Hi. I'm Jimi, the guy who made the comment about the voice operated transmitter. As I said, I am a ham radio operator. The slip up I immediately noticed is that the radio they were using to communicate with was a receiver. They were using it as a transceiver (transmitter/receiver). I know because you can plainly see that it is a Heathkit SB301. I built one (it came as an unassembled kit) in 1967 and listened on the ham bands bands (frequencies) with it until I got my license in 1968. Then I bought an SB401, which is a transmitter. As I watched the movie I wondered how they were going to show how or where they plugged the microphone in, since on a receiver there is no jack for a microphone. They never show where the cord plugs into the radio. Heathkit no longer produces these kits.

Jimi

P.S.

This is easy to check out by going to www.google.com, and entering - heathkit sb301.