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Maximum Length Coaxial Cable

  • 10-04-2011 9:36am
    #1
    shortys94
    Registered Users, Registered Users 2 Posts: 2,401 ✭✭✭


    Hey,

    My dad wants to run a standard television cable, from our satellite and aerial to another building on our property but what is the maximum length you can run a cable before it loses noticable signal?

    Thanks


Comments

  • #2
    mike65
    Closed Accounts Posts: 88,972 ✭✭✭✭mike65


    Depends on the quality of the cable - the longer the cable the better the sheilding.

    I have a 25 meter length of RG6 Digital Coaxial Cable for my sat and its fine
    http://www.satellite.ie/acatalog/RG6_Digital_coaxial_cable_CT_100_.html


  • #3
    Liameter
    Banned (with Prison Access) Posts: 898 ✭✭✭Liameter


    You can't use "standard television cable" for an LNB connection. You must use double-screened "satellite" cable. Frankly, I wouldn't recommend "standard television cable" for anything nowadays. It's really not very well screened and losses are unacceptably high.

    Maximum length depends on cable specification AND on the input signal level AND on the tuner signal threshold, so it's not possible to calculate unless you know those values.

    RG6 is not recommended for outdoor use because the copper braid on aluminium foil corrodes rapidly in the presence of moisture.


  • #4
    John mac
    Registered Users, Registered Users 2 Posts: 5,140 ✭✭✭John mac


    30M seems to be fine.
    although i have 40M running from my sky box to my pc , runs outside along the wall ,

    http://www.boards.ie/vbulletin/showpost.php?p=55593480&postcount=5

    and more here


  • #5
    shortys94
    Registered Users, Registered Users 2 Posts: 2,401 ✭✭✭shortys94


    I'll be needing about 65 metres is this possible to do?


  • #6
    Liameter
    Banned (with Prison Access) Posts: 898 ✭✭✭Liameter


    Yes, you can buy a 100m reel. 65m will lose about 15dB of signal in decent cable. Whether that will leave enough signal for your receiver is debatable. I would anticipate problems in bad weather unless you use a larger-than-normal dish. Maximum length depends on cable specification AND on the input signal level AND on the tuner signal threshold, so it's not possible to calculate unless you know those values.


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  • #7
    montgolfiere
    Registered Users, Registered Users 2 Posts: 276 ✭✭montgolfiere


    i've used 50 metre + runs here in the S of France, where the signal isn't brill, without too much loss.
    the Skyman


  • #8
    Tony
    Registered Users, Registered Users 2 Posts: 11,341 ✭✭✭✭Tony


    Shorty does the other building have its own electrical fuseboard ?

    Desktop PC Boards discount code on https://www.satellite.ie/ is boards.ie



  • #9
    shortys94
    Registered Users, Registered Users 2 Posts: 2,401 ✭✭✭shortys94


    Tony wrote: »
    Shorty does the other building have its own electrical fuseboard ?

    Nopeee


  • #10
    Tony
    Registered Users, Registered Users 2 Posts: 11,341 ✭✭✭✭Tony


    shortys94 wrote: »
    Nopeee

    No problems on that score then :)

    Desktop PC Boards discount code on https://www.satellite.ie/ is boards.ie



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