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Thread: Broken VTx SMA Connector

  1. #1
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    Broken VTx SMA Connector

    I managed to break the SMA connector of my IMRC 5G8 600mW VTx during a crash. The SMA connector lost one of its pins but everything else looks fine. Can I just get a replacement SMA PCB connector and re-solder it to the board?

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  2. #2
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    Looks like it's torn the copper traces up with it.

    If you scratch the surface next to the sma pins and expose some copper, you should be able to effect a repair.

    Obviously be careful where you do that with the middle pin of the sma - it needs to only contact that centre trace and not either side or else you'll short it out.

  3. #3
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    Thank you for your answer Zeeflyboy!

    After the crash on the flying field, I checked the VTx before I noticed that one of the pins was missing and it worked fine. Then I drove home and noticed that the whole connector has became loose. Luckily I found the missing pin inside the frame. So as an alternate to soldering a new connector to the board, I could also try to re-solder the missing pin to the connector and then hot-glue the connector including the copper traces back to the board. Maybe that's more promising?

    I really love this VTx and it costs around 100 Euros here in Germany, so I really hope to get it repaired.

  4. #4
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    no that won't work because the traces will still be broken. Just do as described and it'll at least be usable.

  5. #5
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    All right, I already ordered a replacement connector and will give it a try. Thanks again, Zeeflyboy!

  6. #6
    ImmersionRC Support Guru swillhide's Avatar
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    ImmersionRC does offer a repair service for things like this. If the SMA came off and it was powered for a small time its a good chance that the PA also blew out, I would contact Repairs@immersionrc.com and see what Dave has to say about getting it fixed and tested.
    AMA # 1015480 HAM Callsign # Procrastinating..
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    Thanks swillhide, I send Dave a mail.

    Edit: Done. Fingers crossed.
    Last edited by raumagent; 25th May 2015 at 03:12 PM.

  8. #8
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    A repair through ImmersionRC will cost you $35 which includes return shipping. I have done this, and the repair work actually makes the joint stronger than the stock. However, the price makes you hesitate if it is really worth it though, knowing there are many other 5.8GHz vtx priced around $30-$40.

  9. #9
    ImmersionRC Support Guru swillhide's Avatar
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    There are many other 30-40 vtx's .. But once you have been around this hobby for a bit you will learn you need 2-3 of those vtx's in order to find one that works like our do.
    AMA # 1015480 HAM Callsign # Procrastinating..
    Futaba 9c w/Ezuhf /Skywalker 1880 or anything else that I can Lawn Dart.
    Retired: Disco(Sold), Skywalker 1900(Dirt Nap), Qav540g/Nazav2/Iosd mk2

  10. #10
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    I'm with swillhide here, this VTx is a fine piece of craftsmanship and worth its money compared to cheaper ones.

    However, thank you EasyFlare for the info! $35 including shipping and stronger solder joints than before doesn't sound so bad to me. At least better then spending another 100 Euros for a new one or loosing range and video quality by repairing it on my own (I don't own a power meter, yet). How long does it took to get it back from repair?

    Still waiting for an answer from Dave, let's see what he says.

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