RF "sniffer" side tone generator

[Kenneth G. Gordon]

On 19 Dec 2006 at 13:47, Keith Harvey wrote:

> Recently exchanged posts re a "side tone generator"
> that will work with boat anchors led me to offer this
> solution.

There have been many, many RF actuated "Keying Monitors" 
published in many ARRL Handbooks over the years.

I distinctly remember one that used a very short antenna, was set 
up in the shack anywhere you wanted it, used two transistors, and a 
diode, among other components, and was wired into the audio 
circuits of your receiver. In fact, I think I could almost draw the 
schematic for it out of my memory.

I am sure that a search of the ARRL website would turn up several 
such circuits in old QST magazines.

As soon as I can, I will post some references here.

Ken Gordon W7EKB

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