Belden 8245 Rg-55/U Coax

strider
strider Posts: 2,568
edited November 2013 in DIY, Mods & Tweaks
Have a few pieces of this from some old test equipment I've taken apart, but can't find any info on it. Interested to see if it's good for anything audio related, like interconnects or input/output wiring on amps etc.

Thoughts anyone?
Wristwatch--->Crisco
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  • disneyjoe7
    disneyjoe7 Posts: 11,435
    edited November 2013
    Why not try it, and see?

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  • Speedskater
    Speedskater Posts: 495
    edited November 2013
    Belden 8245???. I have a 1985 Belden catalog and it goes 8240, 8241, 8242, *** 8254, 8255. No RG-55/U cables listed either.
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  • strider
    strider Posts: 2,568
    edited November 2013
    disneyjoe7 wrote: »
    Why not try it, and see?

    Because I only have 4 12" pieces, and if it's some super special stuff I don't want to waste it. :wink:

    Only thing I've confirmed on the interweb is that it's obsolete/no longer being made. One site said it was the same as RG-233/U, but had a non-staining jacket.
    Wristwatch--->Crisco
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  • strider
    strider Posts: 2,568
    edited November 2013
    Speedskater wrote: »
    Belden 8245???. I have a 1985 Belden catalog and it goes 8240, 8241, 8242, *** 8254, 8255. No RG-55/U cables listed either.

    Exactly. It's really old stuff, I found a newer Belden catalog online and I didn't see anything either.

    This stuff came out of some Hewlett Packard test equipment from the late '50s. Vacuum tube voltmeters and oscilloscopes, one of which had stickers from Los Alamos on it. All the parts in them are top notch, beautiful point to point wiring, so I'm assuming that the coax is good stuff as well.
    Wristwatch--->Crisco
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  • pitdogg2
    pitdogg2 Posts: 25,563
    edited November 2013
    I've used Belden RG62a it was good. Ken S. made some for us here, is it the air tube coax? I have used many coax Belden cables and most have been pretty stellar kept up with better name cables...YMMV
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    edited November 2013
    Accordiing to the military spec it is a single solid conductor that is silver covered copper with a dielectric of solid polyethylene and a tinned copper braid shield. The characteristic impedance is 53.5 Ohms and the capacitance is 28.5pF/foot. Definitely worth a try.
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  • zingo
    zingo Posts: 11,258
    edited November 2013
    Can't find anything on it...
    Jake
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  • monepolk
    monepolk Posts: 1,143
    edited November 2013
    As you know you have various cables a couple being indoor and outdoor cable. Outdoor cable can be aerial or underground. The aerial cable had a wire that ran along the side of it so that you could attach it to hangars or drop hooks, the underground did not and looked like the indoor cable. The thing about the outdoor cable that we used a "GOO" that helped seal any small nicks or cuts that outdoor cable was more susceptible to. The problem was this would get on your tv or vcr connetors that the cable was connected to. Before they got smart and changed the color from black to orange to indicate underground they used "U". I don't know if this is the case with your cable but if after you strip it you feel a sticky substance on it I wouldn't use it on my equipment.
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  • pitdogg2
    pitdogg2 Posts: 25,563
    edited November 2013
    monepolk wrote: »
    As you know you have various cables a couple being indoor and outdoor cable. Outdoor cable can be aerial or underground. The aerial cable had a wire that ran along the side of it so that you could attach it to hangars or drop hooks, the underground did not and looked like the indoor cable. The thing about the outdoor cable that we used a "GOO" that helped seal any small nicks or cuts that outdoor cable was more susceptible to. The problem was this would get on your tv or vcr connetors that the cable was connected to. Before they got smart and changed the color from black to orange to indicate underground they used "U". I don't know if this is the case with your cable but if after you strip it you feel a sticky substance on it I wouldn't use it on my equipment.

    My RG62A/u had neither.

    Ever cable installer I know always used the exterior wire as a ground....just sayin never knew the wire was for hanging...or is it:smile:
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  • strider
    strider Posts: 2,568
    edited November 2013
    Kenneth Swauger wrote: »
    Accordiing to the military spec it is a single solid conductor that is silver covered copper with a dielectric of solid polyethylene and a tinned copper braid shield. The characteristic impedance is 53.5 Ohms and the capacitance is 28.5pF/foot. Definately worth a try.

