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Extending Satellite Antenna Cables (1.5m): Identifying Cable Types, Required Items & DIY Guide

Dukerss 17580 17
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How do I extend my satellite TV coax cable by about 1.5 m, and what connectors do I need?

Extend only the coaxial cable that goes to the satellite dish/decoder, and do not join the two coax runs together. Buy two F-connectors and one F barrel/coupler; the decoder-side end also needs an F connector, so you may need three F connectors in total [#16638928][#16638788] Fit an F connector to each cable end and screw them into the barrel/coupler [#16638788][#16638928] If you do not know which of the two coax cables is the active one, extend one and test it; if it does not work, try the other, or trace the cable ends first [#16640763][#16640905]
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  • #1 16638767
    Dukerss
    Level 7  
    Posts: 5
    Rate: 2
    Hello, I have a satellite dish
    Three cables come out of the wall (photo attached)
    I would like to extend the cable (s) I don't even know where they are about 1.5 m where the TV will stand

    What I need and how to do it, which cable or all three

    Do I need the necessary items at castorama / leroy?

    I am green in these subjects

    Ps edit
    All in all four Oo cables go

    Two in which is full of small cables and two in which there are probably single copper cables (such protruding needles) I have no idea what it is and why it is so
    Attachments:
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  • #2 16638786
    Ture11
    Level 39  
    Posts: 5406
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    None of these wires looks coaxial, they are all rather from the ETHERNET network and probably have ends in other rooms - here (where the photo is taken) there was probably a switch or router.
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  • #4 16638790
    Ture11
    Level 39  
    Posts: 5406
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    Ew. show a better picture of those cables that have "such protruding needles".
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  • #6 16638804
    brofran
    Level 41  
    Posts: 6609
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    Ture11 wrote:
    None of these wires looks concentric
    I don't know how you look, but all three are concentric. Just as colleagues suggested, it is best to connect it with "barrel" fittings.
  • #7 16638816
    jdubowski
    Tube devices specialist  
    Posts: 21595
    Help: 2511
    Rate: 2792
    Ture11 wrote:
    None of these wires looks concentric,


    The two upper ones are concentric, the third probably also, and I wouldn't bet here.
  • #8 16638894
    Dukerss
    Level 7  
    Posts: 5
    Rate: 2
    Two pieces, one cannot be seen because it looks the same as the one in the picture.

    So from what I understand these two with these "pins" connect the barrel or something in one cable anyway?
    As I say in the store, it will definitely direct me, but I don't want to be green in it either, so I would like to ask for some explanation what to buy in order not to ride and exchange

    A colleague who seems to know, I don't know, said that two are from the antenna and the next two in which there are 10 pieces of tiny colored cables are the Internet but here the Internet is not on the cable and So bets from a landline phone cables.

    So two are from the antenna - why two of my question? And how do you combine these two in one?
    A friend said that I supposedly hook one up and try if the other one doesn't work - is this a good way? Do you need to immediately connect two cables with one connector from which one will go to the TV? I really don't know, and the antenna for the bank is built into the roof. Thank you very much for your help

    Ps, I would also like to write what cable to buy because from the place where the cables run out I need 1.5 meter TV, and so I have to connect it (I think one) and connect the 1.5 meter cable that will enter the TV
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  • #9 16638916
    Dukerss
    Level 7  
    Posts: 5
    Rate: 2
    Buy a barrel like in the picture?
    Attachments:
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    #10 16638928
    jdubowski
    Tube devices specialist  
    Posts: 21595
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    Dukerss wrote:
    Buy a barrel like in the picture?


    It's not a barrel - it's a tee. We do not use such in antenna installations.


    Dukerss wrote:
    What I need and how to do it, which cable or all three


    You must extend the cable that leads to the satellite dish.

    You need a "barrel" and two F-connectors (basically three because the end of the cable from the decoder side also requires a connector.

