K2 PLL Ref. Oscillator Range Test Problem.

[Jimithy66]

I am building an older QRP K2 kit ser. # 2438 Ver. A in
the Alignment and test section Part 11.  pg. 57,  the
PLL Ref. Oscillator Range  Test is out of limits.

The Reference High and Low frequencies are OK with
 readings (12100.53 high and 12089.43 low) with  range
 limits of 11.5 - 25  KHz but it is low, 11.1 KHz.
Is this a problem ?

In the PLL  troubleshooting section all readings are OK
except the BFO buffer output (0.025 -  0.070 VRMS )
 is slightly high 0.076 VRMS. Is this a problem ?

And lastly,
How do I visit the archives on this list ?

Thank you,

Jim / W1FMR
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[Don Wilhelm]

Jim,

It is likely to work OK even with the reduced PLL range.
If you want to correct it and gain some temperature stability for your
K2 at the same time, add the BFO upgrade modification - get BFOMDKT from
Elecraft.

That kit contains a new PLL crystal as well as parts for the BFO.

You can see older posts at Nabble.

73,
Don W3FPR

On 5/22/2019 12:25 AM, Jimithy66 wrote:
> I am building an older QRP K2 kit ser. # 2438 Ver. A in
> the Alignment and test section Part 11.  pg. 57,  the
> PLL Ref. Oscillator Range  Test is out of limits.
>
> The Reference High and Low frequencies are OK with
>   readings (12100.53 high and 12089.43 low) with  range
>   limits of 11.5 - 25  KHz but it is low, 11.1 KHz.
> Is this a problem ?
>
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[Jimithy66]

Thanks for your help Don and your suggestion on the mods. I had made the
crystal and toroid mods but didn't think of the other components in the mod
kits.

Jim / W1FMR

On Wed, May 22, 2019, 8:47 AM Don Wilhelm <[hidden email]> wrote:

> Jim,
>
> It is likely to work OK even with the reduced PLL range.
> If you want to correct it and gain some temperature stability for your
> K2 at the same time, add the BFO upgrade modification - get BFOMDKT from
> Elecraft.
>
> That kit contains a new PLL crystal as well as parts for the BFO.
>
> You can see older posts at Nabble.
>
> 73,
> Don W3FPR
>
> On 5/22/2019 12:25 AM, Jimithy66 wrote:
> > I am building an older QRP K2 kit ser. # 2438 Ver. A in
> > the Alignment and test section Part 11.  pg. 57,  the
> > PLL Ref. Oscillator Range  Test is out of limits.
> >
> > The Reference High and Low frequencies are OK with
> >   readings (12100.53 high and 12089.43 low) with  range
> >   limits of 11.5 - 25  KHz but it is low, 11.1 KHz.
> > Is this a problem ?
> >
>

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