[Lowfer] KFI Captures and stability of AM Stations

[Ed Phillips]

Joseph DiVerdi wrote:
> 
> At 1:25 PM -0400 8/13/2003, Jay Rusgrove wrote:
> >Les
> >
> >The receiver setup I'm using here has all the oscillators tied to GPS so there
> >is essentially no drift - maybe .02 Hz ... so the signals in the capture below
> >are exactly as they appear. I've monitored a number of am station carriers over
> >the last couple years and many are, indeed, all over the place. Guess that's the
> >beauty of an am detector!
> >
> >http://www.advancedreceiver.com/capture/KFI081003.jpg
> >
> >Jay Rusgrove, W1VD
> 
> Dear Jay,
> 
> Would you please give some indication on how you tie "... all the oscillators ..." to GPS. Thanks.
> 
> Best regards,

	Answer is that you spend money or spend a lot of time building
something.  There are commercial devices of all kinds which do this,
including plug-ins for PC's.  None are very cheap.  There's been at
least one QST article on the subject and perhaps more, and I'm sure you
could fine construction articles on the internet.  Precision possible is
of the order of one part in a billion.

Ed