A little Morse?
David wrote, “Here are a few recordings made at the time of the centennial of the trans-Atlantic spark transmission by Marconi. VE3BBN had permission to use spark on 80m amateur radio band.
All he was allowed to send was what you hear repeated over and over!
The one spark.mp3 appears to be close enough to hear the musical note of the spark. Probably done by diode detection at the VE3BBN site.”
More info here: https://www.qsl.net/g4rfr/marconi.htm
Thanks David for sending this one in. Regards Martin VK3TMP / Ed.