[Elecraft] K2 doesn't work with mic connected

[Darrell Bellerive]

Gary,

Is the frozen state possibly the K2 in transmit?

A ground on the PTT line will put the K2 into transmit and lock the frequency 
display and disable most of the front panel controls with the exception of 
the power control.

I had the similar problem with a stray strand of wire in the mic connector. 
The problem appeared and disappeared with the movement of the mic cord at the 
connector.

As the PTT line and dot line are common, connect a dummy load, turn the power 
to minimum, remove the mic, set the mode to CW and then reconnect the mic. If 
you get a sidetone when the mic is reconnected you know where the problem is.

On SSB, the PTT switch in the mic may be opening the mic's audio path, so the 
rig will not have any power output. Checking on CW will isolate the problem.

Checking the mic connector with an ohmmeter might also find the PTT and Ground 
shorted, unless like my mic, the problem was intermittent and dependant on 
the position of the mic cord.

Darrell



On Friday 15 February 2008 20:00, Gary Krause wrote:
> I thought I had a problem with the control board originally.  When I
> turned on the K2 the "Elecraft" would come up and then go to the
> frequency.  However, everything was frozen.  Nothing worked and the
> frequency couldn't be changed.  I re-installed the control board, turned
> it on and everything worked fine until I plugged in the mic.  Then
> everything froze again.  Unplug the mic and everything comes back to
> life.   I checked the jumpers for my mic configuration and they are
> correct.  I'm using a Kenwood MC-60 mic with an internal preamp.
> However, I don't use the preamp but, I have the jumper installed for
> it.  Any ideas?
>
> Thanks,
> Gary, N7HTS
> _______________________________________________

-- 
Darrell Bellerive
Amateur Radio Stations VA7TO and VE7CLA
Grand Forks, British Columbia, Canada