OT P3 look at a 18 meter intruder

[Bill Hammond]

Just a little advertising for the best station accessory I have ever bought.  Without the frequency domain analysis we would be hard pressed to discover what this is.   A picture is worth a thousand words.

Video with audio.  K3 set to CW 2.7 kHZ BW
http://www.flickr.com/photos/ak5x/8467460381/in/photostream
http://www.flickr.com/photos/ak5x/8467465985/in/photostream

Bill Hammond
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Bill Hammond-AK5X
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K3 #69
P3 #817
KPA500 # 149
K2/100 #4637
K1 #2033
KX1 #1023
KX3 #583
W2
T1

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[alorona]

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
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