Anybody know about TV aerial connections?

Discussion in 'OT (OFF Topic) Forums' started by BTB 500, Dec 5, 2011.

  1. BTB 500

    BTB 500 MB Club Veteran

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    We've got a rarely-used TV aerial point upstairs that doesn't work very well.

    The socket for the flylead was pretty loose so I fitted a new faceplate to see if that would help (only a couple of quid from Wickes). It didn't, but here's the weird thing. With the TV connected to the socket and the faceplate hanging loose I noticed that if I touched a screwdriver to the terminal that the centre wire of the co-ax cable goes to ... the signal improved hugely!

    Does that sound like the cable has a problem somewhere?

    It's not the end of the world as we only have an old (analog) TV/DVD unit up there for the kids to watch films on. But analog reception is OK on the aerial point downstairs, so I was just curious!
     
  2. Red C220

    Red C220 MB Enthusiast

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    My first assumption would be whatever it was connected to was pointing in the wrong direction/no longer there/has a severed cable.

    By touching the cable you've become the aerial and boosted the signal.
     
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  3. renault12ts

    renault12ts MB Club Veteran

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    It does...you were a better aerial than the real one.
     
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  4. OP
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    BTB 500

    BTB 500 MB Club Veteran

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    Thanks guys, will see if I can trace the cable. We've only got a single aerial, which is fine. There's a box in the loft that I assume splits the signal out to the various sockets around the house - will start there!

    It was only the shaft of the screwdriver touching the terminal btw. So about 3" of metal ... wouldn't have thought that would be big enough to act as an antenna??
     
  5. Merc Owner 2B

    Merc Owner 2B MB Enthusiast

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    It's not just the screwdriver. You became the aerial by holding the screwdriver. No direct electrical connection is necessary for rf signals.

    Sounds like that cable may not be connected to an aerial at the other end.
     
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  6. renault12ts

    renault12ts MB Club Veteran

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    ^ Agreed. Try holding your car remote key to your chin...it more than doubles the range at which you can open the doors.
     
  7. corned

    corned MB Enthusiast

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    ^ Indeed, but it's still not as good as wearing a metal colander studded with 6-inch nails on your head.
     
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  8. Merc Owner 2B

    Merc Owner 2B MB Enthusiast

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    If I see someone struggling with a remote I suggest this and, although I know it's true, can rarely get anyone to do it!
     
  9. Merc Owner 2B

    Merc Owner 2B MB Enthusiast

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    Sounds like a scene from "Signs". :D
     
  10. OP
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    BTB 500

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    Yup I knew about the trick with the keyfob, but didn't make the connection!
     
  11. brucemillar

    brucemillar MB Enthusiast

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    That is about the worst pun I have heard this year. Please tell me you meant it like that.
     
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  12. corned

    corned MB Enthusiast

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    +1 lol!
     
  13. grober

    grober MB Master

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    Analogue reception? You will be changing to Digital in Feb 2012?? So depending on the age of your YAGI array might be an idea to change to a wide band aerial while you are at it.:dk:
     
  14. OP
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    BTB 500

    BTB 500 MB Club Veteran

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    We've got a high gain antenna and receive Freeview HD etc. happily on our main TV downstairs - as mentioned, this is an old TV/DVD unit that the kids use. The digital switchover in our area is in April.
     
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  15. artyman

    artyman MB Enthusiast

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    That darned reminder that keeps popping up on my TV is starting to annoy me.
     
  16. OP
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    BTB 500

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    Well I had a little look ... and it seems the cable from that TV point runs down to a junction box at ground level rather than up to the loft. I think the previous occupant used a cable service, so I assume it was a feed for that. I'll have to investigate a bit more!
     
  17. corned

    corned MB Enthusiast

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    Might be easier, not to mention cheaper, just to stand there with the screwdriver in the coax socket... :D
     
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  18. johnsco

    johnsco MB Enthusiast

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    Just place a new broadband aerial in the loft pointing at the transmitter.
    Run a new cable to the old aerial socket or to a "flying connector" to plug into your set.
    Should do the trick.
     
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  19. Merc Owner 2B

    Merc Owner 2B MB Enthusiast

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    Agree. Preferably run a single cable from the aerial and straight into the back of the tv, without the faceplate etc. This will give you the best reception.
     
  20. alan350CDI

    alan350CDI New Member

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    You can get some pretty good faceplates, I have 2 at different ends of the living room depending on where the missus wants the TV on a monthly basis. They have gold plated terminals and I've got gold plated ends on the coax leads, we live in a terrible signal area and I still get great reception. Having faceplates means you can rearrange the room and not leave cable hanging out is all :thumb:
     

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