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Video/Audio CATV Ground Loop Isolator

Discussion in 'Electronic Repair' started by Rick, Jan 20, 2004.

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  1. Rick

    Rick Guest

    Anyone have a schematic for the above? The cheapest one I can
    find at retail is $60. I'm looking to build one with the same specs as
    the VRD-1FF shown here: http://www.jensen-transformers.com/

    Thanks,
    Rick
     
  2. Jerry G.

    Jerry G. Guest

    These are fairly complex in the way of having proper bandwidth, phase, and
    noise specs. For adjusting and setting up you will need some very
    sophisticated bench equipment. A lot of the work that goes in to these types
    of units are done by hand, which adds to the cost.

    Most manufactures have their own particular design. I would think they would
    not give out any information about the design of their circuits, and the
    alignment procedures. As for the quality, the Jenson is one of the best in
    these.

    For our clients we are using Blonder Tongue http://www.blondertongue.com/ .
    This is a very high end product used in most professional installations. You
    will find them even pricier than the Jenson products.

    For the price that Jenson are asking, these are worth the money.

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    =========================================
    WebPage http://www.zoom-one.com
    Electronics http://www.zoom-one.com/electron.htm
    =========================================


    Anyone have a schematic for the above? The cheapest one I can
    find at retail is $60. I'm looking to build one with the same specs as
    the VRD-1FF shown here: http://www.jensen-transformers.com/

    Thanks,
    Rick
     
  3. JURB6006

    JURB6006 Guest

    As discussed in another thread, <u>IF</u> your problem is due to the CATV or
    antenna ground the cheapest way to fix it is to use an antenna isolator from a
    "hot chassis" TV. This would ideally come from a TV that is at least 125 ch.
    cable ready, those <u>without</u> seperate UHF terminals.

    Your situation might preclude this solution, more detail would help. I think
    there is something out there for less than $60.

    JURB
     
  4. "Rick" wrote ...
    Lots of cheap people just use a pair of balun
    transformers back-to-back. Should cost well
    under 1/10th of that price.
     
  5. Lenny

    Lenny Guest

    Ive used isolators from scrapped TV's for this purpose when the job
    involves RF. Both ground and center conductor ae both isolated. These
    may work for video as well but I've never tried that. However you can
    buy an F version of a DC block at most TV supply places. I think its
    simply a capacitor in series with the center conductor. Ground is not
    isolated. Ive used those in long video runs with much success. Lenny
    Stein, Barlen Electronics.
     
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