[TowerTalk] house wiring ...rfi reduction

[Bill Hider]

Chris,

For the telephone wiring, use 4-pair, shielded cable and insert a
K-Com filter *in the wall* at every telephone jack (in series with the
daisy-chain, not in series with the outlet jack.
That will do two things:
1) reduce RF input to the cable by using the shielding and; 2) not allow the
cable
to look like an antenna.  The K-com filters will trap the FR and not let it
pass to the phones.
Some will say that using the shielding is redundant if you break up the
cable with K-coms,
but stubborn cases still exist where shielding is necessary.  Tie the
shields together and ground
them all at one point - the interface block at the house entrance.  Then tie
that to your single point ground (SPG) .

For the data wiring (Ethernet, etc) use shielded Category 5e wiring. with
home runs to the Router/Hub from each
data jack.  Again, ground the shield at the Router or Hub.

As far as the AC power is concerned, your licensed electrician will follow
the building codes in your area.
I, personally, would not use toroids in the AC wiring.
Check out what I did in my house (link below), to tie the AC into my SPG.
While this is for lightning protection,
it helps keep the RF out of the wiring as well.

All of the above grounds should be tied to the SPG of your ham shack/house.
For more detail on this, see my Website: www.erols.com/n3rr Click on:
"Lightning Protection Subsystem".

73,
Bill, N3RR

----- Original Message -----
From: Chris Adams <n4vi@arrl.net>
To: Towertalk <towertalk@contesting.com>
Sent: Sunday, June 10, 2001 8:45 PM
Subject: [TowerTalk] house wiring ...rfi reduction


> Towertalkians!!  ...
>
> Although officially we're doing a house "remodel" for all practical
> purposes it is new construction.  Since the house wiring will be all
> new, I have the opportunity to use various rfi reducton techniques on
> the AC power wiring, telephone wiring and any internal network wiring.
>
> The first thing that occurs to me is to use some type of toroids on the
> lines mentioned above.
>
> Has anyone done anything like this?
>
> Any suggestions?  I'd love to hear them.  Sooner is good!
>
>
> thanks es 73's
>
>
> de Chris, n4vi
>
> P.S.  If you subscribe to the RFI reflector, I apologize in advance for
> the duplcate post!
>
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List Sponsor: Are you thinking about installing a tower this summer? Call us
for information on our fabulous Trylon Titan self-supporting towers - up to
96-feet for less than $2000! at 888-833-3104 <A HREF="http://www.ChampionRadio.com">
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