new antenna required?

Discussion in 'Avionics and Upgrades' started by Let'sgoflying!, Dec 29, 2018.

  1. Let'sgoflying!

    Let'sgoflying! Touchdown! Greaser! PoA Supporter

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    I have a 530W and am thinking of changing the GTX 327 to 345.

    I want the ADS-B in and out, Class A airspace /international ops solution. (Is that Mode S-ES?)

    Will I need to install a new, separate antenna?
     
  2. GeorgeC

    GeorgeC En-Route PoA Supporter

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  3. Mtns2Skies

    Mtns2Skies Super Moderator Management Council Member PoA Supporter

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    If I were a cooler moderator, I'd lock the thread after @GeorgeC 's post. Ultimate mic drop.
     
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  4. Unit74

    Unit74 Final Approach

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    No... Uses the same ol transponder antenna. The 345 is an 1090 ES box, pulls the GPS data from the 430W so no.
     
  5. Let'sgoflying!

    Let'sgoflying! Touchdown! Greaser! PoA Supporter

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  6. bnt83

    bnt83 Final Approach PoA Supporter

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    That transponder is around $4500, depending on what the coax and antenna look like, I’d replace it with a blade and RG400(or better if needed), cheap insurance for flawless performance. Also note that there is DB loss issues with really long coax and these (most?) can fail transponder ramp inspections if manufacturer specs are ignored. I think the 345 says RG400 should be no lomger than 8 feet but not positive.
     
    Last edited: Dec 29, 2018
  7. Let'sgoflying!

    Let'sgoflying! Touchdown! Greaser! PoA Supporter

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    getting conflicting info, so just want to confirm there is not a separate antenna required for the ads-b function.
     
  8. Unit74

    Unit74 Final Approach

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    Listen to Jesse.....
     
    Last edited: Jan 1, 2019
  9. Jesse Saint

    Jesse Saint Pre-takeoff checklist

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    No new antenna is needed. The transponder and ads-b receiver use a single antenna. No gps antenna is needed because the WAAS navigator provides position.
     
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  10. Let'sgoflying!

    Let'sgoflying! Touchdown! Greaser! PoA Supporter

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    Haha you guys fight that one out & let me know.