|[AMRadio] Buzzies and hash all over the spectrum|
ranchorobbo at gmail.com
Tue Mar 16 11:44:01 EDT 2010
I have been saying for the past six months or so that about the only
solution to the appliance RFI problem is every man for himself, i.e.
put up a low noise rx antenna, employ a phase shifting nulling box on
receive, and forget QRP or even 100 w. Everyone has to raise the
desired signal level by running legal limit. The unintended
consequence of the FCC blowing off their duty to enforce RFI
suppression in consumer products is simply that everyone will start
running a lot more power on transmit to get over the high noise floor.
If that causes more RFI _to_ part 15 devices too bad for them. FCC
should have thought of this before they let big product manufacturers
and vendors have their way. This QRM has to be dealt with the same
way SSB QRM is dealt with--more power, bigger antennas, more audio.
On Tue, Mar 16, 2010 at 10:04 AM, <sbjohnston at aol.com> wrote:
> Don wrote:
>>I'm far more concerned about all the consumer crap on the market
> to-day that
>>dumps buzzies and hash all over the HF spectrum, with apparent
> impunity .
> This as a VERY serious problem for all radio users - there seems to no
> longer be any interest in control of incidental RF radiators. For
> example, when I got an FCC field engineer to come out and test some
> noisy LED traffic signal systems, he said (paraphrasing), "Yes, I can
> see none of these are meeting Part 15 requirements, but hey, people can
> just listen to the stronger signals that get over the noise." And
> shrugged and went back to the office.
> I did a study of the noise problems for FM broadcast reception due to
> locally-generated noise. You guys might find it interesting as it
> really applies to the whole spectrum (I just needed to focus on our
> industry in particular). I've posted a copy of the resulting paper on
> my website at
> Steve WD8DAS
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