Re: question for psk users
Posted by
ve3dvy on
May 02, 2012; 5:07pm
URL: http://elecraft.85.s1.nabble.com/Re-question-for-psk-users-tp7517322p7522935.html
You are assuming that everyone has the luxury of narrow roofing
filters and can filter out the week and reject unwanted strong
signals. most PSK stations are not blessed with a K3 and are not able
to suppress strong signals. before I had a K3 2.4 was the narrowes I
could do. most afordable rigs today still stop at 3khz (FT950) and
some even wider. You should use as little power as possible to
conduct your QSO. where I come from that is the law. using high
power to conduct a PSK31 qso is rarely necessary. most other PSK
users are running less than 30 W and if you can hear them you probably
don't need 100+ watts to talk back. I agree that it is needed in
some cases but one should only shout when you need to and talk normal
or even whisper if you can.
David Moes
VE3DVY
>
> The reason why a strong signal will "annihilate all the other PSK
> signals" is that most users are trying to receive an entire 2.5kHz
> bandwidth in one gulp. This means that even one strong signal within
> that bandwidth will activate the AGC and drive all the other signals
> down.
>
> Regrettably most PSK users don't understand what is happening, so they
> have to rationalize it into simpler terms like "It's a crime to be
> loud."
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