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
Dismiss Notice
This forum does not allow a single user to have more than one username. If anyone wants to change their username contact an admin and it will be done. Multiple accounts belonging to the same member will be deleted without warning.

Yaesu VX-8r mod - first on the internet!

Discussion in 'Yaesu' started by Moleculo, Jan 4, 2009.

  1. albertr

    albertr Member

    Joined:
    Apr 1, 2011
    Messages:
    9
    Likes Received:
    0
    My VX-8DR reset itself and now it's back to original locked state!



    I'm wondering if somehow newly installed bluetooth module is touching soldering pads and shorting them out? Too bad that I already installed a seal pad, now will have to remove it again...

    -albertr
     

  2. albertr

    albertr Member

    Joined:
    Apr 1, 2011
    Messages:
    9
    Likes Received:
    0
    Connected it to PC, and, yes, it became A2 again... Will have to pull out the seal pad to check on contacts inside. Now I know why Yaesu included two of them in the box ;)

    -albertr
     
  3. albertr

    albertr Member

    Joined:
    Apr 1, 2011
    Messages:
    9
    Likes Received:
    0
    Ok, removed the seal pad and was tied to cleaned up contacts around soldering pads of former resistor. After a few tries it came back to A3. Interesting that contacts were not shot (as measured with my multimeter). Hmm... maybe a bad contact somewhere? I guess I'll try to use it for a few days before installing my last seal pad.

    -albertr
     
  4. albertr

    albertr Member

    Joined:
    Apr 1, 2011
    Messages:
    9
    Likes Received:
    0
    Ok, just wanted to post an update... so far, everything looks good. Probably there was a bad contact somewhere.

    -albertr
     
  5. SkipA

    SkipA Member

    Joined:
    Jul 6, 2011
    Messages:
    2
    Likes Received:
    0
    Sounds like this only affects TX. Anyone know how to change the RX range to include the whole 900 MHz ham band? Normally it stops at 915 and most of the repeaters are around 927.

    Skip
     
  6. Moleculo

    Moleculo Administrator
    Staff Member

    Joined:
    Apr 14, 2002
    Messages:
    8,924
    Likes Received:
    1,131
    It's blocked between 915 and 944 Mhz and then picks up RX from 944 to 999 Mhz. I believe the blocked range is the old 900 Mhz cordless phone range, which is why it would be blocked.
     
  7. FinestBH

    FinestBH Member

    Joined:
    Jul 11, 2011
    Messages:
    9
    Likes Received:
    0
    I just finished the mod, and wanted to post a pic... The first thing that struck me when I opened the back of the radio was how SMALL the resistor is. The other pictures posted are great photos, but didn't really convey the size very well. This pic is of the resistor (after removal) at the tip of an average ball point pen (it does "pop right out" with tweezers). The small scale is further enhanced by the lines on the legal paper the pen & resistor are on. My point? If your getting up there in age, and your sight isn't what it used to be, you might need some type of magnifier PRIOR to opening the radio... Other than that, great mod and thanks to the original poster Moleculo for the great info!
    [​IMG]
     
  8. Happy_Hamer

    Happy_Hamer Administrator
    Staff Member

    Joined:
    Mar 22, 2001
    Messages:
    5,061
    Likes Received:
    184
    NICE PICTURE!!! THANK YOU FOR POSTING IT!!!

     
    1 person likes this.
  9. vasfred

    vasfred Member

    Joined:
    Nov 22, 2011
    Messages:
    3
    Likes Received:
    0
    When I did the software mod what appears on screen is me
    B1 What have I done wrong?
    Or does it mean to B1?
     
  10. vasfred

    vasfred Member

    Joined:
    Nov 22, 2011
    Messages:
    3
    Likes Received:
    0
    1. push HM/RV + MENU power on
    2. turn DIAL to choose MODE *** "B1"
    3. push Function/w
     
  11. AIRogue

    AIRogue Member

    Joined:
    Apr 3, 2012
    Messages:
    4
    Likes Received:
    0
    VX-8DR Aviation band modification: any ides?

    Hello all,

    I have recently purchased a VX-8DR to take with me on my travels overseas. I will be doing the modification to allow Tx on restricted bands as I never know what channel I may need to reach others on in case of emergency in the bush.

    My current major interest however is in Tx capabilities on Aviation band. I am a pilot and when I am flying I want to use my VX-8DR as an emergency back up to my cockpit radios. Or if I do go down and I have aircraft looking for me, I can use it to contact help (ie. 121.5).

    Does anyone know of a method, system, or way to modify the VX-8DR to allow transmission on 118-137Mhz? It's not illegal to Transmit on that band so long as you have a pilots license.

    Thanks for any help or suggestions
     
  12. Moleculo

    Moleculo Administrator
    Staff Member

    Joined:
    Apr 14, 2002
    Messages:
    8,924
    Likes Received:
    1,131
    There is no mod to allow the radio to transmit on the frequencies you want.
     
  13. AIRogue

    AIRogue Member

    Joined:
    Apr 3, 2012
    Messages:
    4
    Likes Received:
    0
    No mod currently ;-)

    I am actually writing to Yaesu now. I am sure my request will fall on deaf ears but it's worth a shot. I figure Tx'ing must be in the realm of possabilities if your can Rx those freqs. This is the point I wish I went to school for electrical engineering haha.

    Thanks for your quick response and if I ever find anything I'll be sure to share and hope you all do the same.
     
  14. AIRogue

    AIRogue Member

    Joined:
    Apr 3, 2012
    Messages:
    4
    Likes Received:
    0
    My email to Yaesu. Lets see if they reply.

     
  15. Mudfoot

    Mudfoot Elmer

    Joined:
    Jun 17, 2009
    Messages:
    10,870
    Likes Received:
    6,160
    Your letter will likely be tossed on the file basket labeled: Wankers
     

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!