Narco MK-12D function question

Discussion in 'Technical Corner' started by GW172, Jan 14, 2017.

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  1. GW172

    GW172 Filing Flight Plan

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    Wondering if someone can enlighten me as to the function of the slide switch on the aft of the Narco MK-12D. I've looked on-line in several Narco MK-12D manuals but haven't seen any reference to it. I had to pull my radios recently and upon reinstalling, I had xmit issues with one of them. When I pulled it to troubleshoot, noticed that this slide switch wasn't fully engaged in one of the 3 positions and so matched it to the 2nd radio (MS-1) position and xmit issue was fixed but wondering what the switch actually does..... This is my first post, so I have tried to attach a photo (not sure if it will be visible in the thread or not, but the switch has 3 possible positions (MS-1 T, (a blank position in the middle), Other). Thanks.
     

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  2. hotprops

    hotprops Line Up and Wait PoA Supporter

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    edit .did not see the photo before i posted that is a old arc replacement do not know. call a radio shop they will know
     
    Last edited: Jan 14, 2017
  3. SkyDog58

    SkyDog58 En-Route

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    Not sure if this gives you the detail you want but it might offer some guidance.

    upload_2017-1-14_11-28-36.png
     
  4. GW172

    GW172 Filing Flight Plan

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    Thanks SkyDog58! Totally answers the question.... So it must drive the pin-outs and their interaction with the rack and in AC wiring to the correct configuration. Appreciate the assistance!
     
  5. SkyDog58

    SkyDog58 En-Route

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    Glad to help.