We released a new tracking transmitter ( The MT-2001, http://byonics.com/microtrak) primarily for high altitude balloons and Drones) this year. Its a VHF, Ham Radio 2 Meter band, frequency agile transmitter with a maximum of two Watts output. The transmitter itself is 1 X 2 inches, so it seems like it might be suitable for rockets as well. My question is, what are you using for VHF antennae in high-powered rockets, if anything? Would a UHF version, working outside the "normal" APRS system suit rocketry better, since the antenna is not as ungainly ( Pun intended, for those fans of A.G. Bell and the dB) as a compromise VHF antenna. Since range with VHF transmitters versus UHF transmitters have a range nominally 6 times further, I have shied away from doing a UHF tracker or "Fox" ( Simple RDF transmitter) but I can see that a 1 meter long antenna may be a bit too much to accommodate. Your thoughts would be very welcome on this.