[Elecraft] KX2 on JT65 & JT9 ??

[Dan - VA3MA]

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 <kl7uw at acsalaska.net> 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:
>    dubususa at gmail.com
> ______________________________________________________________
> 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
> Message delivered to va3ma at me.com