[Elecraft] KX3-2M module?

[Wayne Burdick]

Actually, with extended temp compensation applied, the KX3-2M module's long-term frequency stability is typically better than +/- 0.1 ppm (+/- 10 Hz). But it's the short-term excursions within this range that would probably not work with JT65. Again, I haven't tried it. These excursions are due to the FLL (frequency-locked-loop) algorithm, which obtains data from an EEPROM table having increments of about 0.1 degree C (after calibration is complete).

73,
Wayne
N6KR


On Apr 8, 2014, at 5:02 PM, Walter Underwood <wunder at wunderwood.org> wrote:

> The specs for frequency stability are not good enough for the JT65 modes (+/- 1 ppm typical over 0-50 C). On 2m, that would be +/- 144Hz. The extended temperature compensation improves that, but it will never be as stable as a K3 with an external reference.
> 
> Did you expect it to perform much, much better than the specs?
> 
> The FT-817 specs are: ± 4 ppm from 1 min. to 60 min. after power on. 25° C: 1 ppm/hour
> 
> wunder
> K6WRU