[Milsurplus] LO DFing, the myth that never dies!

[Gene Smar]

Gents:

     Then, of course, there are RADAR detector detectors: 
http://radar.757.org/  .


73 de
Gene Smar  AD3F


----- Original Message ----- 
From: "Rod Hogg" <revcom at wbsnet.org>
To: "'James Duffer'" <dufferjames at hotmail.com>; <rafantini at salisbury.edu>; 
"'Miliysty Surplus'" <milsurplus at mailman.qth.net>
Sent: Wednesday, December 02, 2009 5:38 PM
Subject: Re: [Milsurplus] LO DFing, the myth that never dies!


> Buddy of mine was in England with Air Force years ago and tells of the
> "telly tax" and the DF vans checking on 'tax payers'.
>
> Rod
>
>
> -----Original Message-----
> From: milsurplus-bounces at mailman.qth.net
> [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of James Duffer
> Sent: Wednesday, December 02, 2009 4:21 PM
> To: rafantini at salisbury.edu; Miliysty Surplus
> Subject: Re: [Milsurplus] LO DFing, the myth that never dies!
>
>
> While stationed in Germany in the 60's there was a tax on TV's and there 
> was
> a van that went around that would detect a television receiver in the
> German's residence for taxing purpose.  The government housing was of 
> course
> exempt. Apparently the TV's Local Oscillator was strong enough to be
> detected.
>
>> From: RAFANTINI at salisbury.edu
>> To: milsurplus at mailman.qth.net
>> Date: Wed, 2 Dec 2009 14:11:10 -0500
>> Subject: [Milsurplus] LO DFing, the myth that never dies!
>>
>> With the development of the superhetrodyne receiver, modern style multi
> grid tubes, and the minimal amount of shielding between stages that almost
> every commercial or military receiver had by the mid thirties not to 
> mention
> active RF stages that provide isolation from the mixer find it highly
> unlikely that much can be obtained or be of use from embassy listening at 
> a
> distance of over several feet. Maybe in the teens and twenties when they
> still used regenerative receivers or some bread board triode stuff but not
> beyond that.
>> Ray Fantini KA3EKH
>>
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