Ok, this is not my station.,.,the station (N6TNI) being affected is 8 miles,
(approx) NE of the broadcast tower.
I came here as I am a member here and Dan is not. There are a number of us
trying to help him out with his problem, and I thought I would put forth his
problem here to try and find a solution.
Sorry for the unintentional mislead.
It affects me because he can't hear me over the RFI..even when I crank up
the amp to legal limits..Only a few of the 'very' local yokels can put out
a signal strong enough to get over the interference, and I sure am not local
to him...(There is this very tiny obstacle between he and I..called the
Sierra Nevada mountain range! LOL)
Joe - WA6RKN
----- Original Message -----
From: "Jim Brown" <jim@audiosystemsgroup.com>
Subject: Re: [RFI] AM Radio Interference On 75 meters
On 9/18/2012 9:54 AM, David Robbins wrote:
3960khz is not a harmonic of 1530khz so something else is also happening
here. listen carefully to the kfbk signal and see if there is some other
signal mixing with it. check for other harmonics and other signals that
it might be mixing with to end up on 3960...
Yes. I did some poking on the FCC website. KFBK is 50kW DA2 -- that is,
directional both day and night, different patterns day and night. The
nighttime pattern has deep nulls east and west, putting all of California
in their main lobes. WA6RKN is in Reno, which is 80-100 miles almost due
east of the KFBK transmitter site (which is 32 miles N of Sacramento). If
their antenna system is functioning properly, there should not be much
fundamental in the direction of Reno at night. Obviously that directivity
exists only on 1530, not on the frequencies of harmonics or spurs.
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