Hi,
Yes those were klystron tubes, and I know what you mean by trying to bounce rf off the moon. We once made an antenna out of an old umbrella (steel ribs with tin foil) and picked up the astronauts radio signals out of one of the old Apollo flights. Couldn't believe that our design worked, but it only worked if you followed the signal with a tracker, or tracer, we had to watch the needle to see if the RF was getting stronger or weaker and then move the antenna with our hands until the signal picked up.
Ahhh the good old days.
smerf
