The world's most accurate clock

[Nan and Sandy Sanders]

At lf and vlf there are some experiments going on with very long 
integration times with fft windows in the uHz range with transmitters 
and receivers locked to GPS or .MIL VLF transmitters. Not sure if 
anything at HF needs to be that tight.
      Sandy
     WB5MMB


At 04:35 PM 1/26/2014, Rob Seastrom wrote:

>Mike ODELL <mo at ccr.org> writes:
>
> > Alinco has a new(ish) "hybrid" HF+6 transciever (Classic analog superhet
> > with integrated what looks to be quality 24/192k quadrature ADCs
> > after the last mixer with USB connectivity) but the thing most interesting
> > is provision for input from a GPS to discipline the Master Oscillator.
> > dunno if it has a 10MHz output but that would be nice.
>
>Are you referring to the DX-SR9T/E ?  I couldn't find anything about
>GPS-in and its stability is listed as 1 ppm, which is nowhere near GPS
>land... http://www.alinco.com/Products/DX-SR9/
>
>Do we really care that much about long term stability for the
>frequency of our signals, so long as the effects of oscillator ageing
>don't put us outside of where we're supposed to be transmitting?  I
>mentioned at the technical meeting earlier this month that GPS is
>fairly lousy for short term stability...
>
>http://www.febo.com/pages/stability/
>
>Is GPS slaving on HF radios just the equivalent of a wing and a big
>loud muffler on your car?
>
>-r
>
>_______________________________________________
>Tacos mailing list
>Tacos at amrad.org
>https://amrad.org/mailman/listinfo/tacos