[Elecraft] K1 no sidetone

[Mike Morrow]

David wrote:

> ...still no sidetone or ability to change XFIL ! 

Does the LCD show FL1, FL2, FL3, FL1, etc. as you press and hold the
XFIL pushbutton (without any actual effect)?  (You may already have
supplied this info, but I didn't see it.)

If the LCD shows the expected FL1/2/3 change, do you see any DC voltage
change on the XFIL/TONE line while you select different filter bandwidths
in receive mode?

Did you look for a low DC resistance to ground on the XFIL/TONE PCB
trace from RF board P1 pin 5?  RF-P1 pin 5, after the front panel board
has been pulled away from the RF PCB, should show rather high resistance
to ground.  A low resistance path to ground could cause conditions similar
to what you report, without adversely affecting other functions.

Mike / KK5F