I just watched The Spy, a Netflix series about Eli Cohen, an Israeli spy, that takes place in the 1960s. Throughout the series he uses a small transceiver and a straight key to communicate from Syria. There is also a scene where he's near the border and uses an HT. I'm curious if anyone here knows more about the radios. What frequencies was he using? What gear? Antennas? Would encryption have been used? What was that straight key? What gear and tactics were the Syrians using to catch him?