Joe VE1BWV provides another audio pop mod:
You probably will want to install a pop click fix to eliminate a loud pop whenever TX is turned on and off. This circuit uses a 1N4148 diode, a 470k or 300k resistor, a .22 or .44uF cap and a 2n7000 MOSFET. Joe says this works amazingly well and mounts on the rear of the volume pot as indicated below (ignore the 0.1 uF capacitor).
Τhis works very well for me, but on CW TX the sound is very low and it’s hard to hear what I’m sending.