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Re: [RFI] RFI on 1.8 mhz

To: "RFI Contesting" <RFI@contesting.com>
Subject: Re: [RFI] RFI on 1.8 mhz
From: Joe <wa6rkn@gmail.com>
Date: Tue, 22 Jan 2013 10:59:52 -0800
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
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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