[Elecraft] K2 - noisy AF & RF Gain Controls

[Don Wilhelm]

Eric,

Yes, the most likely problem is a faulty pot on both the AF Gain and the 
RF Gain.
You are probably referring to mention of the Alternate AF Gain Wiring 
Mod.  If your K2 serial number is greater than 3000, it is already 
installed, but if your serial number is below that, you should change 
the wiring of the AF Gain control.

That wiring change reduces the DC current flowing through the pot - and 
that wiring change will *not* cure an already noisy pot, but it will 
keep a good pot in good condition longer.

73,
Don W3FPR

On 1/19/2012 10:04 AM, William Eric McFadden wrote:
> Good day.
>
> My Revision A K2 has noisy AF and RF gain pots. More precisely, turning
> the AF gain pot produces scratchy audio and the turning the RF gain pot
> causes the audio to drop out momentarily.
>
> I've heard that the sort of behavior I'm seeing/hearing with the AF gain
> pot isn't necessarily caused by a faulty pot; if this is the case, which
> mod should I install before I think about replacing the pot?
>