[Scan-DC] How to build a radio while in a Japanese POW camp
Andrew Leyden
andrew at leyden.com
Sat Jul 4 07:28:18 EDT 2009
Fascinating interview here with a former prisoner of war who built a
shortwave radio receiver while in a jungle prisoner of war camp in
World War II.
http://www.zerobeat.net/qrp/powradio.html
Any DIY radio types want to try and recreate this? They have some
interesting instructions:
"The resistors were another problem. We found out that we could use
the impurities in some of the tree wood and the bark, particularly
cinnamon bark which was available by getting through the wire only
about 2 feet and we could normally pinch that while the Japanese
sentry was moving around.
We used a piece of string with the material rubbed on it from
the burning of the cinnamon bark with some impurities in it (we didn't
have a chemical analysis); we weren't very fussed because most grid-
leak resistors were about a megohm or thereabouts and we had no means
or any way we could measure a megohm, so it was largely a trial and
error thing to see if it would work. We made a number of these bits of
string and tied them round different things to dry them out to get the
thing going. Eventually about an inch, three quarters of an inch to an
inch, was about the right order of things to get about a megohm
resistance."
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