Yaesu FT-857D MARS mod ?

Discussion in 'Mobile Radio Systems' started by KJ6DXW, May 27, 2011.

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  1. KJ6DXW

    KJ6DXW Ham Member QRZ Page

    Please don't flame me about mods. I have a specific reason for this request:

    I'm in need of a mod that will allow TX on 118-135. I used to have it on my Icom 706mkIIg, but my new FT-857D gives me a Transmit Error in this band. MARS mod done already, but this band is still locked. Any ideas?
  2. KD4MOJ

    KD4MOJ XML Subscriber QRZ Page

    Thats the air-band (but I guess you know that already) ... i don't know of any rig that allows AM TX via the mods.

  3. W0LPQ

    W0LPQ Ham Member QRZ Page

    Even if it did work on AM, it ain't legal anyway. But, bet he knows that.
  4. N0BOX

    N0BOX Ham Member QRZ Page

    I'm pretty sure that even if you were to modify the radio to transmit on those frequencies, that the computer chip that controls the radio would also have to be reprogrammed. There is a special section of the firmware that disallows TX in the air band because Yaesu rightly believes that there is no reason for the radio to be able to transmit in that band. They don't want to be responsible for someone being able to mess with pilots talking to the control tower (whether by jamming or by impersonating the tower to give false information).
  5. KJ6DXW

    KJ6DXW Ham Member QRZ Page

    Well, as an airport manager, I don't want to have two radios in my truck. I thought I could do this with the FT-857D, but I guess I'll have to get another Icom 706mkIIg, which does transmit on the air band.
  6. K0BG

    K0BG Ham Member QRZ Page

    If you are indeed an airport manager, you would have never asked this question. Why? You already know the fines for doing so, do you not?
  7. KJ6DXW

    KJ6DXW Ham Member QRZ Page

    I love how you think they know everything. If you did, you'd know that I hold the FCC license to operate on our unicom frequency, which, yes, is in the air band.

  8. K7JEM

    K7JEM Ham Member QRZ Page

    I think the point is that the radio itself has to be certificated for part 87 to be legal to use in the aircraft band. The Icom radio doesn't have that certification. AFAIK, there is no ham radio that does.

  9. KD7MSC

    KD7MSC Ham Member QRZ Page

    Well, why don't you call the FCC and see what they have to say?

  10. KF6ABU

    KF6ABU Ham Member QRZ Page

    Since when is a ft-857 approved for UNICOM TX?
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