I should have made that clear, yes you start off at lower frequencies,
and gradually tune higher & higher as you get closer to the source. I
found it to be the fastest method with what I had at the time to home in
on the trouble. The problem is that in certain band segments it's hard
to find a quiet channel to listen for noise on, which means you need a
quality receiver with some semblance of selectivity.
-Steve K8LX
On 06/25/20 18:52 PM, Mike Ryan wrote:
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
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