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SIDESLIP
Joined: 14 Oct 2012
Posts: 78
Location: CYOO
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 Posted: Fri Sep 25, 2015 2:40 am Post subject: Garmin Brain Teaser... 320A Transponder issue.... |
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Avionics experts can't seem to help.... Maybe someone here can. Mounted in a Zodiac 601 XL-B is the above Transponder and encoder. Avionics experts tested it on the ground, no engine running. Antenna is shielded. Turned on, and ran tests. PERFECT signal and perfect parameters.
HOWEVER....
In flight, ATC CANNOT get ANY read on me for about 15-20mins. But they do get a read eventually for the most part. Sometimes they get me as soon as I hit 2000'asl. (460' elevation). Now.... This is secondary radar out of Toronto, approx 45sm away. Two days ago, I took off, no read, not even Mode A. Nada. Made a 9 min flight north, then east further away from the radar station and after about 15mins, she got a perfect signal on me. Transponder matched my altitude and Ground speed no problem. Again.... Avionics specialist ran the system through extensive testing and the second we fire it up, and run it through its paces, comes back ultra strong. No issues.
Any idea?!
Cheers!
Chad
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C-GYXQ. 912ULS. 601XL-B |
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William Halverson
Joined: 27 Feb 2010
Posts: 88
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| Posted: Fri Sep 25, 2015 2:58 am Post subject: Garmin Brain Teaser... 320A Transponder issue.... |
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How does it work in a different a/c?
Typos courtesy of Siri
| Quote: | On Sep 25, 2015, at 06:40, SIDESLIP <Chad2007(at)rogers.com> wrote:
Avionics experts can't seem to help.... Maybe someone here can. Mounted in a Zodiac 601 XL-B is the above Transponder and encoder. Avionics experts tested it on the ground, no engine running. Antenna is shielded. Turned on, and ran tests. PERFECT signal and perfect parameters.
HOWEVER....
In flight, ATC CANNOT get ANY read on me for about 15-20mins. But they do get a read eventually for the most part. Sometimes they get me as soon as I hit 2000'asl. (460' elevation). Now.... This is secondary radar out of Toronto, approx 45sm away. Two days ago, I took off, no read, not even Mode A. Nada. Made a 9 min flight north, then east further away from the radar station and after about 15mins, she got a perfect signal on me. Transponder matched my altitude and Ground speed no problem. Again.... Avionics specialist ran the system through extensive testing and the second we fire it up, and run it through its paces, comes back ultra strong. No issues.
Any idea?!
Cheers!
Chad
--------
C-GYXQ. 912ULS. 601XL-B
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=447428#447428
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SIDESLIP
Joined: 14 Oct 2012
Posts: 78
Location: CYOO
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| Posted: Fri Sep 25, 2015 3:03 am Post subject: Re: Garmin Brain Teaser... 320A Transponder issue.... |
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I have no way of trying it. No one I know has the same TX.
Cheers!
Chad
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ceengland7(at)gmail.com
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| Posted: Fri Sep 25, 2015 5:18 am Post subject: Garmin Brain Teaser... 320A Transponder issue.... |
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On September 25, 2015 5:40:22 AM CDT, SIDESLIP <Chad2007(at)rogers.com> wrote:[quote] [quote]--> Avionics-List message posted by: "SIDESLIP" <Chad2007(at)rogers.com>Avionics experts can't seem to help.... Maybe someone here can. Mounted in a Zodiac 601 XL-B is the above Transponder and encoder. Avionics experts tested it on the ground, no engine running. Antenna is shielded. Turned on, and ran tests. PERFECT signal and perfect parameters. HOWEVER....In flight, ATC CANNOT get ANY read on me for about 15-20mins. But they do get a read eventually for the most part. Sometimes they get me as soon as I hit 2000'asl. (460' elevation). Now.... This is secondary radar out of Toronto, approx 45sm away. Two days ago, I took off, no read, not even Mode A. Nada. Made a 9 min flight north, then east further away from the radar station and after about 15mins, she got a perfect signal on me. Transponder matched my altitude and Ground speed no problem. Again.... Avionics specialist ran the system through extensive testing and he Web --
Sent from my Android device with K-9 Mail. Please excuse my brevity. [quote][b]
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skywagon
Joined: 11 Feb 2006
Posts: 184
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| Posted: Fri Sep 25, 2015 8:43 am Post subject: Garmin Brain Teaser... 320A Transponder issue.... |
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Keep in mind that parts of this system have a stabilization heater associated in the transponder system. Sometimes I have seen those take more than 10 mins. to get the altitude encoder to stabilize at a fixed temp. The newer transponder units stay quiet until stabilized. If you are operating in cold weather, it may take even longer to get a solid reading. Let us know what you find out. . .
[quote] ---
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