XR0ZR working Europe on 40m CW (2013-11-17 @0700 UTC)
Spark Gaps and Coherers demonstrated and Measured by CuriousMarc
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*CuriousMarc provides a good demonstration of how spark transmitters work
with coherer detectors. His measurements are really illuminating. His
device j...
12 hours ago






(From 1978 WRTH)
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