Yes and when running PSK-31 if you don't get IMD reports of between -21dB
and/or more like -29dB then most likely something at your station needs
improvement. Usually overdrive either in the audio system or RF path is a
contributing factor. ALC action is often one culprit. Some radios leave
Specifically about PSK31, that encoding needs a very linear transmit system.
The 25 W recommendation keeps the signal and the peaks in the linear region of
most 100 W amps. Modes that do not use phase shift keying on a single carrier
might not have the same linearity requirements.
A clean 25 W
On 10/17/2018 6:36 PM, Bob McGraw K4TAX wrote:
At the same time, many of my contacts are made with 50 watts or less.
Yup. I mostly use FT8, JT65, and MSK144 on 6M and 160M. I generally run
as much power as I can on 6M, and on 160M to work EU or AF. OTOH, I'm
still trying to finish 160M WAS
Wes, Ed, et al;
In my past, having worked EME on 2M, 70cm, and 23cm, I understand path
loss, antenna gain, feed line loss, NF on the mast mounted preamps, amp
power to legal limit, weak signals, and etc. Now with that said, I'm
no different than anyone trying to work a new one for their
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