[CQ-Contest] Key Clicks.... Continuing Problem

Jim Brown k9yc at audiosystemsgroup.com
Sat Nov 14 13:55:01 EST 2020

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

73, Jim K9YC

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