Diathermy
Charlie WK3Y will talk about this Radio Device
End Fed Antennas
https://ve3ips.wordpress.com/2021/11/02/the-best-random-wire-antenna-lengthsrandom-wire-lengths-you-should-and-should-not-use-jack-ve3eed-sk/ https://udel.edu/~mm/ham/randomWire https://k7mem.com/Ant_End_Fed.html http://webclass.org/k5ijb/antennas/End-fed-multiband-antenna-BalunDesigns.htm https://w5ias.com/LargeFiles/End-Fed-Long-Wire-W5AWS.pdf ...
