[crashryan]

I was curious so I researched these things. The two handsets were connected by electrical wire but there were no batteries.

I wonder if there was some kind of magnet setup so that talking into the microphone generated enough current to move the speaker on the other set. They don't seem to be literal "tin cans on a string" because the wire connects to a set of lugs at the base of each handset, not directly to the diaphragm. Has anyone used these?

Link to the book: Voodoo 12

[jimmm kelly]

In the '60s I got a Batman walkie-talkie as a present that was two plastic walkie-talkie shaped handsets connected by a plastic tube. No electronics. The tin can on a string concept worked with them. Tin cans on a string shouldn't be sold short--they work according to basic mechanical principles of physics (see acoustic telephone and speaking tube).