[Elecraft] Tx spurs?

[Jeffrey Parker]

I recently finished my K2 (3576) and K2/100. Today I received an
alarming call from a fellow ham about 50 miles away. My transmit
frequency was 21035 MHz. My friend copied me on 21077, 21056 21035,
21013.5 and 20992. I was very surprised and am quite concerned. We tried
the experiment at 0.1, 10 and 100 watts with the same results.  These
are all separated by ~21 KHz. Has anyone seen this before? Any ideas?

Thanks.

Jeff
parker@kmr.ll.mit.edu