Jef wrote:


Spurs are highly unlikely with a cavity based device like a magnetron.

Sidelobes are an artifact of antennas, not oscillators, unless you are
talking about modulation sidelobes which are pretty trivially dealt with
in a pulse device.

The frequency stability of a magnetron is highly correlated to the
power supply, i.e. the anode voltage.

The power supply and pulse control of an oven would be useless for any
sort of communications, so one would need to build one that pulled
the frequency down into the amateur band and provided for some sort of
modulation scheme.

The simplest modulation would be very high speed CW.


Some years ago a local ham injection locked his microwave oven and
produced a pretty stable source in the 2.4GHZ band.

Jeff

That would be the smart thing to do if one wants frequency stability and
these days it is pretty easy to do.