I know you're speaking to Phil, but I worked on the American space program
in Australia, installing and tuning a new klystron at the Orroral Valley
site.

Do you remember how many watts it handled?

I believe the maximum output was 20kW. They were built by Varian whose chief
engineer was one Mr Goldfinger. Really. He gave me the clue I needed to figure
out why we couldn't tune the klystrons.