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Jrlumpp wrote: My point being is that any discount by Avidyne on their transponder is cancelled out by the $2,000 unlock charge from Aspen to allow it to display on a pro 1000. The Aspen rep told me that their ads b unit has no unlock charge and puts traffic in 3D on their pro 1000 with synthetic vision. For those doing a Avidyne/Aspen install with ads b , the choice seems to be Aspen for the transponder.

As far as I am aware, Aspen doesn't make a "transponder".  They make ADS-B transceivers which provide ADS_B out compliance and some models also have "in" capability.  I may be wrong here, but I think you would still need a transponder in addition to Aspen's "ADS-B Solution".

I have the Aspen 2000 with SVT.

I may well have it wrong, but when I added active traffic (TAS605A), the traffic symbology shows up on my Aspens without upcharge.

May not be the same if you don't have SVT.

Just to clarify, you pay the unlock charge if you use other than Aspen ads b in technology. This is how it was explained to me.