Kurt...I have one that you could have fun trying to locate...I never have.
3 years ago, in the late fall, 7 MHz became unusable (Overnight!) due to a
very elevated white noise. It comes on around 11 am or so, and stays in
place until mid evening to midnight, when the white noise drops away. S 1-5
normal in 'no noise' period, 30-40 over during the day.
I have it on multiple HF radios, with house power off or on, no difference.
Walking the neighborhood with various radios does no good. All utilities
are underground, no overheads. Nearest utility box is 4 blocks away.
High tension lines are located 1.5 miles from the house, but no noise near
them when I go mobile. Every now and again, the noise will be absent and I
can hear 'forever' on 7.204! Right now it is 10:51 here and the noise level
is at 5. By noon, it will be 9+ and working the JNN will be impossible.
I should add, that I have no issues on any other band, from microwave (1.2)
down to 75 meters.
Joe -WA6RKN
----- Original Message -----
From: "KD7JYK DM09" <kd7jyk@earthlink.net>
Subject: Re: [RFI] RFI on 1.8 mhz
: 90% of teh RFI sources all sound the same... It has not helped any at
: all for me... I have sen two of teh same thing, by different makers
: sound different...
I have tracked RFI for quite some time and I disagree. Most sound
different
and a source can be found days week and months sooner by knowing what you
are looking for, just by the sound. For example, RFI from a computer
power
supply sound absolutely nothing like RFI from a power line, single phase
is
different than three phase, different from cars, electric signs, cell
phones, another HT in your presence...
Patterns help, if you can see the source, if not, it means little other
than
it's something someone has somewhere, which you already know.
Getting out and sniffing around, with whatever you have, HT, portable SW
receiver, car radio, they all work well. Some things work better, most
things can be found just by proximity.
Kurt
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