开云体育

Tom's book (ISBN 0521835267) is worth it just for the gems like how to
cook your own point-contact copper-oxide detector diodes using a South
Korean 10-won coin.

I have a WW2 US Army high-impedance headset, a WW2 grenade canister and
some period field-telephone wire, plus some 1944 blued razor blades and
US Army No2 yellow pencils to make a foxhole radio for a BBC TV
programme, but that segment was not filmed so I'm making a Youtube video
about it.? I just HAVE to do the "let's cook some coins" practical
demonstration.? Obviously I'll also have to do some vacuum sputtering of
copper on to various substrates, then some controlled oxidation.? It
would be rude not to.

The book also covers inverse Class F amplifiers, filter design and
pieces about the history of radio. What's not to like???? A brilliant
read.? My copy was once the property of the National University of
Ireland Library.? It was only loaned out once, on the 9th of June 2006.
It does have the WITHDRAWN stamp, so it's not the ill-gotten gains of
some pilfering student or impecunious lecturer.

The thug who borrowed it had the temerity to FOLD DOWN A CORNER of one
page.? Probably never read any of the rest of the book.? The gem that
the bookmark pointed to was Friis's cascaded system noise figure formula.

Right, enough fanboi fawning from me. Find the book at a good price.?
Buy a copy.? Enjoy.

Neil