    Barrel:
    Extending Satellite Antenna Cables (1.5m): Identifying Cable Types, Required Items & DIY Guide
  • Helpful post
    #11 16639351
    LeDy
    Level 43  
    Posts: 19004
    Help: 1981
    Rate: 2899
    This is how it is to be done
    Extending Satellite Antenna Cables (1.5m): Identifying Cable Types, Required Items & DIY Guide Extending Satellite Antenna Cables (1.5m): Identifying Cable Types, Required Items & DIY Guide Extending Satellite Antenna Cables (1.5m): Identifying Cable Types, Required Items & DIY Guide Extending Satellite Antenna Cables (1.5m): Identifying Cable Types, Required Items & DIY Guide
  • #12 16640147
    Radiokiller
    Level 30  
    Posts: 1299
    Help: 156
    Rate: 235
    Hello
    Is this a new building with no sockets on the walls?
  • #13 16640744
    Dukerss
    Level 7  
    Posts: 5
    Rate: 2
    It is a new building in theory, it is the second house that serves as a garage downstairs and the mountain was made 10 years back. Now I've moved in from a second home, cables sticking out of the wall. Dad said the antenna was built into the roof, and these two other cables are from the landline.

    Now I have a question. Well, I have these two coaxial cables (TV from the antenna) that come out of the wall with these pins. To extend it, which cable should I extend? Because only one goes to the decoder, not two. Here is my question, should I buy a connector and connect these two into one, then extend or get in and which way to extend as you advise? In the photo you can also see two such cables with pins from here, my question is to be extended so that there is a signal from the antenna?

    How to combine what to do to extend I know. Only as above I do not know which of these two cables to extend? So that everything flashes.

    Once again, thank you very much for your help
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  • #14 16640763
    goldi74
    Level 43  
    Posts: 8058
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    Dukerss wrote:
    Only as above I do not know which of these two cables to extend?

    I think that no one here knows in the forum either. Extend one of them and see if it works. If not, extend the second one and check again. Certainly do not connect these cables with each other because it is not known what will result.
  • #15 16640778
    rafcio_21
    Level 29  
    Posts: 1110
    Help: 137
    Rate: 292
    Also check what kind of antenna it is. What is your dvbt or satellite decoder? It would be best to measure the passage from the antenna and you will know which to connect.
  • #16 16640905
    Radiokiller
    Level 30  
    Posts: 1299
    Help: 156
    Rate: 235
    Find the other ends of these wires and "call" them, the matter will be clarified.
    Secondly, I suggest you install the socket and then extend it. You have to live there.
    Unless there is still no plaster.
  • #17 16641242
    jdubowski
    Tube devices specialist  
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    Dukerss wrote:
    Hello, I have a satellite dish

    Dukerss wrote:
    Dad said there was an antenna built into the roof


    Dad also told me fairy tales when I was little ;)
    Look into the attic, because if the analog TV or DVB-T antenna "built into the roof" (read located in the attic, after the roof covered with non-conductive material) I believe, it is not satellite.
  • #18 16641520
    Dukerss
    Level 7  
    Posts: 5
    Rate: 2
    Everything is going on, finally my father's friend arrived. Thank you for your help and trouble.

    From what he said he did everything elegantly, and the antenna is under the satellite roof. You won't go to the attic because everything is from a tree and you would have to remove the boards - too much work as long as you had to extend this cable. He managed without problems,

    Thank you for your help
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Topic summary

✨ The discussion revolves around extending satellite antenna cables by approximately 1.5 meters. The user is uncertain about the types of cables available, which include two coaxial cables with pins and two others likely related to internet connectivity. Participants suggest using "F-connectors" and a "barrel" connector to extend the coaxial cables leading to the satellite dish. It is advised to test each cable individually to determine which one provides a signal to the decoder. The user is also encouraged to clarify the cable functions by checking their other ends and considering the installation of a socket for better connectivity.
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FAQ

TL;DR: To extend a satellite run by 1.5 m, you need 3 pieces (two F-connectors + one “barrel”)—and “We do not use tees in antenna installations.” [Elektroda, jdubowski, post #16638928]

Why it matters:** This quick DIY prevents signal loss and avoids mistakes like joining two coax feeds.

