[BC] All American Five

[Phil Alexander]

Close - in fact correct although they called it a 
gated beam detector. :)

First used AFAIK is some super-secret UHF (if you call it the way
aviation types do - actually upper VHF) radios used in a double
demodulation scheme where an AM subcarrier was FM modulated on
a carrier in the 220 - 250 MHz range.

Later Sarkes Tarzian used it to build a cheap little table model
FM set in the late '50's that sold for $19.95 retail. In fact,
IIRC, the radio used a 12BN6 with series filaments. <g>


Phil Alexander, CSRE, AMD
Broadcast Engineering Services and Technology 
(a Div. of Advanced Parts Corporation) 
Ph. (317) 335-2065   FAX (317) 335-9037


On 10 Jul 2005 at 18:48, Tonne wrote:

> 
> "I do!  I do!" said Jim, waving his arm excitedly to the inquirer.
> "It was a quadrative demodulator."
> -JimT
> 
> > anyone here remember the 6BN6?  Hint: Used in an FM
> > only receiver in the late '50's after it was declassified.







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