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Can I use the Yaesu MH-59 mic with the FT-991

Discussion in 'Microphones, Speakers & Audio Processing' started by W8BYH, Sep 26, 2018.

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  1. W8BYH

    W8BYH XML Subscriber QRZ Page


    First, thanks in advance for your assistance. I just picked up a Yaesu FT-991A and happen to have a spare Yaesu MH-59 mic left over from my Yaesu FT-857 days.

    I can't find any documentation detailing just which radios the MH-59 mic can, and can't, be used with. So I figured I'd ask the assembled experts.

    Does anyone know if the MH-59 can be used with the FT-991A?

  2. HB9PJT

    HB9PJT Ham Member QRZ Page

    On my FT-891, the MH-59 worked as a microphone, but the buttons didn't. I assume the situation is identical to the FT-991.

    73, Peter - HB9PJT
  3. N2PQW

    N2PQW Ham Member QRZ Page

    Great Question! I was curious myself, but I never made time to check it out, until just now.

    I've just connected my MH-59A8J to my FT-991A, and here's what I've found.

    The MICROPHONE and PTT work just fine, but the only keypad function I am able to engage is the "FAST" tuning, by pressing the orange FAST button. This works as expected, turning on the FAST indicator on the radio.

    I can't say there is a difference in TX audio, but the web has many comments about the MH-59 having better quality sound than the stock, MH-31A8J mic. This may be the best reason for substitution, and perhaps from a function standpoint, the only one.

    Enjoy the '991A! I know I do.

  4. KE0EYJ

    KE0EYJ Ham Member QRZ Page

    Just a note... I'm often asked what mic I'm using, because my DX audio sounds so good out of my FT-891.

    My mic is the original stock MH-31 that came with the radio.

    I EQ'd it with these settings, which were determined by listening to websdr, then making a few minor tweaks as I listened through another radio.
    N2PQW likes this.

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