My answer, Kurt, would be that there is no one answer to the polarity
question.
Depending on the noise source, it could be anything.
A brief 19-second video shows an example of why 'changeable' polarity is
important when tracking down noise sources:
http://www.youtube.com/watch?v=nMKYDQTSXkY
Agreed on using a vertical (2m or 70cm mode AM) on a car to get close to the
poles, and then a handheld Yagi (again 2m or 70cm, with HT in AM mode) to
make sure you narrow down the exact pole(s).
Dave N0RQ www.powerlinenoise.com
-----Original Message-----
Which would be better for general purpose long-range (relatively) sniffing?
Yagi? Horizontal or vertical?
Helical?
Cross polarized Yagis?
I'm getting an idea for a sniffer on a vehicle, pointing upwards, camera in
line with the antenna...
Kurt
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