Thanks everyone; I compiled your replies into a response.
On Thu, Jul 20, 2023 at 11:39 AM Jim Rhodes <jimk0xu@gmail.com> wrote:
> 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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