Yes, it is a very good point !
This is why I qualified my post on this subject to say "and only on RTTY."
When running PSK I never go above maybe 25 watts or so.
But then...it is a highly efficient transmission mode with an inherently
high signal to noise ratio.
Gary
----- Original Message -----
From: "Dr. Gerald N. Johnson" <geraldj@weather.net>
To: <tentec@contesting.com>
Sent: Thursday, July 01, 2010 11:50 PM
Subject: Re: [TenTec] Omni V power limits
Very good point.
73, Jerry, K0CQ
On 7/1/2010 3:50 PM, CSM(r) Gary Huber wrote:
Even if you have a clean, low distortion signal, while using an
amplifier,
you need to keep the output to 50W or so to avoid causing AGC compression
in
the receivers of the other stations in the PSK-31 sub-band. Don't forget
that in PSK-31, many stations are simultaneously using a single 2500 Hz
SSB
bandwidth with a recommended output of 30W. When there are QRO signals
in
the waterfall, the receiver AGC typically causes the weaker signals to be
less likely to be decoded as their audio will be reduced..... its fairly
easy to figure out which signal in the waterfall is causing the other
signals to be compressed but its difficult to politely convey to the
perpetrator the damage being caused. Few DX-peditions want to offer
PSK-31
contacts for the very reason that many operators will not abide by the
self-imposed low power necessary to share a PSK-31 sub-band.
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