1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice

MARS/CAP mod?

Discussion in 'Amateur Radio Modifications' started by Se7en, Aug 3, 2012.

  1. Se7en

    Se7en Well-Known Member

    Joined:
    Jun 27, 2010
    Messages:
    4,602
    Likes Received:
    207
    IS this correct for the VX-7R: Yaesu VX-7 R (VX 7 R VX7R) transceivers mods reviews software and diagrams


    Remove the battery pack.


    Remove the sticker/cover seal for the pressure sensing unit (SU-1), in the battery compartment. This is the black strip above cellular warning label and is where the SU-1 option goes.


    1 Locate row of eight jumpers. They are numbered.


    2 For Mars/Cap, remove solder jumper 5.




    3 For Freeband, remove solder jumper 4 and 5.


    4 Reset microprocessor. (Press and hold in the 4, band, and v/m keys while turning the radio on.


    5 ENJOY

    TX Frequencies:
    Freeband: 40-224.995Mhz and 300-579.995Mhz
    Mars/Cap: 50Mhz-54Mhz, 140Mhz-174Mhz, 222Mhz-225Mhz, and 420Mhz-470Mhz.


    I guess there is also a SOFTWARE hack without having to unsolder things on the board?
     

  2. shepsvettes

    shepsvettes Member

    Joined:
    Jan 19, 2011
    Messages:
    24
    Likes Received:
    4
    mod

    Yes that's correct.
     
  3. Se7en

    Se7en Well-Known Member

    Joined:
    Jun 27, 2010
    Messages:
    4,602
    Likes Received:
    207
    I think id benefit from the freeband mod vs mars/cap.

    Ty for the reply.
     
  4. Happy_Hamer

    Happy_Hamer Administrator
    Staff Member

    Joined:
    Mar 22, 2001
    Messages:
    5,045
    Likes Received:
    135
    Personally I don't see a benefit at all.

    I dont use GMRS/MURS/FRS enough to risk it, thats just me
     
  5. Se7en

    Se7en Well-Known Member

    Joined:
    Jun 27, 2010
    Messages:
    4,602
    Likes Received:
    207
    Risk burning the ht or risk getting in trouble ?
     

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!