I think that's essentially what they did. I got to go into the transmitter room and see the 1' diameter copper pipe which I was told carried the radiation out and up to the tower, and which not to approach too closely.
This whole story sounds horrifically dangerous and unlikely to be approved of with regards to zoning and building inspectors.
By that, I mean I'm a tad bit green with envy.
My thoughts exactly. If I ever write a hard sci-fi novel I want to adapt this setting somehow.
That would be a circular waveguide. Very common for radar setups.