[Milsurplus] L.O. radiation

[Ralph Cameron]

There have been several documented cases of radio agencies locating clandestine operations from receiver L.O. emissions. In some cases they were able to determine the actual frequency being received. 

The Canadian military has a requirement for a specified minimum radiated signal ( in dBw) for spectrum analyzers and the same holds true for intercept receivers. Maybe they believe in myths. 

73 
Ralph VE3BBM