[BC] German Radio Spying 1938

[Lotus Engineering]

        45+ years ago in college is used to P.O. the program director of the college Carrier current station where I was chief engineer by tuning my radio 455 KHz above the 600 KHZ college station.  I was in the adjacent room in the dorms, and it would always result in a call that something was wrong with the station.  I'd give him a few minutes, tune off and he'd think I was a hero for solving the problem.
        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

-----Original Message-----
  From: Stephanie Weil

On 6/8/12, Harold Hallikainen <harold at hallikainen.com> wrote:
> but radios of that time had
> terrible local oscillator radiation. I had a radio of that vintage
> when in high school. As I tuned around, the LO would land on the
> station my mother was listening to and wipe it out.

Even some modern-day radios have that problem.  On FM!  I had a Kloss Tivoli Model 1.  At certain frequencies, the LO would blot out spots
on other FM radios in my apartment.   And i Even out into the hall.
Pretty annoying.  And it wasn't just THAT one radio.  Every sample I tried of that model did the same thing.

--
Stephanie Weil
KC2TJB Radio
New Bern, North Carolina, USA