[Elecraft] OT P3 look at a 18 meter intruder

[Al Lorona]

That's very cool, Bill. The spectrum shows a line every 50 Hz... that's the 
pulse repetition frequency. If you had opened up the span wide you could have 
measure the distance from the signal's peak to the first null and that would 
have told you the pulse width of the radar. I wonder if you could have jammed it 
by sending dits at 50 Hz? That's how hams fought against the original 
"Woodpecker". The Woodpecker would seem to move to another frequency if it 
encountered dits sent back to it but that was never really confirmed.

Al  W6LX