Thorp Air Command - T18.net

I would try E-Bay first, but that may not be any less expensive than the route you're on now. You say upgrade ? But to what ? If your new panel includes a separate transponder unit (unless it is an all-in-one EFIS unit with radio, transponder, etc), then I say use that $500 now towards that new transponder. Depending on the age of your unit now, it may not be the best $$$ spent to fix it now and then later. At least with a new unit you have at least a 1 year warranty...maybe ?

Faster and Farther

RB

The new transponders do not have that expensive "cavity" that seems to give all the old transponders trouble. Money well spent on new. Some of the new glass panels have a transponder built in. I have seen on Barnstormers King 76A's for around $500. Although this is old school. Narco went out of business, stay away from the K79 or 76.