4/12/2021 1:47 PM:
On 4/12/2021 11:34 AM, Tony - KM0O wrote:
I read somewhere that the rise time was decreased in a previous firmware
issue, but I don't know if that's true.
Beginning with the earliest K3s, all Elecraft rigs use carefully
shaped keying to minimize clicks while maximizing readability. Wayne
describes it as a "sigmoidal" shape, describing the math function he
used. It's keying bandwidth as compared to other rigs can been seen here.
http://k9yc.com/TXNoise.pdf (ARRL Lab data)
and here
http://k9yc.com/P3_Spectrum_Measurements.pdf (My data)
73, Jim K9YC
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