[Elecraft] [K3] VFO tuning noise reduction mod results?

[James Sarte]

Hi Joe,

The mod in my case removed an S2-S3 tuning hash from 60m completely.  I
can't hear anything while spinning the VFO now, even with no antenna
connected.

73 de James K2QI

On Wed, Aug 26, 2009 at 12:57 PM, Joe Planisky <jplan at jeffnet.org> wrote:

> I have the VFO encoder noise on the low end of 10M.  Yesterday, I
> applied the VFO tuning noise reduction mod and switched to SPI 2 in
> CONFIG:VCO MD.  That seems to have reduced the tuning noise a little,
> but not as much as I'd expected (or hoped).  The noise was a solid S3
> before the mod, but now shows up as bobbling between S2 and S3, so
> call it a 1/2 S-unit improvement.
>
> I've triple checked the component locations and they're definitely
> soldered to the correct vias as shown in the instructions (Rev C).
> The diodes are oriented in the proper direction as shown.  I've
> checked the values of the resistors and forward/reverse direction on
> the diodes and all is as it should be.
>
> To others that have the noise and have applied the mod, is this in
> line with your results?
>
> 73
> --
> Joe KB8AP
>
>
>
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-- 
73 de James K2QI