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MFJ - 1263 Microphone Transceiver Switch

Discussion in 'Microphones, Speakers & Audio Processing' started by WH2HAO, Oct 8, 2012.

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  1. WH2HAO

    WH2HAO QRZ Moderator Volunteer Moderator Platinum Subscriber QRZ Page


    Does anyone have experience with this switch. I can not get it to work. The instructions on where to put the sets of jumpers is very vague. It has general recommendations for the Icom radio's , but it does not work. I want to hook up an Icom 756 Pro and an Icom 7000. The Mic won't key them both. Any ideas would be very helpful.
    Thank you.
  2. WH2HAO

    WH2HAO QRZ Moderator Volunteer Moderator Platinum Subscriber QRZ Page

    Has anyone used a Mic / Radio switch or should I get rid of it ?

  3. W9GB

    W9GB Ham Member QRZ Page

    David -

    I have glanced at the MFJ Instruction Manual for this product .... it is VERY STRAIGHT FORWARD in how to setup this product.
    The jumpers set the INTERCONNECT BETWEEN 8-wires of MICROPHONE and RADIO.
    Whether the MFJ-1263 product is defective -- I have NO IDEA.

    However, based on your earlier difficulty with connecting a simple mono speaker to your Icom IC-756Pro, you appear to have some difficulty understanding the electronics/radio basics (or language).
    This MFJ-1263 product is shipped, by factory default, to work with LIKE RADIO and MICROPHONE (same mfg.). The complexity comes from playing MIX and MATCH, which requires knowledge beyond consumer/appliance usage.

    Last edited: Oct 9, 2012
  4. WH2HAO

    WH2HAO QRZ Moderator Volunteer Moderator Platinum Subscriber QRZ Page

    Thank you. You are correct, I am having difficulty. It should be simple, but it just doesn't work. So It's either my lack of knowledge, which is my primary working theory now, or the product just doesn't work well. The jumper settings are just a suggestion based on the model per the instructions, so new radio's and old radio's don't seam to have the same settings even though they are both Icom's. The directions state to refer to the radio manual for the settings. I guess that is where I get lost, where in a radio's manual will it discuss Mic jumper settings ?
  5. W9GB

    W9GB Ham Member QRZ Page

    QRZ or I can not correct your cognitive, thinking, or mental difficulties ... an Elmer in Guam is really what you need, based on your own technical assessment.
    Amateur Radio is a technical hobby, BY DEFINITION since 1920s (it has never been a non-technical, consumer service) ... That requires basic electronics knowledge AND Desire/Ability to learn more.

    Experiential tutoring (Elmers) are part of this process --- because technology continues to change and the Internet can NOT replace (and never will) that HANDS ON learning method/process.

    The instructions and the VERY FIRST Pictorial diagram (factory default jumper settings) are VERY CLEAR.

    IF the MICROPHONE PIN assignments (Pins 1 - 8) are IDENTICAL ... THEN Radio A and Radio B are SAME.
    IT DOES NOT. Jumpers are what MFJ uses, not Icom.

    2. IF your MICROPHONE is ICOM and stated to work with BOTH RADIOS, THEN you should be able to plug this microphone into into either radio, by itself, with NO Adapter cables and WORK.
    IF this is NOT TRUE, then that is your initial problem.

    Last edited: Oct 10, 2012
  6. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    I think that was uncalled for, as Greg W9GB has spent a lot of time on these forums helping others by virtue of enormous research that most could do for themselves.

    This MFJ product requires NO modifications or jumper changes of any kind when used with transceivers that are all wired the same way, as Icoms generally are. Of course, products can be flawed, and that may be the case here. We don't have any way to know for certain without being there.

    "Cockpit error" prevails and is a lot more likely today than it's ever been. I cannot envision ANY licensed amateur in 1960 asking how to hook up things. That was a day when if you didn't know, you did your own research and experimented and figured it out. I'm saddened the internet has become such a crutch.
    Last edited by a moderator: Oct 10, 2012
  7. W0LPQ

    W0LPQ Ham Member QRZ Page

    KM5YE .. you just for curiosity sake, might take a look over the last 2 weeks at how much effort Greg has put into helping people. Greg has tried on several, occassions to help this guy out, and it appeqars to fall on deaf ears. Maybe you would like to travel to Guam and help him out!!
  8. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    I'd like to. My daughter lived in Guam, working as a scuba instructor at PIR (Pacific Islands Resorts) and having visited her there, I wouldn't mind going back.
  9. WA7PRC

    WA7PRC Ham Member QRZ Page

    I wouldn't mind going back. But, I didn't live IN Guam. I lived ON Guam (Ike was President at the time).
  10. AF6LJ

    AF6LJ Premium Subscriber QRZ Page

    The problem here is a very basic one.
    The two radios have different mic connectors.
    The IC-7000 has an RJ-45 the IC-745(any version) has an eight pin circular.
    They should be jumpered differently in the box.
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