Here was the utmost in simplicity for a detector..

[Uncle Willy]

You just mounted a small transistor radio on it and that was your control box.

Bill

 

[ojm bc]

n/t

 

[Uncle Willy]

I've got a pic somewhere of about 100 all in one pile. Wil see if I can find it. I have a friend who has over 20. I had 14-15 at one time but weeded them out. Only have nine or ten now.

Bill

 

[Mick in Dubbo]

So you get to listen to the radio while you eye ball coins! Not a bad idea. So that's why folks wear head phones. And to think, I thought that they were listening to the detector. Silly me.
Mick Evans.

 

[Old Katz]

Uncle Willy:

So how doe all that work? How did they connect the coil to the radio
and what kind of sound/signal did it give off. Have you ever tried the contraption?
It sounds like it could be a fun project for someone to put together.
Katz

 

[slingshot]

It had a small circuit board, and you tuned the radio to an unused station and would hear a squeal on the station.

 

[Uncle Willy]

Yeah there were two or three outfits that made a transistor detector. Guess it was a cheap way to detect. I got a pic to put up of a tector that cost under $14.00. Don't get much cheaper than that. HAAA.

Bill

 

[Uncle Willy]

It just plugged into the radio and you tuned the radio to an unused frequency and when you hit a target it would make a squealing noise. I ever got a chance to use one. There were at least two companies that put these out, maybe one more. I can't remember for sure.

Bill