nice essay

Wow!

I created a pdf of Barrie's essay.

If you don't have that capability send me an E-mail and I'll send you a copy.

...Jim Thompson

A really good read, although methinks he doesn't write as fluidly as jim Williams.

BTW, fig 6a/b looks like commercial equipment. Can't see an 11 year old with no money, being able to knock up a super chassis like that, even though it does use war surplus bits.

There's a (probably rare now) book called '40 years of radio research' by George C Southworth, who was one of the pioneers of waveguide technology at Bell labs and other places. Unfortunately my copy went missing years ago, and I can't recall much of it. Before microwave tubes, their work had to be done with conventional valves, using barkhausen circuits and the like. The frequencies were low enough that their experimental guides had to be water filled for the waves to propagate.

A recommended read if anyone can find it.