On Wednesday, September 5, 2012 5:27:09 PM UTC-4, K wrote:
On Sunday, September 2, 2012 8:22:36 PM UTC-6, Dave Springford wrote:

Trig TT21 $2050







New in box







The TT21 system is the smallest, lightest, Mode S general aviation transponder. This two part system, includes an integrated altitude encoder.



A small control unit mounts in a 57 mm hole in the panel and the rest of the unit can be mounted anywhere.







contact dave at foxonecorp.com



I am interested in buying this and I am wondering, With this unit being a Class 2 transponder, What happens above 15,000 feet? I fly in places where the good days occasionally allow for climbs and some cruising above this. Thanks

Over 15000 you would want the Trig22. The Trig21 is only certified to 15K. Of course, who would know?