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Updating to ADS-B Out w Skyview and Trig TT22 (Read 441 times)
May 2nd, 2018 at 1:53pm

dpdepperschmidt   Offline
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I will be making the plunge to get my experimental Kitfox ADS-B out ready.  I did not build it, so will appreciate any guidance I can get. 

The installed transponder is the Trig TT22.  It is working fine with the Skyview system.  I have two screens. 

My research tells me I will need the Trig TN70 GPS system to make everything work.  I am assuming it is not possible to use the Dynon OEM version, is that correct?

The connections between units is not completely clear to me.  For the GPS coax, would a single connection to the TN70 supply the Dynon system what it needs?  That assumes the TN70 and TT22 are connected.  Or will I need to connect both Skyview displays and the TN70 to the coax?

I will contact Trig as well, but it seems that much of the connection information will concern the Dynon. 

Thanks in advance for any guidance you can provide.
 
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Reply #1 - May 2nd, 2018 at 2:07pm

RayInGA   Offline
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All you'll need for ADS-B OUT compliance is the Dynon GPS-2020 antenna. Wire it to both screens (RS232) and you are done.

If you already have a GPS-250, you can just replace it and connect to the same wires (it should already be wired to both screens) or you can opt to keep the 250 for redundancy (which is what I did but more difficult).

 

Ray Eaker
RV-7A flying since 27 Jan 2017
Dual Skyview 1000T with all available Dynon VFR goodies
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Reply #2 - May 2nd, 2018 at 2:33pm

dpdepperschmidt   Offline
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You just made my month! Not only is that a much less expensive option, but all I would have to replace is the actual GPS receiver. The cables are already run to the two screens. That cable should be OK, right?  While redundancy would be nice, I have an ADS-B in that would be a backup if necessary.  So I will pull the original GPS receiver. 

Then I would imagine I would need to formally set up the system for official ADS-B out?

Surely it can't be this easy!
« Last Edit: May 2nd, 2018 at 2:34pm by dpdepperschmidt »  
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Reply #3 - May 2nd, 2018 at 5:20pm

Dynon Avionics   Offline
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So, to be clear:

If you have the SV-XPNDR-261, which is a custom (but different) version of the Trig TT22, you can connect our SV-GPS-2020 as a position source via SkyView.

If you have an "actual" Trig TT22 (with a Trig control head), it can not be connected to SkyView or use our SV-GPS-2020 as a position source. You'll need to check with Trig for what the available options are here for compliance.

To boil it down: if you're controlling your transponder via SkyView, you have the Dynon version. If you have a Trig control head, you have the trig version. Only the Dynon version is compatible with the SV-GPS-2020.
 

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Reply #4 - May 3rd, 2018 at 6:49am

dpdepperschmidt   Offline
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Still not quite clear....

I use the Dynon to control the Trig TT22 now.  I have no control head for the Trig. 

So that means my Trig TT22 will work with the GPS-2020?
 
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Reply #5 - May 3rd, 2018 at 6:52am

RayInGA   Offline
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dpdepperschmidt wrote on May 3rd, 2018 at 6:49am:
Still not quite clear....

I use the Dynon to control the Trig TT22 now. I have no control head for the Trig.

So that means my Trig TT22 will work with the GPS-2020?


Yes. I had assumed, based on your original post, that you were controlling the Trig TT22/261 via Skyview and likely had a GPS-250 antenna.

Just swap out the 250 for the 2020, configure it in the Skyview go fly. Then get a performance report from the FAA (they recommend monthly) to ensure you meet requirements.
 

Ray Eaker
RV-7A flying since 27 Jan 2017
Dual Skyview 1000T with all available Dynon VFR goodies
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Reply #6 - May 3rd, 2018 at 7:08am

dpdepperschmidt   Offline
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Thanks Ray,

I am going with your suggestion as it simply seems more logical. 

Thanks for your help!
 
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Reply #7 - May 19th, 2018 at 6:18am

kellym   Offline
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dpdepperschmidt wrote on May 3rd, 2018 at 7:08am:
Thanks Ray,

I am going with your suggestion as it simply seems more logical.

Thanks for your help!


To be clear, you need to have the Dynon labeled version of the TT22 and is should have added a sticker for a software update that came out a couple years ago for compliance with the final ADS-B rule (I don't remember the version.)
I suspect you could simply take a picture of the serial number label and email to Dynon support to verify you have the Dynon version, before you spend any money, to avoid taking the wrong fork in the road.
 
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