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Author Topic: 1995 Commscope Inc.  (Read 899 times)
VE1FZ
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Posts: 3




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« on: April 04, 2010, 11:00:38 PM »

I have some hard line I think. Its coiled up and it stiff. Has white line down the center . Have about 60 feet and the only thing written on it is 1995 Commscope Inc and the lenght number . Have pictures that might make it easier to tell.

Anyone ? My e-mail is

ve1fz@email.com if you like to see it

73  Tim
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N7NBB
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Posts: 381


WWW

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« Reply #1 on: April 05, 2010, 06:18:42 AM »

WOW! not much to go on....
but here is a link (found in about 10 seconds on Google) that lists quite a few COMMSCOPE cables... perhaps, lacking any numbers, you could match the "details"
(type of conductor, shield, jacket, velocity factor, etc) and come up with a "close match".
http://www.arrisistore.com/subcat.php?cat=H&mfg=CommScope
Not the best solution, but perhaps you'll have a bit more information to make an educated guess rather than just a shot in the dark.
good luck
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WX7G
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Posts: 5922




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« Reply #2 on: April 05, 2010, 06:58:14 AM »

If you have an antenna analyzer such as the MFJ-259 you can determine the characteristic impedance. It will be either 50 ohms or 75 ohms.

If you don't have an antenna analyzer but do have an oscilloscope you can determine the characteristic impedance very easily.
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W5RB
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Posts: 565




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« Reply #3 on: April 05, 2010, 08:25:33 AM »

It is most likely P3 cable , in either 500 (1/2") or 750 (3/4") diameter . Copper-clad center conductor inside foam dielectric , inside smooth aluminum outer conductor , may be jacketed or not . Loss for the smaller one is around 2 dB/100' @400MHz , and about half that for the .750 cable . You can download .pdf data sheets  with full specs here :

http://www.commscope.com/broadband/eng/support_document/spec_sheets/coax/1208461_7869.html

Russ, W5RB
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WX7G
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Posts: 5922




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« Reply #4 on: April 05, 2010, 12:48:00 PM »

And the impedance is?
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W5RB
Member

Posts: 565




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« Reply #5 on: April 05, 2010, 04:29:41 PM »

75 ohms . This is trunk or distribution coax for cable TV , if it's what it sounds like . The data sheets show a picture .
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N4AEQ
Member

Posts: 90




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« Reply #6 on: April 11, 2010, 02:11:38 PM »

We don't make any 75 ohm with copper outer shield, we do make both 75 ohm and 50 ohm with aluminum shield
but the 50 ohm will have a date code and Cell Reach
printed on it.
 We dont put a tracer stripe on Cell Reach either, thats a 75 CATV request. Sorry, its still good cable
just hard to match up a connector, 50 ohm connectors have a much larger center conductor than the same size 75 ohm. So 50ohm connectors wont fit, even if they did you would need a expensive coring tool to get the imp right.
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