[BC] German Radio Spying, 1938

[radioran at aol.com]

<<  I also recall back about 10-15 years ago, someone sold a modified
scanner that would tune 10.7 above the FM broadcast band.  I knew at least one
GM who used to sit in his car at a busy intersection with it on the correct
frequency for his station to see how many cars driving by could be detected on
that device.
Bill>>
 
Poor man's Arbitron, indeed!
Back in the '70s, in Central Washington, there was a fellow named "Buzz" Barr.  He marketed a listener survey service called the "Barr-ometer".  He'd drive through neighborhoods, reading the LO radiation of any sets in use, and come-up with a potentially realistic audience rating.  No accounting for the lady who left the radio on for her canary, however...
Cheers!
Randy Wells
Various
Santa Rosa, CA