[RFI] Vancouver recording studio plagued by RFI in danger of losing clients

[Lloyd - N9LB]

Have you ever been next to a person with a hearing aid then used your
digital 800 MHz cellphone?

I did this and the guy with the hearing aid just about jumped out of his
skin from the shrill buzz my phone produced in his aids.

73

Lloyd - N9LB

-----Original Message-----
From: RFI [mailto:rfi-bounces+lloydberg=tds.net at contesting.com] On Behalf Of
AA5CT via RFI
Sent: Wednesday, June 09, 2021 7:04 PM
To: rfi <rfi at contesting.com>; Rob Atkinson <ranchorobbo at gmail.com>
Subject: Re: [RFI] Vancouver recording studio plagued by RFI in danger of
losing clients


I will have to say, since the rollout of 600 and 700 MHz spectrum LTE
services rounds about last December (2020) I have noticed some increased
'pulse' type interference on some of the RF hardware I use on a daily basis
...

Notable is the interference to a Radio Shack Pro-2006 scanner and also what
must be direct RF rectification of the 4G LTE 'pulse' energy as experienced
on a Sony AM/FM portable radio.

I note the interference on the Sony AM/FM portable at about 1/4 mile out
from a water tower which I have bicycled by for the last year and 1/4, since
last year about March (2020). It has 'picked up steam' since about December
or so last year ... paralleling the 600 and 700 MHz LTE band build-outs by
the cellular carriers.

I also note the strength of the 600/700 MHz RF signals to be on the order of
-40 dBm (30 kHz wide IF I think) on a spectrum analyzer with a 1/4 wave wire
antenna on the input here at the QTH which is less than 1/2 mile from the
same water tower. 

The 800 MHz cellular signals are about 10 dB weaker ... my opinion is it
looks like the 600/700 MHz RF signals are set higher than what the legacy
cellular bands were (and I used to do RF planning in this market once upon a
time).

I have noticed no effects from the 600/700 MHz services on adequately
engineered RF equipment such as GE Mastr Pro UHF repeater or the Motorola
handhelds or the Alinco handhelds I use on a daily basis.

de AA5CT Jim

----------------------------

 
On Wednesday, June 9, 2021, 12:38:26 PM GMT-5, Rob Atkinson
<ranchorobbo at gmail.com> wrote: 
https://www.cbc.ca/news/canada/british-columbia/armoury-studios-plagued-by-r
adio-interference-1.6054498



Rob
K5UJ
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