[Elecraft] KX2 in FT8 mode - heat? (Barry N1EU

Wayne Burdick n6kr at elecraft.com
Sat Nov 25 02:20:56 EST 2017


FWIW, the drift is proportional to frequency, so you should be seeing < 3 Hz on 20 meters. 

It’s < 2 Hz on my lab test unit on 20.

Wayne
N6KR


----
http://www.elecraft.com

> On Nov 24, 2017, at 4:23 PM, Edward R Cole <kl7uw at acsalaska.net> wrote:
> 
> I ran intensive frequency stability tests on my KX3 in 2014 after getting it.  Adding a VE3FMN heat sink and running the temp-compensation procedure maximum drift running JT65 on 6m showed +13-Hz drift in the first minute; no more than 10-Hz afterward.  That is good enough for JT65 (but not sure what WSPR or FT8 require).  Before installing the heat sink drift was 54-Hz before temp comp.
> http://www.kl7uw.com/KX3.htm
> 
> 73, Ed - KL7UW
>  http://www.kl7uw.com
> Dubus-NA Business mail:
>  dubususa at gmail.com 
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