It was almost 30 years ago that I found an annoying 2-meter noise source
on a pole adjacent to the control tower at our local airport. it was
necessary to go up to 440 MHz (AM mode) and I've since used 900 and 1200
MHz yagis on a few difficult MV sources.
FWIW, that was one complaint that got answered QUICKLY.
Cortland
KA5S
On 8/8/2012 1027, EDWARDS, EDDIE J wrote:
> Hisashi,
>
> I think one of our techs at work who is also a ham assembled an ultrasound
> kit with a dish. He found it really didn't work well enough to be much help
> doing RI tracking on electric power poles. He found that using higher RF
> freqs worked better in his case.
>
> At work we just purchased a new ultrasonic receiver from Radar Engineers to
> replace our old broke down UE Systems unit. Once our RFI tech gets some
> experience with it, I'll try to give an update on it sometime.
>
> 73, de ed -K0iL
>
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