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 <[email protected]> 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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
