[TowerTalk] 300 ohm shielded cable

[Bob Wanderer]

Actually CATV drop cable usually sports a copper clad single aluminum wire
for the center conductor.  Some specialty cable will be aluminum only for
the center conductor.  Drain wires aren't used because of the way the F
connector is attached.  The shield is usually dual (foil-braid) tri
(foil-braid-foil) or quad (foil-briad-foil-braid).

73
Bob AA0CY

-----Original Message-----
From: K0FF [mailto:K0FF@ARRL.NET]
Sent: Monday, May 29, 2000 11:43 AM
To: Bob Wanderer; KB7WW Art Moe; Tower; Ant
Subject: Re: [TowerTalk] 300 ohm shielded cable


a wire like that in the foil is called a drain wire, and is the connection
for the shield.  A messenger wire is imbedded into the black plastic and
does not touch the shield. Can't say I've seen stranded with steel core
wires though. Usually catv cable has a single copper coated steel core, or
stranded copper. Any combination possible though, I gess.

K0FF
-----Original Message-----
From: Bob Wanderer <aa0cy@VRINTER.NET>
To: KB7WW Art Moe <kb7ww@chatusa.com>; Tower <towertalk@contesting.com>; Ant
<antennas@qth.net>
Date: Monday, May 29, 2000 10:37 AM
Subject: RE: [TowerTalk] 300 ohm shielded cable


>
>Sounds more like "messengered" 75-Ohm cable TV drop cable.  The messenger
>(or strand) is used for strain relief between the tap port and the house.
>The cable would probably be RG6-type although it could be RG59-type.  Other
>possibilities include "RG7," RG611," or RG11-type.  The ones in quotes are
>"hybrid" cables for the cable TV industry along thje lines of RG8X -- They
>are physically the size of RG6 but their attenuation characteristics are
>closer to that of RG11.
>
>73
>Bob AA0CY
>
>-----Original Message-----
>From: owner-towertalk@contesting.com
>[mailto:owner-towertalk@contesting.com]On Behalf Of KB7WW Art Moe
>Sent: Monday, May 29, 2000 5:12 AM
>To: Tower; Ant
>Subject: [TowerTalk] 300 ohm shielded cable
>
>
>
>
>A spool of the above followed me home from a ham feast and I would
>like to try to find out something about it. So here is a description
>in hopes that someone can help.
>
>Black jacket
>Foil with messenger wire mabey not the right term but a wire in
>the foil
>Foam installation
>Stranded wires that appear to be copper clad steel
>
>
>Any one have a clue ???
>
>
>Art
>KB7WW
>
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