[Elecraft] K3 Main RF Gain problem

[Jim Byers]

On 09-12-23 8:09 , Don Wilhelm wrote:
Don,

When the sub is using the main gain potentiometer I thought that the sub 
should  also be effected but it is not.

Jim


> Jim,
>
> The gain controls are potentiometers, not encoders, so yes, you could 
> have a bad spot on your RF Gain control such that the resistance has a 
> "bump" in it near the 9:30 position.
> Firmware efforts are not likely to fix it if the pot itself has a 
> resistance bump.
>
> 73,
> Don W3FPR
>
> Jim Byers wrote:
>>
>> The problem is with the main  RF gain. If I turn down the Main RF gain S
>> meter goes up as expected, the gain is  heard to decrease and seen to
>> decrease by Spectrogram. So far so good.
>>
>> When I keep turning the gain down the  S meter will increase to S 30 (Rf
>>  knob position 10 o'clock) When the knob position reaches 9:30 the S 
>> meter
>> drops to S6 and the gain comes back up both heard and seen by 
>> spectrogram.
>> Further movement will decrease the gain to zero as heard and seen but 
>> the S
>> meter stays at S6. Increasing the gain the reverse happens. This is 
>> true in
>> all modes.
>>
>> The sub acts normally as heard and seen by spectrogram and the 
>> S-meter acts
>> as it should.
>>
>