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Thread: Kenwood MC-80 with Yaesu FT857d

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  1. #1

    Default Kenwood MC-80 with Yaesu FT857d

    Hello,
    im new to this forum.
    i got unused kenwood mc80 electret condenser mic and a yaesu ft857d.
    can i use that mic with that transceiver ? i have made a converter for the pins.

  2. #2

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    ft857d mic impedance is 200 - 10 k Ohm (Supplied microphone: 2 k Ohm). mc-80 is 700ohm. do i need an audio transformer or not ?

  3. #3

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    I don't see any reason off hand why it should not work if you wired the converter right.
    I thought I could get rich in the stock market by investing in
    Viagra, Geritol, And Ginseng but my stocks didn't rise to the occasion.
    Hell, I figured that there was always somebody somewhere either trying to
    Get it up
    Get it going
    or
    Trying to remember what to do with it.
    73 De Bubba
    [COLOR=#0000CD]4 out of 5 Seniors prefer the taste of
    ALPO over other leading National Brands
    [/COLOR]

  4. #4

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    Quote Originally Posted by KD8DEY View Post
    I don't see any reason off hand why it should not work if you wired the converter right.
    how about the impedance ?

    i have tested the converter. it works 100%

  5. #5

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    Quote Originally Posted by 9M2PJU View Post
    how about the impedance ?

    i have tested the converter. it works 100%
    The Impedance falls within the listed range and should be fine. The Yaesu md-100a8x for the radio is listed as 500
    I thought I could get rich in the stock market by investing in
    Viagra, Geritol, And Ginseng but my stocks didn't rise to the occasion.
    Hell, I figured that there was always somebody somewhere either trying to
    Get it up
    Get it going
    or
    Trying to remember what to do with it.
    73 De Bubba
    [COLOR=#0000CD]4 out of 5 Seniors prefer the taste of
    ALPO over other leading National Brands
    [/COLOR]

  6. #6

    Default

    Quote Originally Posted by KD8DEY View Post
    The Impedance falls within the listed range and should be fine. The Yaesu md-100a8x for the radio is listed as 500
    from http://www.universal-radio.com/catalog/mics/0287.html the yaesu md-100 is 500 ohm unbalanced. im not sure about mc-80 mic either it's impedance are balanced or unbalanced.

  7. #7

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    Quote Originally Posted by 9M2PJU View Post
    from http://www.universal-radio.com/catalog/mics/0287.html the yaesu md-100 is 500 ohm unbalanced. im not sure about mc-80 mic either it's impedance are balanced or unbalanced.
    Unbalanced. Balance/Unbalance has to do with the way the cable works, not the mic or the impedance. It is an unbalanced shielded cable, like coax.

    I assume the power for the mic is a battery in the mic? A condenser or electret mic needs power to work. That can come from the radio or from a battery. It depends.

    The biggest potential issue is going to be RF getting into the audio. That seems to be the number one issue. Google Mc-80 and you'll find a lot of anecdotal reviews and remedies.
    Charley K1DNR

  8. #8

    Default

    Quote Originally Posted by K1DNR View Post
    Unbalanced. Balance/Unbalance has to do with the way the cable works, not the mic or the impedance. It is an unbalanced shielded cable, like coax.

    I assume the power for the mic is a battery in the mic? A condenser or electret mic needs power to work. That can come from the radio or from a battery. It depends.

    The biggest potential issue is going to be RF getting into the audio. That seems to be the number one issue. Google Mc-80 and you'll find a lot of anecdotal reviews and remedies.
    Thanks for the reply,
    my last question is do i need any audio transformer for this mic in between to the transceiver or not ? can i just rewire it's connector and plug it to the transceiver ?

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