    Thanks, Ken.

    So no good for digital coax but IC and input/output wiring I'd be ok?
    Wristwatch--->Crisco
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  • pitdogg2
    pitdogg2 Posts: 25,563
    edited November 2013
    strider wrote: »
    Thanks, Ken.

    So no good for digital coax but IC and input/output wiring I'd be ok?

    yes ^^^^^^ you need true 75ohm for digital...
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  • monepolk
    monepolk Posts: 1,143
    edited November 2013
    pitdogg2 wrote: »
    My RG62A/u had neither.

    Ever cable installer I know always used the exterior wire as a ground....just sayin never knew the wire was for hanging...or is it:smile:

    Not unless they've changed things since I was in the field. What are they grounding it to a tap on the pole instead of a ground rod??
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  • monepolk
    monepolk Posts: 1,143
    edited November 2013
    It has been 9 years since I've worked in the field, but hard to believe that copper is so cheap now that they would add it to the full length of a drop to use as a ground wire.
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  • pitdogg2
    pitdogg2 Posts: 25,563
    edited November 2013
    monepolk wrote: »
    Not unless they've changed things since I was in the field. What are they grounding it to a tap on the pole instead of a ground rod??

    ground to splitter and ground rod from box..I do not know what they did at the pole since they didn't let me up there...:mrgreen:

    what you say does make some sense, because you also use the coax shield as ground also...I tossed all those monkey's to the curb went to Dish ran my own cable and have not had any trouble since.
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  • disneyjoe7
    disneyjoe7 Posts: 11,435
    edited November 2013
    Kenneth Swauger wrote: »
    Accordiing to the military spec it is a single solid conductor that is silver covered copper with a dielectric of solid polyethylene and a tinned copper braid shield. The characteristic impedance is 53.5 Ohms and the capacitance is 28.5pF/foot. Definately worth a try.

    I used some wire liked that copper with a silver cover and Loved IT. As everything Bass and Tweet...

    Speakers
    Carver Amazing Fronts
    CS400i Center
    RT800i's Rears
    Sub Paradigm Servo 15

    Electronics
    Conrad Johnson PV-5 pre-amp
    Parasound Halo A23
    Pioneer 84TXSi AVR
    Pioneer 79Avi DVD
    Sony CX400 CD changer
    Panasonic 42-PX60U Plasma
    WMC Win7 32bit HD DVR


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  • pitdogg2
    pitdogg2 Posts: 25,563
    edited November 2013
    monepolk wrote: »
    It has been 9 years since I've worked in the field, but hard to believe that copper is so cheap now that they would add it to the full length of a drop to use as a ground wire.

    its not because why else would most all cable manufacture's now use CCS (copper coated steel) It has been awhile since I've seen the exterior copper wire. You would of thought that a exterior steel cable would of worked better at hanging except for the rust. That is why I ran all my own wire with true Copper center conductor. I got tired of the rust on the connector ends from inferior crimp jobs...
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  • disneyjoe7
    disneyjoe7 Posts: 11,435
    edited November 2013
    Copper with a Silver coat is Mil wire which was used on ships, so I think some of this wire are around.

    Speakers
    Carver Amazing Fronts
    CS400i Center
    RT800i's Rears
    Sub Paradigm Servo 15

    Electronics
    Conrad Johnson PV-5 pre-amp
    Parasound Halo A23
    Pioneer 84TXSi AVR
    Pioneer 79Avi DVD
    Sony CX400 CD changer
    Panasonic 42-PX60U Plasma
    WMC Win7 32bit HD DVR


    · Share on FacebookShare on Twitter
  • monepolk
    monepolk Posts: 1,143
    edited November 2013
    pitdogg2 wrote: »
    ground to splitter and ground rod from box..I do not know what they did at the pole since they didn't let me up there...:mrgreen:

    what you say does make some sense, because you also use the coax shield as ground also...I tossed all those monkey's to the curb went to Dish ran my own cable and have not had any trouble since.
    LOL
    We must be talking about different things although I have seen some strange things done in the field.
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  • monepolk
    monepolk Posts: 1,143
    edited November 2013
    I stand corrected apparently they now sell cable that also use the messenger as a ground.

    As I said it has been awhile.
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  • pitdogg2
    pitdogg2 Posts: 25,563
    edited November 2013
    shru thought i was loosing it.....^^^^^
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