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Thread: WIRING FOR ASTATIC 877L DESK MIC TO YAESU 8 PIN

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  1. #1

    Default WIRING FOR ASTATIC 877L DESK MIC TO YAESU 8 PIN

    I cant find info on this on the net and Ive tried a few different combinations to wire this to my FT-990 which is a standard Yaesu 8 pin. Microphone wire colors are red, black, white, sheild, green

  2. #2
    Join Date
    Jan 2000
    Location
    Ayrshire, Scotland
    Posts
    38

    Default astatic mic wiring

    Hi KC9NGH, Try this site, there is wiring info for a bunch of mics.
    http://homepage.ntlworld.com/rg4wpw/astaticbook.pdf
    Good Luck 73 Richard GM0GRD.
    Richard

  3. #3

    Post

    The Asatic 877L microphone cable has four conductors:
    RED, BLACK, GREEN, WHITE plus an uninsulated shield wire.
    Get your radio's owner's manual for the pin assignments for the radio's microphone connector!!

    Astatic was one USA manufacturer (Shure, EV, and Turner were the others)
    that tried to stay consistent in the usage/wire color on microphone cabling.

    MIC Audio (+): WHITE
    MIC Audio (GND): SHIELD
    PTT (+): RED sometimes referred to as TX line
    PTT (-): BLACK

    GREEN wire? Likely not needed in your wiring
    RX wire, used in some applications to prevent feedback -- mute speakers

    IF the microphone is a USED purchase from eBay or a hamfest --
    DOUBLE CHECK the wiring (in case of undocumented mods)
    using the continuity function of your VOM/DVM.

    w9gb
    Last edited by W9GB; 09-19-2009 at 07:05 PM.

  4. #4

    Default

    Quote Originally Posted by KC9NGH View Post
    I cant find info on this on the net and Ive tried a few different combinations to wire this to my FT-990 which is a standard Yaesu 8 pin. Microphone wire colors are red, black, white, sheild, green
    Pin 8 is mic
    Pin 7 is ground
    Pin 6 is ptt

    Most Astatics are wired as some have already mentioned

    White is usually mic
    shield is ground
    red is usually ptt
    black is sometimes used as a receive wire, but could be the other half of the relay in the mic

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