UTP Video Balun Pair for Cat5

Discussion in 'Bob & Don's Electronics Forum' started by DonL, Nov 7, 2011.

  1. DonL

    DonL Jack of all trades Master of one

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  2. BobL43

    BobL43 DIY Senior Member

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    Nice; I've been using shielded video cables with BNC connectors directly from DVR to cameras so far
  3. DonL

    DonL Jack of all trades Master of one

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    Coax is nice, At least you don't have cross-talk to deal with.

    The only problem with using wire, Is lightning protection.

    Sometimes Wireless pays off just because of the Electrical Isolation that you get.

    Fiber also works great, You can't get much more Isolated than that. No ground loops to deal with either.

    Fiber should get cheaper, I look for more Fiber Optic stuff to be available at a reasonable price.

    Right now the twisted pair using Cat cable seems to be the choice for Video Security Systems.
  4. ballvalve

    ballvalve General Engineering Contractor

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    Looks great, but why the power hookup? Do I need that power just for sending color video? And if yes, what transformer would work with that?
  5. DonL

    DonL Jack of all trades Master of one

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    You only need the power if your camera is located away from a usable power source.

    Or you could use it for Battery Backup Power.
  6. ballvalve

    ballvalve General Engineering Contractor

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  7. DonL

    DonL Jack of all trades Master of one

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  8. ballvalve

    ballvalve General Engineering Contractor

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    The connections are what I call 'rca' the old vcr type yellow, red [round] - and I have male-female adapters. is that what these are made for?

    Not much of of cable guy as you see.
  9. BobL43

    BobL43 DIY Senior Member

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    yes, the picture on the right with that middle plug is the RCA type used on VCRs and also on TV's
  10. DonL

    DonL Jack of all trades Master of one

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    The audio is RCA connectors and the Video is BNC.

    You may need BNC to RCA adapters if your video camera is RCA.
  11. ballvalve

    ballvalve General Engineering Contractor

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    Last edited: Nov 13, 2011
  12. BobL43

    BobL43 DIY Senior Member

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    I knew the CAT 6 was for higher sppeds like for my Gigabit router and LAN cards, but honestly, I did not know the difference in construction, so here is the answer: it has a longitudinal seperator as described here:
    http://cableorganizer.com/articles/cat5-cat5e-cat6.htm
  13. DonL

    DonL Jack of all trades Master of one

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    You will need one of each of those connectors.

    The BNC is a 75 ohm connection.
    Make sure your that your camera is 75 ohm or close.

    Normally Cat6 uses a slightly larger copper conductor.

    I would use Cat5e or Cat6, whatever you can get the best deal on, With connectors installed, unless you have a RJ45 Crimp tool.
  14. ballvalve

    ballvalve General Engineering Contractor

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    Thanks - The camera is a 6 year old pinhole type so I have no idea of its ohm rating.

    Anyone hear of a balun with rca leads? Do the new cameras only use the BNC?
  15. DonL

    DonL Jack of all trades Master of one

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    Yes they do make them

    http://www.mcmelectronics.com/product/50-7730

    But they are much more money.

    The Video is BNC or RCA and the Audio is RCA on the new ones. They come in both flavors.
  16. ballvalve

    ballvalve General Engineering Contractor

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  17. DonL

    DonL Jack of all trades Master of one

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    I think the first set was cheaper. You have to buy 2 of them, The other was a pair.

    Video is nothing more than an AC Signal with Various Frequencies,
    So You only need 2 wires (1 twisted pair). Leaves you more conductors for other things.

    You can power LEDs. IR lighting works best with B&W cameras.
  18. ballvalve

    ballvalve General Engineering Contractor

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    found some rca video to cat5 for 9 bucks each on amazonia, so went that route. Thanks.
  19. ballvalve

    ballvalve General Engineering Contractor

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  20. BobL43

    BobL43 DIY Senior Member

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