On Tue, 2006-12-19 at 20:25 +0200, Geoffrey S. Mendelson wrote:
> On Tue, Dec 19, 2006 at 11:30:57AM -0600, Dr. Gerald N. Johnson wrote:
>
> > All modern receivers have a couple failings. They hear nothing when
> > turned off. And they don't radiate so others can't tell they are on and
> > receiving without somebody calling CQ.
>
> Worse than that, they don't receive when the people you are trying to
> call are asleep, at work, not listening because your phone band is
> in the middle of their digital band, or you miss the few minutes a
> day the band is open for the next five years or so.
>
> This even seems to apply to all of my old rigs too. :-)
>
> Geoff.
I was thinking of the old regen or super regen sans RF stage that
radiated about as well as it heard, but others nearby could tell by the
radiated signal that it was on and where it was tuned. So the only way
to let the world know we are listening is to transmit CQ or something.
It may come to pass on the microwave bands that we will have to beacon
to cause the adaptive spread spectrum links to move away from where we
want to receive our signals.
73, Jerry, K0CQ
>
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|