Edward Your test results are much appreciated! Any very informative! Thank you kind sir Would be interesting to be able to compare a newer KX3 with rev E boards to your past test results 73 Dan
> On May 30, 2016, at 2:05 PM, Edward R Cole <[email protected]> wrote: > > I ran extensive frequency drift measurements on the KX3 in 2014, purchasing > an aftermarket heat sink for my KX3. After running the temperature > compensation procedure I reported: > > I re-ran the JT65 testing sequences to measure frequency drift after > temperature compensation was done. > Initial sequence shows the most drift with a peak +13 Hz upwards drift in > the first sequence. The remainder > Showed under 10-Hz with the delta trending to +5 Hz in later sequences. > > Testing was done on 50-MHz which would show the most drift; I did not check > for HF drift which one would expect to be proportionally less. > > http://www.kl7uw.com/KX3.htm > > Data is displayed on some charts accessible by link from main page. > > I also acquired the heat sink produced by Elecraft but have not tried it > considering the one I previously purchased has much more thermal mass. Drift > before adding heat sink and performing Temp comp. was 103-Hz accumulated over > 20-min test of running key-down in CW for 50-seconds followed by 70-seconds > in Rx, repeating ten times. > > I use a professional frequency counter usable to 26-GHz whose TCXO appears > stabile against a Rubidium reference. > > I have not run the KX3 on JT65 very much (a little on 6m a couple years ago); > haven't built IQ interface. I have a K3 with EXREF running 2m-eme and > 23cm-eme with transverters so the KX3 gets used for other kinds of use. I > have the 2M board installed. Haven't checked drift on 2m with it. > > Reading the mail to see what will be reported for the KX2. > > 73, Ed - KL7UW > http://www.kl7uw.com > "Kits made by KL7UW" > Dubus Mag business: > [email protected] > ______________________________________________________________ > 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] ______________________________________________________________ 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]
