As I recall that MJF handheld noise 'sniffer' is actually on the 137mhz band
(just above the air band I think?) I've used those to some extent though
the recvr is not selective that's actually a good thing! - M
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Steve
Maki
Sent: Thursday, June 25, 2020 5:04 PM
To: towertalk
Subject: Re: [TowerTalk] Topband: RFI
Many years ago when I had a bad location for line noise, I used a
wideband scanner that could be kept in AM mode over the whole range of
frequencies, and a small VHF/UHF TV log-yagi with a battery powered
preamp. As you get closer and closer to the noise source you can start
picking up the noise up around 450 MHZ and higher, and it's much easier
at higher frequencies to pinpoint the exact pole. Never tried an
ultrasonic RX, but that sounds like it should work well. When you get on
top of the source, you can often hear it plain as day with no device at
all, just your ears.
Yes I was asked a couple times to remove myself from someone's property :-)
-Steve K8LX
On 06/25/20 16:25 PM, Don Kirk wrote:
> Hi Fred,
>
> Do you have a police radio scanner that covers the aviation band? If so
it
> makes for a great 136 MHz AM receiver that can be very helpful in
narrowing
> in on the faulty pole especially when a portable directional antenna is
> connected to it (especially if you can throw in 20 or 30 db of attenuation
> when very close to the pole).
>
> HF makes identifying the faulty pole a very difficult if not impossible
> task.
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