[Elecraft] K3 Popping noise in headphones??

[Jim Brown]

On Sat,10/17/2015 11:58 AM, jim wrote:
> I sent the rig in to Elecraft for upgrades AND to see if they could sort out
> the constant hiss (with the AF gain fully counter clockwise) that I heard in
> the Bose headphones with them set at "hi" sensitivity.

Putting on my audio engineer's hat, THAT'S the likely cause -- that is, 
the "gain staging" is all wrong. The K3 has reasonably high output from 
the headphone amp, and you should be setting the audio gain in the K3 in 
it's normal range. Turning down the K3 AF gain and setting the Bose 
phones for high is a RECIPE for hiss, and may be the cause of the clicks 
too.

73, Jim K9YC