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stage mic for Vox to Ts-480hx

Discussion in 'CB and Export Equipment and Accessories' started by Lazybones1222, Jan 19, 2009.

  1. Lazybones1222

    Lazybones1222 W9WDX Amateur Radio Club Member

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    RE: mic wiring - duh

    I would like to wire a mic with a connector like this:

    http://homepage.ntlworld.com/rg4wpw/xlr.jpg

    to a jack like this:

    http://homepage.ntlworld.com/rg4wpw/colmodk.jpg

    KENWOOD-TS480 ( 8 Pin modular Plug )

    PIN1 UP
    PIN2 +8 VOLTS
    PIN3 GND
    PIN4 PTT
    PIN5 MIC GND
    PIN6 MIC
    PIN7 N/C
    PIN8 DOWN




    The mic is a V-Tech (VT-1040) stage mic with standard 3 pin xlr.

    I want to wire it for a Kenwood 480hx for vox only use, no ptt.

    Any ideas?
     
    #1

  2. WR0220

    WR0220 Active Member

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  3. N9RZD

    N9RZD Guest

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    I tried this a while back , as i have several Shure PG58's i dont use
    and while i had it working somewhat ,
    radio checks revealed that the audio of my radio
    left something to be desired ,
    this was with a kenwood ts 130-s
    i tried using an eq, through a mixing board , and still bad results
    so finally just gave up and went back with a
    turner plus 2

    the problem is the impedance , while there are ways to
    wire an xlr for unbalanced output , it doesnt provide
    enough modulation,
    when you go for balanced output , then you have
    a very bad impedance match

    i found a couple of interesting things on google
    your mileage may vary , and if you find success
    id be interested in knowing how you did it :)

    good luck

    73
     
    #3
  4. WR0220

    WR0220 Active Member

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    If you run into an impedance issue you can overcome it by installing a DI (direct input) box inline. It will match your components and (in some cases) eliminate ground loop hum. The biggest 'problem' with using studio mics, preamps, equalizers, etc. when injecting the audio signal through the mic jack of the transceiver is that you are limited by the transceiver's audio circuit. If you drive it too hard you will cause damage. If at all possible it's best to inject the audio signal through the accessory plug which will bypass the front end of the audio circuit. It's also best to retain a balanced signal through the chain then converting it to an unbalanced signal just prior to injecting it into the transceiver. This will greatly reduce the chances of picking up hum and rf interference on the cabling.
     
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