For: homeowners/renters moving a TV ~1–2 m, unsure which wall cables are satellite and what parts to buy.

Quick Facts

How do I extend a satellite coax by about 1.5 meters?

Crimp or screw an F-connector onto the existing coax and another onto your 1.5 m lead. Join them using a female–female F “barrel.” Add a third F-connector at the decoder end if needed. That’s three pieces total. [Elektroda, jdubowski, post #16638928]

Which of the two wall coax cables should I use?

Pick one, fit the connector, and test the decoder. If it fails, try the other. Do not join the two together; results are unpredictable. “Extend one of them and see if it works.” [Elektroda, goldi74, post #16640763]

Can I use a tee/splitter to merge two coax cables into one TV input?

No. Tees are not used in antenna installations and can kill signal quality. As one expert put it, “We do not use tees in antenna installations.” Use only a straight F–F barrel to extend a single run. [Elektroda, jdubowski, post #16638928]

What connectors and couplers should I ask for in the store?

Ask for two F-connectors (often called “F-type ends,” “efka”) and one F–F barrel coupler. Most home-improvement or electronics stores carry these in the satellite TV section. [Elektroda, rafcio_21, post #16638788]

How do I correctly fit an F-connector? (3-step quick guide)

  1. Strip the coax to expose the center conductor and fold braid back.
  2. Slide on the F-connector until the dielectric is flush.
  3. Tighten or compress and then screw onto the barrel firmly. Use the same method on both ends. [Elektroda, LeDy, post #16639351]

Are the other wall cables for Ethernet or phone lines?

Yes. The bundles with many tiny, colored wires are low‑voltage network or telephone leads, not satellite coax. Do not attach F-connectors to them. They terminate at switches, routers, or phone blocks in other rooms. [Elektroda, Ture11, post #16638786]

Is a satellite dish ever installed “under the roof” (in the attic)?

No. That phrase often confuses terrestrial TV with satellite. A dish needs clear sky, not an attic. If someone claims the dish is inside, recheck—attic antennas are for analog/DVB‑T, not satellite. [Elektroda, jdubowski, post #16641242]

Should I install a wall socket before extending?

It’s a good idea. Locate the other ends, label or 'call' them out, and fit a proper wall socket. Then run your short patch to the TV. This keeps things tidy and serviceable. [Elektroda, Radiokiller, post #16640905]

How do I identify the correct cable end in another room?

Find the other terminations and 'call' or tone them to confirm continuity. Once identified, label the run and proceed with the extension using the barrel method. [Elektroda, Radiokiller, post #16640905]

Do I need to know if my receiver is DVB‑T or satellite before extending?

Yes. Verify whether your device is a DVB‑T terrestrial receiver or a satellite decoder. Extend only the matching coax line from the proper antenna or dish, then test. [Elektroda, rafcio_21, post #16640778]

What if both coax cables are from the dish (twin feed)?

Treat them as separate feeds. Use only one for a single‑tuner decoder. Do not combine them. If one doesn’t work, test the other as a separate run. [Elektroda, goldi74, post #16640763]

Will a 1.5 m extension hurt signal quality?

A short 1.5 m patch is fine when joined with F-connectors and a barrel. Keep connections snug and avoid tees to prevent losses. The original thread involved exactly a 1.5 m need. [Elektroda, Dukerss, post #16638894]

Any proof this approach works in practice?

Yes. The original poster confirmed success after a knowledgeable friend extended the cable cleanly using the described approach. [Elektroda, Dukerss, post #16641520]

What’s the failure mode if I join the two coax cables together?

Joining two separate feeds can cause shorting between LNB control voltages and 22 kHz tones, resulting in no reception. Avoid combining; test one line at a time. [Elektroda, goldi74, post #16640763]
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