[Elecraft] plexiglass

[Alexandra Carter]

In my reading about green radios I can't afford (but want anyway) and  
in various readings I've heard that detecting the 455-kHz LO of a  
superhet isn't all that hard, and that for instance in countries that  
require a radio license, they use such techniques to check if people  
in their houses have radios (or TVs) that they're not on record of  
having licenses for! And, in a lot of the military radios, the  
shielding is VERY good so that detection is much harder to do.

73 de Alex NS6Y.

On Jul 9, 2006, at 5:29 AM, Gil Stacy wrote:

> "But the German radar detector receivers used supperregenerative
> detectors,which radiate a weak signal."
>
> Don't know whether this is apocryphal or not, but I had heard from a
> former USAF EW tech that the VC in Viet Nam in the early days  
> figured out
> how to make U.S. field superhets' LO "howl" , giving away qth,  
> causing some
> units to switch to TRF technology.
>
> Gil NN4CW