Renee,
I found that a lot of RFI is caused by RF currents flowing in AC power
system of my house. These currents apparently came from current induced (or
coupled) into the shield of the coaxial feed line from my antenna. I
installed a choke type balun at the antenna and a AC line filter at my
transmitter. This elininated the problem. The balun that I used came from
the Wireman , http://www.thewireman.com/ , in South Carolina and the filter
from ICE (Industrial Communications Engineers) http://www.inducomm.net/ .
The ARRL has a good book on RFI - The ARRL RFI Book.
I hope this information gives you some assistance. Please let me know if
you have specific questions.
73,
Robie - AJ4F
----- Original Message -----
From: <NZ8C@aol.com>
To: <rfi@contesting.com>
Sent: Wednesday, February 07, 2001 1:09 AM
Subject: [RFI] Apartment RFI problem
>
> Hello all!
> I am hoping someone here can help us out. My husband and I are both hams.
> Currently we are running an Icom 756Pro into either a random wire or a
> vertical, depending on the band. We live in a 3rd floor apartment which is
> the top floor in this building. The antennas are up on the roof. Because
of
> our location grounding is a problem. We seem to have problems using the
> longwire on 40 and 80 meters as we are getting into phones and TVs. On
> 10/15/20 meters using the vertical we get into AM radios and phones. Is
there
> anything we can do or filters we can buy that can help eliminate these
> problems?
> 73,
> Renee
>
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>
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