[Elecraft] Choice of signal source for KX3 extended temperature calibration?

[Bob McGraw K4TAX]

I'd hang a 1N914 diode across the output of the Siglent generator and 
tune it to 25 MHz.  The 2nd harmonic should be strong enough.

73

Bob, K4TAX


On 5/2/2019 5:26 PM, Frank O'Donnell wrote:
> Which of the following two signal sources would enable the best 
> results from the KX3's extended temperature calibration?
>
> --Elecraft's XG50 board, which puts out 49.380 MHz ± 5 ppm.
>
> -- Siglent SDG 2042X waveform generator, with input from a Trimble 
> Thunderbolt GPSDO. Maximum frequency on the Siglent is 40 MHz.
>
> The calibration instructions call for using a signal source close to 
> 50 MHz. Is 40 MHz close enough? The XG50 is much closer to 50 MHz, 
> whereas the Siglent/Trimble potentially has the capability of being 
> considerably more accurate. I'm interested in squeezing as much 
> frequency stability out of the KX3 as possible.
>
> Thanks and 73,
>
> Frank O'Donnell K6FOD
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html