Magnetron

[AhuraMazda]

I see a resonant cavity a bit like a flute so, physically changing the parameters of the cavity would give generate different frequencies.
I would leave the voltage alone.

[Mk1]

I think it would make a great hho electrode.Like the best garbage project!

[Dave45]

I tore a magnetron apart I didnt see anything that resembled the frequency generator that was in the pic

[sparks]

   What is the big energy consumer in these devices?  Does the magnetron need a shitload of current or just voltage?  Whenever I see a whole bunch of steel and copper trying to get high voltage I wonder about the efficiency of such a circuit.
Maybe the current draw is from the filament heating?  If  that is the case couldnt they just boost the voltage and run it cold cathode?  How much current do you need to make radio waves anyway.  Especially ones that bounce around inside a resonant cavity?  Sorry for sounding like Andy Rooney.

[pese]

Some types can be varied mechanical (with screw)
The magnetrons from microwave-ovens cant changed the frequency..
Its allowed oals only that 2,45 Ghz..
what an frequency range you need ?
Needed Power ,   ? watts.
possibly i can find them

Gustav Pese