[RFI] CAT 3 Cable?

[David Hachadorian]

----- Original Message ----- 
From: "David Jordan" <wa3gin at erols.com>
To: "Eric Rosenberg" <wd3q at starpower.net>
Cc: <rfi at contesting.com>
Sent: Thursday, June 17, 2004 3:17 PM
Subject: Re: [RFI] CAT 3 Cable?


> You don't have to replace the wiring.  Get yourself an old AC brut
force
> line filter from one of the surplus electronic warehouses or buy a
new
> one from Arcade electronics.
>
> I used to run 1KW into a 40m loop about six feet from the phone line
> drop.  There was so much RF on the phone line that you could pull an
> arch of the interface terminals with a pencil.  I had seven of those
> K-com filters in series and was still getting RFI on the telephone.
> I took an old 2.5amp 120vac line filter, put the load side of the
filter
> to the phone line and the line side to the telco line side, grounded
the
> metal case of the filter and no more RFI on the house phone lines. I
ran
> Hi-speed data over the line as well without degredation.  The AC
line
> filters provide a good match to the phone line and do a great job
> removing RF.

I tried that once with an 8 amp Corcom line filter, and it noticeably
attenuated the high frequencies on the phone circuit. The modem wasn't
happy with it either. So, your mileage may vary.

Dave Hachadorian, K6LL
Yuma, AZ