[Elecraft] KX3 Extended VFO temperature compensation procedure

[Phil Wheeler]

Mine didn't do anything so "wavering" as yours and 
it changed at a higher temp. So I wouldn't expect 
to see much effect while operating, since it was 
at high temps, above 42C.

My concern is if the calibration is off. If it was 
a simple linear fit then it could be. If a table 
look up or more complex fit then it should still 
be good at a normal operating temp range.

73, Phil

On 3/18/14, 8:18 AM, Bob wrote:
> Glad to know I wasn't the only one.  In my case 
> the issue around 38 to 42C is a big deal because 
> that is where the PA sits when running JT65.  So 
> it makes that mode unusable.  If the odd break 
> didn't happen until 52C I'd be all set.  And it 
> was definitely hopping all over the place 
> (sometimes rising, other times lowering, and in 
> larger step changes than I was seeing before).
>
> I'm not so sure this isn't a problem with the 
> radio locking onto a harmonic of the tone as it 
> shifts lower and lower in pitch.  I need to run 
> the test sometime with a scope on the output to 
> see what the signal looks like as gets very low 
> in pitch.
>
> Please let us know how it works out when you try 
> it on air.
>
> 73, Bob, WB4SON
>