On 11/14/2020 8:37 AM, Kenneth Wolff wrote:
I'm sure you are aware that the click sideband width is proportional to
the keying speed.
This is a serious mis-conception -- keying speed is quite secondary to
the rise/fall waveshape.
Given the same CW rise and fall times, a 40 wpm signal
is twice as wide as a 20 wpm signal. Not everyone knows this,
Right -- because it's only true with a clean signal!
but it's
easy to test using a second receiver, spectrum analyzer or P3.
Loud, fast stations are much more likely to get key click complaints.
Loud, yes. Fast not so much.
That said, JA radios are consistently too wide.
This is certainly true of Yaesu and ICOM; Kenwood less so. See
http://k9yc.com/TXNoise.pdf
73, Jim K9YC
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