The world's most accurate clock

[Rob Seastrom]

That's a synchronization problem and I get that completely.  Great use
case.  I think it's a little difficult for an LO...  or am I off in
the weeds here?

-r

Nan and Sandy Sanders <radiodog77 at pobox.com> writes:

> 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
>>
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