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Anyone have a Garmin GA35 antenna I can borrow to troublesho
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Author:  Ryan Allen [ Thu Oct 17, 2019 6:58 pm ]
Post subject:  Anyone have a Garmin GA35 antenna I can borrow to troublesho

I think my GA35 antenna is on the fritz. Before I break open my dusty old wallet, I was hoping to borrow a GA35 antenna to make sure that was my problem. If you have one I could borrow, I would appreciate it.

FYI, my G400W will not acquire a signal now, and some of my other GPS based avionics are losing their GPS signals too. My internet research tells me this is a sign of a dying/dead GA35 antenna.

Author:  leewwalton [ Thu Oct 17, 2019 8:30 pm ]
Post subject:  Re: Anyone have a Garmin GA35 antenna I can borrow to troubl

I have a few spares I can loan one to you Ryan.

Author:  leewwalton [ Thu Oct 17, 2019 8:30 pm ]
Post subject:  Re: Anyone have a Garmin GA35 antenna I can borrow to troubl

I’d check the coax first though.

Author:  Ryan Allen [ Fri Oct 18, 2019 6:25 am ]
Post subject:  Re: Anyone have a Garmin GA35 antenna I can borrow to troubl

good idea. I'll check my coax and report back and we can go from there. Thanks for the help.

Author:  Ryan Allen [ Fri Oct 18, 2019 11:47 am ]
Post subject:  Re: Anyone have a Garmin GA35 antenna I can borrow to troubl

ok, so I checked the coax for continuity and it was good. Im not sure what else to check (if anything) regarding on the coax.

Author:  fytrplt [ Fri Oct 18, 2019 11:54 am ]
Post subject:  Re: Anyone have a Garmin GA35 antenna I can borrow to troubl

Corrosion at the connections is usually the culprit. Seat the bnc's a couple times. I have to do that with my IFF connections every so often.

Author:  thorpdrvr [ Sat Oct 19, 2019 2:36 pm ]
Post subject:  Re: Anyone have a Garmin GA35 antenna I can borrow to troubl

Any chance you are using a portable adsb receiver when problems occur?

Author:  Ryan Allen [ Sat Oct 19, 2019 2:58 pm ]
Post subject:  Re: Anyone have a Garmin GA35 antenna I can borrow to troubl

I reconnected to fittings several times now. Now I need to go for another test flight.

I do use a Skyradar which is portable. Nothing has been installed or changed (including the Skyradar) prior to my 400W and other GPS avionics going wacky. The Skyradar GPS position is one of the items which cant lock on to a position now.

Removing power from the Skyradar is on my list of things to try next flight. I even read the NASA research regarding cell phones creating interference with GPS systems, so I'll try turning my phone off too....although I've been flying for years with my phone on.

I guess the ultimate test will be to turn off the 400W in flight and see if my other GPS avionics come back online and start working again.

Author:  thorpdrvr [ Sat Oct 19, 2019 8:55 pm ]
Post subject:  Re: Anyone have a Garmin GA35 antenna I can borrow to troubl

My semi permanently mounted Stratus3 knocks out reception for an old handheld gps that uses an external antenna. A soon as I turn it off, the old gps rx works fine. The 12 volt to 5 volt usb power adapters may also have a small effect.

Author:  Ryan Allen [ Mon Oct 21, 2019 2:32 pm ]
Post subject:  Re: Anyone have a Garmin GA35 antenna I can borrow to troubl

I flew for 1.5 hours today with my 400W turned off. All my other avionics performed perfectly. I'm leaning more and more towards the 400 antenna.

Author:  Robert Sanders [ Thu Oct 24, 2019 12:46 pm ]
Post subject:  Re: Anyone have a Garmin GA35 antenna I can borrow to troubl

It is probably the antenna, I had to replace mine about a year ago, it was junk.....

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