On Tue, 2006-08-08 at 13:02 -0700, Grant Youngman wrote:
> > If we want real frequency stability, here is what is needed:
> >
> > http://www.bliley.com/n47x___nv47x___co_08.pdf
>
>
> After fretting over a few Hz for a while, I'm beginning to wonder why it
> matters so much, other than being able to measure it in so many parts ber
> gezillion and be able to just dial in the result for an FMT entry?
I did 1 part per million once with a 75S-3B on 40 meters in an FMT. That
was with 1 KHz dial divisions.
>
> How did ham radio ever survive having only 5 KHz dial markings on the radios
> (if you were lucky), and even if you could afford the really good stuff
> might be within a KHz or so? :-)
>
> Grant/NQ5T
>
Now at VHF and microwave I find most rigs are precisely inaccurate and
so don't run a 50 Hz filter to find someone, as they aren't where they
or I think they should be. Then you get a bit of Doppler shift from an
aircraft reflection or a train reflection and what's received wasn't
what was transmitted (to say nothing of the Doppler shift through
satellites)
--
73, Jerry, K0CQ,
All content copyright Dr. Gerald N. Johnson, electrical engineer
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