[Elecraft] KX3 Extended VFO temperature compensation procedure

[Phil Wheeler]

Also -- I haven't done any digital/data modes with 
my KX3 as yet, and may not (have a K2/100 and a 
K3/100 which may be more favorable for that than a 
barefoot KX3). However, I do have a SignaLink USB 
with cables for the KX3 so I may eventually use it 
that way portable if the opportunity arises.

I suspect the thermal conditions will stay pretty 
benign in CW and SSB modes.

73, Phil w7ox

On 3/18/14, 9:43 AM, Phil Wheeler wrote:
> 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
>>
>
>