[Elecraft] RF gain sweet spot

[Guy Olinger K2AV]

It is possible that there is a problem in the RF gain pot.  It IS a
potentiometer.  It has a standard voltage across it, and the variable
voltage in the pot's "wipe" is sent to an analog to digital converter,
which converts the pot setting to "numerical advice" which can be more
easily sent to the CPU over one of the various digitally multiplexed
communication busses.

It could be a non-linearity in the potentiometer, where on a normal
K3, the "sweet" spot would be a point in the gain setting where the
absolute unchanging difference between signal and noise is interpreted
most favorably by the ear/brain which has its own way of hearing. That
trick has been around for a long time.

73, Guy.

On Fri, Jul 22, 2011 at 11:17 AM, K7WIA <emoss98133 at msn.com> wrote:
> Geoff...  my K3 only has the one filter in it at the present time, so I can't
> check that out for you.
>
> Ed  K7WIA
>
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