[Elecraft] XG50 warmup after initial run

[Mooneer Salem]

Don,

Makes sense. I actually went ahead and did the temperature compensation
procedure tonight. I let the XG50 warm up while the KX3 was warming up (~30
minutes), then performed the procedure. Cooling down for a bit after, I
noticed that the tone now varies by +/- 3 Hz, much better than
pre-procedure. Pretty good for using a hotel mini-fridge that only cooled
the radio down to 19C. :) Thanks all for the advice.

73,

-Mooneer KG6AOV


On Fri, Feb 15, 2013 at 5:15 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:

> Mooneer,
>
> I would not go so far as to say that.  Any stable signal generator needs
> some warmup time.  For instance my HP8640B is very stable - but only after
> about a 2 hour warmup period.  Everything inside has to come up to
> operating temperature, and it drifts until that occurs.
> I would suggest at least a 15 minute warmup for the XG50, a half hour
> would be better.  At least I would be more comfortable with an assumption
> like that even if it is overkill.
>
> I believe the 8 hour 'burn in' is a time to allow the XG50 crystal some
> 'run time'.  New crystals will typically exhibit some initial change in
> frequency that does not re-occur - think of it similar to the 'break-in'
> period for a new engine - you don't have to repeat that every time you
> start the car, but you do have to let it warm up before it will deliver
> peak performance.
>
> 73,
> Don W3FPR
>
>
> On 2/15/2013 7:53 PM, Mooneer Salem wrote:
>
>> Assuming the 8 hour run has been done, it sounds like I can turn on the
>> XG50 right when I start the procedure. Thanks for the clarification. :)
>>
>>
>