Gill,

May I suggest you open the top of the K3 and give each one of the TMP 
cables a slight turn in their sockets while applying a bit of pressure 
toward the socket.  Grasp the "ears" on the TMP connector, do not try to 
twist it holding only the cable.

Look in the assembly manual and make certain the TMP cables are 
positioned as shown in the photos.

No guarantee it will fix this spur, but it is a good starting point.

The Birdie Removal Tool can be used if that does not correct it for you.

73,
Don W3FPR

On 8/20/2011 1:06 PM, Gill W4RYW wrote:
> While looking for a source of some steady carrier interference on the 20M and
> 15M bands, I noticed that one of them at 21.017.9 Khz moved (on the P3
> screen) in proportion to the tuning of the K3. Obviously a birdie as I
> checked with no antenna. The birdie had side lobes - i.e. there were weak
> carriers either side at 12Khz offsets. Tuning around, I found what appears
> to be the fundamental at 20445.11 kHz. The freq's are with rig on CW normal
> - the freq's listed change with mode. Turning P3 off makes no difference.
>
> I would like to get rid of these or minimize the levels - any ideas?
>
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