[Elecraft] K3 Hissy and Noisy Audio

[Paul Christensen]

> You are right Jay. Bands 1 and 2 do nothing. There's nothing to reduce!

On my modified K3, adjusting band 2 (100Hz) will produce bone-jarring bass 
when boosted above +5 dB.

However, even though my moded K3 easily produces audible beats down to 30 
Hz, adjusting Rx EQ band 1 (50 Hz) has no effect whatsoever.   I just tired 
this by approaching zero-beat on a CW carrier, then backing off the display 
frequency in 50 Hz and 100 Hz increments.  Band 2 works quite well while 
band 1 seems to produce no change in Rx EQ.

Lyle/Wayne, can you confirm that band 1 is actually engaged in the firmware? 
If it is, then there's some other causation pre-AF amp.

Paul, W9AC