Transponder recommendation

[grevaly]

I am looking at the Trig mode s class 1 transponder. Trig has a certified ads-b out wass gps box as an add on that is
supposed to meet ads-b out requirements... the add on is about $3500. From What I understand...transponder has to be
mode s w/squitter and class one, class two is no good. ADS-B out requires 'certified' wass enabled GPS receiver..
big dough, plus overkill for most of our missions, and cant fit in our panels. Has anyone else looked at trig?

[daleandee]

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[rizzz]

I went with the Trig TT21.
Here in Australia the Class 2 TT21 is sufficient or operations below 15000ft for aircraft with normal cruizing speeds below 170KT (referred to as ADS-B Class B0).
(See: http://www.comlaw.gov.au/Details/F2009L04631)

I don't have the GPS yet though.
In Australia we have to be fully compliant by Feb 2017, however, any new aircraft to the register after Feb 2014 have to be equipped with a compliant transponder. Also, any transponder replacement on existing aircraft have to done with be compliant transponders.
I will fly my aircraft later this year (hopefully) but since you don't need to be fully compliant, just have a compliant transponder, I am waiting with the purchase of the GPS till 2017.
Hopefully the prices will have dropped by then it is expected that they will drop now the U.S. deadline is also getting in sight.
This document exaplains the above in detail:
http://www.airservicesaustralia.com/wp- ... 8MAR12.pdf

Again, for Ozzie builders only, the U.S. seems to be going one step further requiring a Class 1 Transponder for all.

[daleandee]

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[Gripdana]

Take a look at the UAT option for ADS-B. It does not require anything more then a mode c transponder. It is different then using a transponder and ADS-B in/out equipment. And is a less expensive option. The one I have been looking at is approved and has a built in GPS. It will be one unit to get compliant.

[Bruce593SX]

Keep reading before you spend a fortune, all you need is a regular old mode c transponder and a UAT box that has a certified waas GPS. Don't buy one yet, there are quite a number of companies with these boxes still in development

[DCASonex]

Starting to see a lot of push back on the requirements for this from AOPA, noting cost and poor return on investment plus appears that conventional mode C will also still be required. Would hold off on any transponder purchase as long as possible.

David A.

[Bryan Cotton]

Some years ago I bought an old KT76A and encoder for the hummelbird, which I plan to use on the Waiex. I may get my money's worth out of it yet.

[fastj22]

I have an old Garmin mode C I bought off Barnstormers for $500. If I were to buy a new one now, I'd probably get that Trig21 which is upgradeable to ADS-B out later.

[jerryhain]

From AOPA news:
For some other types of aircraft, including experimental aircraft, no path to compliance currently exists.

“ADS-B compliance requires a supplemental type certificate or new type certificate for the aircraft where it will be installed,” the letter explained. “But since experimental aircraft, by definition, are one of a kind and do not have type certificates, no supplemental type certificate can be issued.”

May want to wait a bit before spending $5k