I am not quite geared up yet to make mobile measurements, but do have the
equipment and can go out into the field and make some calibrated measurements.
I haven't followed every post of every topic on this list (gasp!), so does
anyone know of a noisy LED street-light system within a couple hundred miles of
central Connecticut? I will go there and report back what I find.
BTW, the ARRL Lab has two staff openings in the Lab. The Lab wants a ham with
good RF experience, significant amateur experience to be the RF engineer and
they are looking to hire
a ham with digital amateur radio experience to spearhead more involvement of
the Lab with digital amateur radio.
We are also looking for more volunteers to help with various tasks, from
testing of noisy devices, testing of incoming equipment donations, answering
the phone, restoring older equipment, and just being a general assistant for a
number of Lab projects. We also have a number of corresponding volunteers, some
working on projects remotely, so you can help make the ARRL Lab even better if
you want to do this in collaboration with ARRL.
Contact W1GKS@arrl.org if you are interested.
Ed, W1RFI
ARRL Lab Volunteer
________________________________
From: RFI <rfi-bounces+w1rfi=arrl.org@contesting.com> on behalf of AA5CT via
RFI <rfi@contesting.com>
Sent: Wednesday, August 23, 2023 9:27 PM
To: rfi@contesting.com <rfi@contesting.com>; Jim Brown
<jim@audiosystemsgroup.com>
Subject: Re: [RFI] LED Street lights
I don't know where you're coming from Jim. How long has it been since you've
been in the 'field' with a portable SW receiver?
Noisy devices, power poles, even lighting poles all have distinctive signatures
heard when standing near them. The CLOSER you get the STRONGER will be whatever
noise/signal the device *may* be generating. Surely this aspect need not be
spelled out?
I still stand with the advice as a first tier investigation to GET NEAR THE
DEVICE and inspect the ham bands for any anomalous noise. This isn't rocket
science. This e-mail was a response to Eric for advice looking at a NEWLY
installed LED lighting pole. Eric, if you have a SW/HF radio in the car that
might be a way to do a first tier/first pass inspection of the new lighting
pole too.
de AA5CT Jim
---------------------------------
On Wednesday, August 23, 2023, 7:54:53 PM GMT-5, Jim Brown
<jim@audiosystemsgroup.com> wrote:
On 8/23/2023 5:17 PM, AA5CT via RFI wrote:
> Hmmm ... if an exotic receive apparatus is required to 'spot the noise', how
> serious could the noise really be?
Not all noise is broadband. Indeed, most electronic noise is not. And
the receiver cited makes an excellent spectrum analyzer. Most noise is
radiated by wiring, not by the fixtures themselves.
NK7Z's webpage provides lots of excellent troubleshooting advice for
chasing electronic noise.
73, Jim K9YC
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