I once looked at a microwave oven on a spectrum analyzer (Loosely coupled
near the door seal). The signal was spread over 100s of MHz. It also
appeared to be pulsed. The spectrum, however, did not look like the
expected Sa(x) distribution. Magnetrons are not noted for their stability,
and are
probably not suitable for CW. I have played with tunable 500 mW klystrons,
and they can drift 10s of MHz (at 12 GHz), in a very short period of time.

73,

Frank

PS I often post responses, and never see them. That is why I started a new
thread. Anybody else get the same problem?