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Apartment antenna port

Discussion in 'Electronic Basics' started by A man, Feb 27, 2004.

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  1. A man

    A man Guest

    I just got an apartment and they said there is a hookup to an external antenna
    on the roof. I found a port (not for cable) which I have not seen before. It is
    not for an RCA plug and is not a coax port. What kind of port is it and how do
    I hook it up to my TV?

    It is just large enough to go OVER an RCA plug but the RCA plug just falls out.
    So it can't be for RCA plus. There are 2 copper wires coming off the back of
    this port and they do not carry power. I checked for voltage.

    Apartments look like they were built late 1970's early 1980s.

    Thanks.
     
  2. In the "Olden Days" there was something called Community
    Antenna TeleVision (hence CATV, the original "cable TV") for
    apartment complexes which allowed all tenants to use one
    broadcast reception antenna. IIRC it was a 75 ohm system
    that used threaded connectors not quite the same size as RCA
    connectors. Later they used springloaded jobbies that slip-fit.

    F-type, RG-6, and RG-59 come vaguely to mind as connector
    and cable designations respectively.

    HTH

    Mark L. Fergerson
     
  3. Jamie

    Jamie Guest

    300 Ohm molded twin lead? that was very common back then,
    its obvious your knowledge of this stuff is some what
    limited and makes it very hard for many here to picture
    what exactly you have?
    its very possible you may have a Female 300 Ohm receptical
    which requires the Male end of it to a 300:75 transformer adapter.
    if this is the case you should have 2 holes aprox 3/8 " apart on a
    plate..
    etc..
     
  4. Jerry G.

    Jerry G. Guest

    You should be asking your building operator about this. I would not connect
    my TV set to anything without knowing what it is about.

    --

    Greetings,

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


    I just got an apartment and they said there is a hookup to an external
    antenna
    on the roof. I found a port (not for cable) which I have not seen before. It
    is
    not for an RCA plug and is not a coax port. What kind of port is it and how
    do
    I hook it up to my TV?

    It is just large enough to go OVER an RCA plug but the RCA plug just falls
    out.
    So it can't be for RCA plus. There are 2 copper wires coming off the back of
    this port and they do not carry power. I checked for voltage.

    Apartments look like they were built late 1970's early 1980s.

    Thanks.
     
  5. A man

    A man Guest

    The guy at Radio Shack said it sounds like a connector used for Ham radios
    these days, and the connector looked like it would fit. The connector looked
    like an RCA plug but with a long center post. Then I needed a convertor to make
    it into a coax connector.

    Does this sound right?
     
  6. Pretty much. It's kinda been a while since I saw one of
    these systems.

    You said "they" explained this was for your TV to connect
    to. Who's "they", the management? Ask them for more info
    (warn them you'll sue them if your TV is damaged if they're
    not forthcoming), or better, ask one of your neighbors how
    they hooked theirs up and do that (get a good look at the
    connectors if possible). If the building super (or
    equivalent) did it for them and soaked them thirty bucks for
    the connectors a class-action suit might be in the works.

    Mark L. Fergerson
     
  7. Bob Masta

    Bob Masta Guest

    Not sure, but it sounds like you might have a UHF connector.
    The receptacle on the wall will be a 1/2 inch diameter threaded
    cylinder with teeth around the end and an insulating insert
    with a central contact socket about 1/8 inch in diameter.

    On the plug, the inner part is about 1/2 inch in diameter
    and has two small teeth to mate in any orientation with
    the receptacle teeth. The plug has a long center
    post that is typically open. You insert the central conductor
    from the back and heat the post while feeding solder to the
    hole on the tip. The shield of the cable is stripped back
    and folded over an insert thingy that is threaded into the
    back, and an overall internal threaded sleeve mates with the
    external threads on the receptacle.

    You can probably find a ready-made UHF-to-whatever adaptor
    that will eliminate the need for messing with cable.





    Bob Masta
    dqatechATdaqartaDOTcom

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
     
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