If you are looking for a nice RF quiet place to build a station do not
build it near a medical facility. I work in hospitals mainly and without
fail my scanning VHF/UHF rig in my car will lock up on trash in the parking
lot.
On Wed, Jul 19, 2023, 21:21 AA5CT via RFI <rfi@contesting.com> wrote:
> The last year and a half/two years (roughly) has seen the use of the 600
> MHz bands, with
> an attendant increase in interference to my pocket portable AM/FM Sony
> radio.
>
>
> When within line of sight of the local, nearby water tower all manner of
> clicks and buzzes arenow quite apparent, and as this wasn't the quite the
> case a couple years back when 600 MHzhad not been used yet, I attribute
> the interference to the use of that band.
>
> I also note some interference (images, most likely) to several, but not
> all, general purposepublic safety scanners such as the Uniden BC895XLT. The
> high-IF Radio Shack Pro-2006seems to be less affected than the Uniden model.
>
>
> A quick look a year back at the 600 MHz band with the HP 8591E Spec An
> revealed 600 MHz signal levels roughly 10 dB above the usual 869 - 894 MHz
> cellular signals.
>
> de AA5CT Jim
>
>
> On Wednesday, July 19, 2023, 8:31:18 PM GMT-5, Steve Maki <
> steve@k8lx.org> wrote:
>
> Hi Jim,
>
> In less populated areas (actually all areas) the 700 MHz, 800 MHz,
> 1.7/2.1 GHz (AWS), and 1.9 GHz bands are *prime* real estate for the
> telcos, including 5G tech. In densely populated areas there's a lot of
> data traffic on 2.5 & 3.5 GHz, and some on 28 gHz.
>
> -Steve K8LX
>
> On 07/19/23 7:31 PM, Jim Brown wrote:
> > On 7/19/2023 3:20 PM, Gene Smar via RFI wrote:
> >> Maybe your peer's friend can call his electric utility company's
> >> RFI finder person.
> >
> > I could be wrong, but I think 2.4 Gig is the lowest frequency range
> > used by cell phones in NA, and the sites use antennas with a very
> > narrow vertical pattern, designed to shoot over the heads of folks in
> > the near field. Unless one of the antennas is very close and fairly
> > low with respect to the victim, the most likely RFI would seem to be
> > radiated by poorly shielded electronics or power supplies. The latter
> > is what I'd expect the power guys to know about.
> >
> > 73, Jim K9YC
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