I have had one for over 20 years. First thing I did was to disconnect the
"rabbit ears" and connect the input to a BNC connector. I use a 4 element 144
mhz. Works just fine.
MFJ also makes an ultrasonic detector with a parabolic dish. This has not been
useful (yet).
Neal, K4EA
On Thu, 06/25/2020 06:52 PM, Mike Ryan <mryan001@tampabay.rr.com> 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 [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.
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|