"Brenda Ann" wrote in message
...

That would be the original Kahn system. I forget the exact name of it.
XETRA
used it for many years, and if you had two radios you could tune off
channel
high on one and low on the other and get stereo separation. I listened to
it
occasionally. It wasn't great, but it was an interesting novelty at the
time.




Could you get both left and right audio channels when using two radios which
had their detector diodes installed with the same polarity?

Frank Dresser