[TenTec] Orion II - Tech Topics

[Dr. Gerald N. Johnson]

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