The TED transponder antennas at Spruce are cheap and work fine -- I've had several. I broke one off each of the three times I've washed my plane -- they're fragile and it only takes a light bump to break them. I'm trying the more expensive one this time but haven't washed the plane since installing it so we'll see how it goes.

Roy

States where I've landed my 150
[Linked Image from eznec.com]