[Elecraft] Transmit when switching from DATA to AM mode?

[Joe Planisky]

Hi all,

I've just discovered something odd with my K3 (#1772).  When I switch  
mode from DATA to AM via the front panel Mode button, the rig tries to  
transmit.  The red TX light comes on momentarily and I get a ERR TXF  
message (if in band) or an END message (if out of band) in the VFO B  
area.  I don't have the AM filter installed, so I don't think anything  
is actually going out over the air, but it doesn't seem like the rig  
should ever go into transmit on a mere mode change.

It ONLY happens when going from DATA to AM, not when going from FM to  
AM or between any other modes in either direction.  There is no mic  
connected to the rig, nor anything connected to the rear panel mic or  
line inputs.  The only things connected to the rig are a paddle, an  
external speaker, and the antenna.   It happens whether in VOX or PTT  
mode.

I first noticed it with MCU 2.67 (although I can't say if it happened  
with earlier versions.)  I've updated to the 2.76 beta release and it  
still happens.

Anyone else see this?

73
--
Joe KB8AP