[Elecraft] K2 - 20M dead

[Don Wilhelm]

Mike,

It is highly unusual to have a transmit problem on 20 and still have 
transmit on 30 meters - those two bands share both the bandpass filter 
and the low pass filter.

The fact that you have HiCur messages should point the finger at the Low 
Pass Filter.

Are you certain it is receiving signals that are really on 20 meters?  
You might want to check the VFO frequency first - it should be 4913 kHz 
higher than the frequency shown on the K2 dial.  You can use the 
internal counter probe in TP1 and CAL FCTR.

If this is a K2/100, remove the KPA100 and test the base K2 working into 
a dummy load.

You may have to do Transmit Signal Tracing as indicated in Appendix A of 
the K2 manual to find where the failure point really is.

73,
Don W3FPR

On 9/29/2013 9:46 PM, Mike Murray wrote:
> I thought I'd give a RTTY contest a try this weekend so I dove in.  Found
> out after switching to 15M that I had my filters wrong so had to stop, open
> up the rig and reset.  Everything seemed to be OK after that until I tried
> transmitting on 20M - dead as a doornail!  Receives on 20 just fine,
> transmits OK on all other bands, but nothing on 20 in any mode.  Even
> occasionally shows hi current on 20 with no actual RF output.
>
> Anyone have any idea on where I should start troubleshooting?
>
>