XG50 power on aging cycle

[Mike Parkes]

Hello Elecraft !
I want to run the KX3 Extended VFO Temperature Compensation procedure again
as I still get +/- 1 drift on 40 meters wspr. The instructions say: "If
using the Elecraft XG50 *for the first time*, an 8 hour power-on aging
cycle is recommended but not required." I did this the first time I ran the
procedure.

Q: Is the 8 hr warm up recommended *every* time you run the procedure? Or
was that just once, for the new XG50?

Thanks,
Mike AB7RU
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[Don Wilhelm]

Mike,

As the instructions indicate, you only have to do it once.
That is for initial aging of the crystal.

If you are getting only 1 Hz drift on 40 meters, note that the frequency
stability spec for the KX3 is +/- 1 ppm for a temperature range of 0 to
50 degC.  So you may not be able to do a lot better, much depends on the
temperature range inside the enclosure.
If you are running it at more than 5 watts, you might do well to invest
in an aftermarket heatsink.

73,
Don W3FPR

On 10/12/2019 3:52 PM, Mike Parkes wrote:

> Hello Elecraft !
> I want to run the KX3 Extended VFO Temperature Compensation procedure again
> as I still get +/- 1 drift on 40 meters wspr. The instructions say: "If
> using the Elecraft XG50 *for the first time*, an 8 hour power-on aging
> cycle is recommended but not required." I did this the first time I ran the
> procedure.
>
> Q: Is the 8 hr warm up recommended *every* time you run the procedure? Or
> was that just once, for the new XG50?
>

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[Mike Parkes]

Thanks Don, in that case I may just leave it as is!
73, Mike AB7RU

On Sat, Oct 12, 2019, 1:42 PM Don Wilhelm <[hidden email]> wrote:

> Mike,
>
> As the instructions indicate, you only have to do it once.
> That is for initial aging of the crystal.
>
> If you are getting only 1 Hz drift on 40 meters, note that the frequency
> stability spec for the KX3 is +/- 1 ppm for a temperature range of 0 to
> 50 degC.  So you may not be able to do a lot better, much depends on the
> temperature range inside the enclosure.
> If you are running it at more than 5 watts, you might do well to invest
> in an aftermarket heatsink.
>
> 73,
> Don W3FPR
>
> On 10/12/2019 3:52 PM, Mike Parkes wrote:
> > Hello Elecraft !
> > I want to run the KX3 Extended VFO Temperature Compensation procedure
> again
> > as I still get +/- 1 drift on 40 meters wspr. The instructions say: "If
> > using the Elecraft XG50 *for the first time*, an 8 hour power-on aging
> > cycle is recommended but not required." I did this the first time I ran
> the
> > procedure.
> >
> > Q: Is the 8 hr warm up recommended *every* time you run the procedure? Or
> > was that just once, for the new XG50?
> >
>

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