[Elecraft] K3: Loud audio POPS

[Ken K3IU]

G'morning all:

I know that this loud audio pop issue was fixed with a 
firmware release (maybe 3.5x) in the past. However, during 
the ARRL DX CW contest while using a borrowed K3 (s/n 6425) 
while mine was on the west coast for repair, 3 or 4 times 
during the contest I experienced a loud, very short, audio 
pop in the earphones. I had updated the firmware on 6425 
from 4.67 to 4.83 prior to the contest so it would play 
nicely with the KAT500 and KPA500, so I am pretty sure 
firmware was not the issue. I do not specifically recall any 
particular thing that I was doing that might make the pops 
happen, other than I think they happened when I was QSYing 
or changing freq by clicking on a spot on the logger band 
map. So far as I know all the AGC CONFIG settings in  this 
K3 were defaults. The narrow crystal filter was 500 Hz. I do 
not recall these pops ever occurring in my K3 (s/n 202). In 
all other respects, the 6425 performed just as I had 
expected it would with no other issues.

Just wondering if anyone else has recently experienced this 
audio pop and if so what did you do about it???

Thanks...

73, Ken K3IU