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01-10-2018, 01:13 PM
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Join Date: Apr 2013
Location: Kansas City, MO.
Posts: 43
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Quote:
Originally Posted by tthrew
I thought I had found my ADS-B answer - then I downloaded the GDL 82 install manual - on page 1-5 I read " the GDL 82 should not be installed with a Mode S transponder".
My RV has a Garmin GTX 330 (non ES) which I think is a Mode S. Does this mean they are not compatible? Why?
Thank You!
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Hello,
yes, this is correct. the GDL 82 will not work with the additional mode S data information the GTX 330/33 units output. They are designed to work with only mode A/C transponder units as a lower cost option for those that do not want to replace the currently working good transponder they have in the panel.
in the case of those that have a GTX 330 unit but do not have a valid WAAS GPS source. the best option will be to work with your local Garmin dealer as there are very good deals for trade ins on the 330 units to upgrade to a GTX 335 with an internal GPS unit.
Let me know if there are any other questions,
__________________
Trek Lawler
Supervisor, Aviation Field Service Engineering
Garmin International
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01-10-2018, 01:16 PM
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Join Date: Apr 2013
Location: Kansas City, MO.
Posts: 43
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Quote:
Originally Posted by RVbySDI
Just this past Monday I finalized my installation. Here is a pic of my installation location. I actually ended up moving the GDL82 about 1-1.5 in further aft than this picture displays. The instrument you can see just aft of the GDL82 is an SL30 nav/com. Directly below that, out of view, is the Garmin 327 transponder. You can see in the pic the GPS antenna is sitting on the dash underneath the windscreen. everything worked flawlessly for the performance check flight. Sent off for my FAA rebate Monday night and received confirmation that "the check is in the mail".

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Hello Steve,
so glad to hear the GDL 82 install went correctly and you were able to get the FAA rebate going. how were you able to complete the ramp check once the unit was completed? was this done locally to your field?
thanks,
__________________
Trek Lawler
Supervisor, Aviation Field Service Engineering
Garmin International
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01-10-2018, 01:40 PM
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Join Date: May 2005
Location: Tuttle, Oklahoma
Posts: 2,563
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Quote:
Originally Posted by TrekLawler
Hello Steve,
so glad to hear the GDL 82 install went correctly and you were able to get the FAA rebate going. how were you able to complete the ramp check once the unit was completed? was this done locally to your field?
thanks,
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Well, I don't even know how to reply to those questions. Please enlighten me on who exactly, besides the installer, would be "ramp checking" anything. And just exactly to what "ramp check" are you referring?
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01-10-2018, 02:40 PM
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Join Date: Apr 2013
Location: Kansas City, MO.
Posts: 43
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Quote:
Originally Posted by RVbySDI
Well, I don't even know how to reply to those questions. Please enlighten me on who exactly, besides the installer, would be "ramp checking" anything. And just exactly to what "ramp check" are you referring?
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No worries Steve,
the reason I ask is we've had a lot of questions regarding this. if you take a look at the install manual you'll notice in section 3.4.3 that a ramp tester is required to verify the correct operation of the existing transponder in the system before installing the GDL 82. just wondering if these steps were completed in the installation of your unit.
__________________
Trek Lawler
Supervisor, Aviation Field Service Engineering
Garmin International
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01-10-2018, 03:09 PM
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Join Date: May 2005
Location: Tuttle, Oklahoma
Posts: 2,563
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Quote:
Originally Posted by TrekLawler
No worries Steve,
the reason I ask is we've had a lot of questions regarding this. if you take a look at the install manual you'll notice in section 3.4.3 that a ramp tester is required to verify the correct operation of the existing transponder in the system before installing the GDL 82. just wondering if these steps were completed in the installation of your unit.
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Ok, well the transponder was not checked during the installation. However, the transponder has never had any issues of concern in all the years of flying. It has passed the transponder checks in the past and there has been no indication currently to show it is not performing within required parameters as expected. I can and will have the transponder checked when able to do so but, no, it was not checked this weekend.
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01-10-2018, 03:49 PM
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Join Date: Jan 2005
Location: Tulsa, OK
Posts: 1,015
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As I just had the transponder check done post the Oshkosh software update to my 327 I assume this will suffice? Planning to install the GDL82 next week.
Figs
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01-12-2018, 12:32 PM
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Join Date: Jan 2015
Location: Peoria, IL
Posts: 69
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Quote:
Originally Posted by TrekLawler
Hello,
yes, this is correct. the GDL 82 will not work with the additional mode S data information the GTX 330/33 units output. They are designed to work with only mode A/C transponder units as a lower cost option for those that do not want to replace the currently working good transponder they have in the panel.
in the case of those that have a GTX 330 unit but do not have a valid WAAS GPS source. the best option will be to work with your local Garmin dealer as there are very good deals for trade ins on the 330 units to upgrade to a GTX 335 with an internal GPS unit.
Let me know if there are any other questions,
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Thank you for the information and explanation, Trek. As you state above - I will have to find another way, as the GTX330 and GDL 82 are not compatible (darn).
__________________
Tim
RV-7A N54LH O360 CS 1000+ Hobbs
Joined VAF 2015
2019 VAF dues Paid
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01-12-2018, 04:04 PM
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Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,574
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Quote:
Originally Posted by RVbySDI
everything worked flawlessly for the performance check flight. Sent off for my FAA rebate Monday night and received confirmation that "the check is in the mail".

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Oh! I was under the impression that the rebates were all used up. Are there still rebates?
I'm eagerly awaiting my GDL-82 arrival.
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!! 
VAF donation Jan 2020
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01-12-2018, 04:27 PM
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Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,574
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Quote:
Originally Posted by RV8JD
Here, let me Google that for you:
https://www.faa.gov/nextgen/equipadsb/rebate/
"Thank you for participating in the FAA's rebate program. We are no longer accepting new reservations, but if you have an existing reservation, please complete the final steps:"
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I guess I don't know what that means. I didn't think you could have a reservation prior to installing the unit. They just started shipping a few weeks ago, after the note you quote was posted. So how did RVbySDI get a reservation?
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!! 
VAF donation Jan 2020
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01-12-2018, 04:46 PM
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Join Date: Oct 2006
Location: Southeast
Posts: 569
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I got a reservation the day before the program expired last September and set the installation date as far into the future as I could, 150 days, which turned out to be 2/11/18. I chose one of the approved systems listed, knowing that I could change that when I applied for the rebate. I had ordered a GDL-82 from SteinAir. The FAA sent me a reminder yesterday that I had an unclaimed rebate, stating that the program will close for rebate claims after 2/15/18.
My GDL-82 in enroute from SteinAir now, so I hope to get it installed within the next couple of weeks so I can complete the steps to get the rebate.
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