There are a couple things can affect a power line noise sources ability to
peak at a particular freq. They are:
1. The receiving antennas resonant freq. has a band width, however every
antenna works best on one freq. You may have just found that freq.
2. The noise source also has many antennas. The particular radiator/antenna
that is radiating the noise closest to the receiving antenna may be more
resonant on the freq. that you are peaking the noise on.
However, we are assuming it's power line noise. I'd like to hear it.
Best wishes,
Michael C Martin
RFI Services
6469 Old Solomons Island RD
Tracys Landing, MD 20779
240-508-3760
mike@rfiservices.com
www.rfiservices.com
-----Original Message-----
From: rfi-bounces@contesting.com [mailto:rfi-bounces@contesting.com] On
Behalf Of Pete Smith
Sent: Saturday, December 08, 2007 5:23 PM
To: rfi@contesting.com
Subject: [RFI] powerline noise that seems to peak in frequency
Today, listening on 10m, I noticed that whenever I tuned into the 28400-475
range, there would be a marked increase in what sounded very much like
ordinary powerline noise. Trouble is, I'm not aware of any mechanism that
could account for this "peaking" in a certain frequency range. I have
checked the rx, and it has the same apparent sensitivity in that range as
elsewhere in 10m.
73, Pete N4ZR
The World HF Contest Station Database
Full details on 3435 contest stations - hundreds of new and updated listings
Just updated 11/27/07 http://www.pvrc.org/WCSD/WCSDsearch.htm
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