[CW] SOS Timeline

D.J.J. Ring, Jr. n1ea at arrl.net
Mon Feb 21 17:27:13 EST 2011


I came across a google time line search.  I was searching for articles on
the Telegraphone an early wire recording device invented by Danish engineer
and inventor Valdemar Poulsen - he invented the arc transmitter also.

http://www.google.com/search?q=sos&hl=en&safe=off&prmd=ivns&sa=X&ei=MOViTYb-NYGs8Aado93kCw&ved=0CHEQpQI&tbm=&tbs=tl:1,tlul:1850%20AD,tluh:2011


David J. Ring, Jr., N1EA <http://www.qsl.net/n1ea/>
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A1-OP <http://www.arrl.org/a-1-op>, ex-FOC 1271 ARRL-LM<http://www.arrl.org/>
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