Re: KX2 in FT8 mode - heat? (Barry N1EU

[Edward R Cole]

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:
   [hidden email]

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[wayne burdick]

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

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