I keep seeing references to Icom and key clicks. I use the 7610 and have never
received a report of a key click problem. Also, I typically use 1000 watts.
My amps are all Alpha 87A's.
I use a Kenwood TS-480HX in the truck, typically at full power (200 watts).
Last year I had reports of key clicks. That was discovered to be caused by low
voltage from a poor battery connection. Once that was fixed, I received good,
clean reports.
73, Keith NM5G
-----Original Message-----
From: CQ-Contest <cq-contest-bounces+kdutson=sbcglobal.net@contesting.com> On
Behalf Of Jim Brown
Sent: Saturday, November 14, 2020 12:55 PM
To: cq-contest <cq-contest@contesting.com>
Subject: Re: [CQ-Contest] Key Clicks.... Continuing Problem
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
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
|