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R-Columbia Headset Wiring

Discussion in 'Sound, Music, and Intercom' started by EDC, May 3, 2009.

  1. EDC

    EDC Member

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    I'm rather new to headsets and such -- but we have a R-Columbia intercom headset (we use it on a Clear-Com wired system) whose connector has come off. The wires are red, white, black, and bare; and the terminals are marked 1 through 4. (I don't know the terminology for the connector type, but it's about a 5/8-in. cylindrical form with four pin-sockets.) Does anyone know which wires go to which terminals? (I've tried to go to rcolumbia.com and tried their phone number -- out of service, both. Have they gone out of business?)
     
  2. cprted

    cprted Active Member

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  3. derekleffew

    derekleffew Resident Curmudgeon Senior Team Premium Member

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    [user]EDC[/user] the connector type is a 4pin XLR. Switchcraft #A4F for the cord mounted headset connector.
    [​IMG]
    Switchcraft Corporation Switchcraft XLR Connectors - 4-Pin Cable Ends XLR Connectors at Markertek.com

    Cannon and Neutrik make compatible connectors.

    I think R-Columbia may have been purchased and disbanded by Telex a while back.
     
  4. EDC

    EDC Member

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    Thanks, cprted and derekleffew. The connector is indeed an XLR; and I contacted Telex tech support. Seems they don't know anything about R-Columbia, but they felt sure the pinout should be 1-Bare, 2-White, 3-Black, and 4-Red. I tried it and it worked perfectly!
     
  5. cprted

    cprted Active Member

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    Good good. Always nice to get gear off the workbench and back into service!
     
  6. Chris15

    Chris15 CBMod CB Mods Premium Member

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    As a general principle, shield will always be on the mic - so pin 1.
    You then go looking for the lowish impedance pair of the 3 remaining wires that will be the earphones.

    Some headsets are up to 1500 ohms impedance an ear, hence the use of lowish...
     
  7. EDC

    EDC Member

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    Good tip, Chris15. Thanks!
     
  8. EWCguy

    EWCguy Member

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    A year later with related information. Attached is from a fax I got from Clear-Com on one of their headsets (CC-75B). It shows their wiring plan. My handwritten note regarding the RS-100A beltpakcs.
     

    Attached Files:

  9. EDC

    EDC Member

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    Thanks, EWCguy. What a timely post! I'm planning to replace another disconnected connector next week, and had totally forgotten this thread. I'll use that diagram as a backup in case the headset I'll be repairing has different-colored wires from the one I did last year.
     

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