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Garmin GA35 GPS Antenna Mounting Location

 
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maulem5210c



Joined: 07 Jan 2015
Posts: 33
Location: Spanaway Washington (S44)

PostPosted: Thu Mar 28, 2019 11:03 am    Post subject: Garmin GA35 GPS Antenna Mounting Location Reply with quote

Hoping you all are starting to have a great spring,
I'm getting ready to mount a Garmin WAAS GPS Antenna and wonder where did you install yours and does it work well there. I have the drawing from Maule which puts it on top of the wing like at station 57" or so.
Thoughts?
Alan
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1977 M5-210c (upgrading for back country fun)
Building RV-8
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andy
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Joined: 06 Aug 2007
Posts: 1036
Location: Lake James, NC, USA

PostPosted: Thu Mar 28, 2019 2:04 pm    Post subject: Reply with quote

Top of the wing. It gives you a clear view of the sky and a good ground plane.
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Andy
1986 MX7-180
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Old Piper



Joined: 10 Sep 2010
Posts: 21
Location: New York '75 M5-210C

PostPosted: Thu Mar 28, 2019 4:04 pm    Post subject: Reply with quote

Howdy,

I recently place my G35 where the old antenna on the Right Wing was, just outboard of the wing root. Great directional location, low profile and effective. Also easy routing of coax.

Tom
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andy
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Joined: 06 Aug 2007
Posts: 1036
Location: Lake James, NC, USA

PostPosted: Fri Mar 29, 2019 8:46 am    Post subject: Reply with quote

About 12" from the wing root on the top of the wing is best to avoid having to fish a coaxial cable through too many wing ribs. It's also good to have as short a run of RG-400 cable as possible to minimize signal loss. There needs to be a little slack in the cable but you don't need a 20 foot run, which is often what comes with these units. Shortening the cable requires someone who does a good job installing RF connectors with the right tools so it doesn't cause all kinds of signal loss problems. GPS units operate at 1227.6 and 1575.42 MHZ. At that frequency even a minor connector installation defect can seriously degrade the GPS received signal level.
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1986 MX7-180
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