[Elecraft] K-3 whine when audio gain at zero

[Bob McGraw - K4TAX]

Sounds as though digital noise is getting into the analog ground. Make 
sure all connections  between the radio and power supply are clean and 
tight.  Also, check the ground between the radio ground terminal and the 
power supply ground terminal.

Has anything been added to the station in terms of equipment?  Also make 
sure all PL-259 connectors are more than finger tight.  I use a pair of 
4" Channel Lock pliers to snug them when I add or remove something.

73
Bob, K4TAX

On 11/7/2015 11:18 AM, Art via Elecraft wrote:
> Recall reading about others with this problem, but cannot locate it using search on this thread. Any help with removing this aggravation would be appreciated.
>
>
> My issue is intermittent. Had it briefly before, but mysteriously disappeared. Now it's back.