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Thread: Radio static

  1. #1
    Senior Member fastfred's Avatar
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    Default Radio static

    Anyone have and input on this problem. When I key the mic it makes a loud static . Very uncomfortable. So far I have checked the settings adjusted the squelch . It started one day when talking to the tower with a Helicopter running near by . I keyed the mic and got blasted with static and helicopter blades. I tried to adjust it out and lost the tower for few minutes. The controller was not happy with me..

  2. #2
    Senior Member Esser's Avatar
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    Default Re: Radio static

    What comm? How far are your coax cables from other cables?
    ------------------
    Josh Esser
    Flying SS7
    Rotax 914iS
    AirMaster Prop

    Edmonton, AB, CWL3

  3. #3
    Senior Member Dave S's Avatar
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    Default Re: Radio static

    FastFred,

    If you have a new or different headset, or new or different radio, you might need to adjust the mic gain (first) or the sidetone on the radio itself.

    When you speak of picking up helicopter noise in the transmission - that makes me think a look at the mic gain is a good place to start - might be set a little high.

    Information on doing this is a bit skimpy in most radio manuals, however the David Clark headsets have some instructions in their headset manuals.

    If you don't have a new or different headset or radio - might need to start somewhere else.

    IMHO....Radio=Voodoo
    Dave S
    Kitfox 7 Trigear (Flying since 2009)
    912ULS Warp Drive

    St Paul, MN

  4. #4
    Senior Member fastfred's Avatar
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    Default Re: Radio static

    It is a Garmin SL 30 and Sl 40. I did just install the dynon ADS B in unit which has coax running to the Antenna. He just ran it next to the existing harness.

  5. #5
    Administrator DesertFox4's Avatar
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    Default Re: Radio static

    Check for good grounds on radio and push to talk switch also.


    DesertFox4
    Admin.
    7 Super Sport
    912 ULS Tri-gear


  6. #6
    Senior Member rv9ralph's Avatar
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    Default Re: Radio static

    If the problem manifested after the ADS-B install, I would check anything new from that work. Suggestions such as the routing of new antenna coax (RF bleed over).

    Ralph

  7. #7
    Senior Member fastfred's Avatar
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    Default Re: Radio static

    I will try that next. I wouldn't think it would be a ground problem because the radio is 8 yeas old. But it did not do it right away after the adsb in was installed?

  8. #8
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    Default Re: Radio static

    I'd almost wager a few ales that the proximity of the two coax cables is causing this problem. Route the ADSB coax as far as possible from the radio coax and I reckon you'll be fine. If that doesn't solve it then let us know where your radio antenna is relative to the newly-installed ADSB antenna.

  9. #9
    P Morel's Avatar
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    Default Re: Radio static

    Just a thought and sharing my radio gremlin experiences.

    FWIW

    Have you recently installed any new electronic add ons?
    USB plugs can sometimes be the culprit.
    LED lighting can also interfere.

    Of course check your solder connections on you plugs.
    Paul Morel
    912 Speedster

  10. #10

    Join Date
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    N Little Rock Ar
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    Default Re: Radio static

    I just finished chasing static found that the Stock EMU ( I have the 912iS) needs a good ground and it gets that from the panel my panel was not grounded

    working on that now


    David Kelm
    7SS Garmin Touch
    912iS Big Bore

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