On Feb 24, 6:29 pm, "Stefan Wolfe" wrote:
"terry" wrote in message

ps.com...

Old codgers still using spark
transmitters and coherer receivers, pounding away in their dimly lit
shacks late at night and boasting about how many countries they have
contacted for 500 milliseconds per contact; and please QSL.

Can you imagine that? People could communicate around the world simply by
constructing a simple transmitter salvaged from a Model T ignition coil and
a receiver contructed of metal filings in a glass tube between antenna and
ground and a battery powered relay.

Amazing. Absolutely amazing.


Yes, with the most basic materials; little more than a battery and
some wire, in an emergency or primitive conditions you can communicate
via wireless. But you must have one more thing; gotta have code