Loss...not much difference. RG6 Quad is manufactured expressly for the
cable and satellite TV markets, has a foam dielectric and is 100% shielded
and has better characteristics for the application than RG11/U does. My
drop at home is well over 250 feet, and is then split nine ways in the house
for the various room drops, and signals are very strong, easily meeting the
test meter levels the installers use, at the ends of all the split runs.
I'd stick with RG6 Quad or 1/2" 75 Ohm TV hardline, which is pretty much all
the cable companies use. The 1/2" aluminum TV hardline is cheaper than
mil-spec RG11/U and has much better characteristics at VHF-UHF. Whether you
could pull it through conduit depends on how big, and how full the conduit
is, I suppose...
Are you doing something unusual, that requires you to run these lines
yourself? 'Round these parts, if you're a paying cable TV customer and need
lines run, they do that for you, and for free. -WB2WIK/6
-----Original Message-----
From: Les Kalmus [mailto:w2lk@earthlink.net]
Sent: Wednesday, February 09, 2005 10:17 AM
To: TowerTalk; Jim Lux
Subject: [BULK] - RE: [TowerTalk] RG-11 Source?
I am not hung up on RG-11. I have 2 runs to do from the road to our
buildings. One is about 200+ feet and the other about 250+. The lines will
be through existing conduit and I really want the lowest loss stuff I can
get. I thought RG-11 would be lower loss than RG-6.
Les
-----Original Message-----
From: Jim Lux [mailto:jimlux@earthlink.net]
Sent: Wednesday, February 09, 2005 12:54 PM
To: w2lk@earthlink.net; TowerTalk@contesting.com
Subject: Re: [TowerTalk] RG-11 Source?
At 09:14 AM 2/9/2005, Les Kalmus wrote:
>Tower Talkians,
>
>Anyone have a good source for quality RG-11?
>
>I need to install a moderately long run for cable tv.
Out of curiosity, why RG-11 (which is solid dielectric and 1/2" in
diameter) as opposed to, say, one of the new low-loss foam dielectric RG-6
types (which are smaller and lighther weight?
I'd think you'll pay more for the RG-11 (unless it's some manky old
surplus), just from the increased mass.
There are "11 type" coaxes with foam dielectric, of course. Just paging
through the Belden catalog...
Belden 1523A is a 0.4 inch 75 ohm coax. 2.15 dB/100ft at 300
MHz. Compare to a "6 type" foamed dielectric which is around 3.4 dB/100ft
at 300 MHz
For comparison, Belden 8261 is an RG-11/U type with solid PE dielectric is
about 2dB/100ft at 200 MHz and 4.2 dB/100ft at 400 MHz. The foam stuff
runs around 2.5 dB/100ft at 400 MHz.
Jim, W6RMK
_______________________________________________
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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