Creative Commons Attribution-Share Alike 4.0 truetrue English Massie Wireless Station PJ (1907) URL: https://commons.wikimedia.org/wiki/user:Mu301 Wikimedia...
truetrue English Recording of recreated transmission of Massie Wireless Station "PJ" sending "CQ DE PJ" as done by Dr. John S. Belrose, VE2CV. Wikimedia username:...
Creative Commons Attribution-Share Alike 4.0 truetrue English Massie Wireless Station spark gap transmitter author name string: Michael L. Umbricht Wikimedia...
