-=> Quoting Paul Westell to Tom Walker <=-

 PW> It certainly looks like almost anything will work with
 PW> waveguide tubes. Perhaps it is just my construction, but
 PW> for all the effort involved it seems anyone can stick a
 PW> wire in any tin can and have it work about as well as my
 PW> more carefully engineered efforts. Perhaps there is a
 PW> precision threshold i have yet to breach.

 I wish I still had my waveguide notes and textbooks from the
 Navy.  But I do remember how the dimensions of waveguides'
 walls and the dish affected the signal, very much like the
 construction of RG transmission lines and antenna for
 radio/TV transmitters.

 It's possible to lose power out (ERP) with signals reflected
 back to the transmitter feeding a waveguide, just like those
 standing waves on a transmission like reflecting back to a
 radio/TV transmitter.

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