[Microwave] Doubling from 12 to 24 GHz

[Dave Brown]

I'm looking, ideally,  for some surplus piece of hardware that can be used
(with a retune?) to do this.  I have up to several  watts at 12 GHz
available from an amp ex some surplus analog TV link gear and want to use
that doubled to make a 24 GHz  TX. I can generate a good stable 12 GHz drive
signal for the amp so that's no issue but wondered if there's some surplus
piece of gear around to use for the doubler stage. There's nothing like this
available down here in ZL. The 12 GHz amp output is SMA, but I expect
anything surplus that could be used for a doubler would likely  be waveguide
input-  again, no issue,  as I have 12 GHz and 24 GHz  coax to w/g
transitions available.
 I can also come up with several watts at 8 GHz and triple, if surplus  gear
to triple with is more readily available.
 All suggestions welcome.
 73
 Dave, ZL3FJ