[Milsurplus] Radiating receivers

[Brooke Clarke]

Hi:

In the book "Spy Catcher" Peter Wright goes into some detail about how 
MI5 used receiver LO radiation.

A key application was that the Russian embassy monitored the the numbers 
transmissions coming to London.  By listening to the embassy LO 
radiation they could figure out the signal frequency and when the 
transmission was active.  This could be correlated with another receiver 
LO radiation by using an airplane flying over London looking for the spy 
receiver LO radiation.

In another case they used it to determine that the Russians were 
listening to the radio coms of the units following people coming out of 
the embassy.  i.e. they knew who was being followed and who was not 
being followed.

-- 
Have Fun,

Brooke Clarke
http://www.PRC68.com