Thumbnail Filmstrip of MX Mini 377 Battery Transmitter - 216 MHz (VHF) - Leg and Tail Mount Images
(Shown here mounted on neck of gyrkin with rubber band but appropriate for hawks down to the size of a kestrel.)
MX Series of Transmitters: Mini Leg or Tail Mount 377 Battery Model.
Powerful / Long-Range Transmitter
25+ Miles Line of Sight
Weight: 2.8 Grams with Battery 377/376
5 Days Operating Life
6" Antenna @ 216-219, 173 and 432-434 MHz Replaceable Antenna
Uses Two 377 Silver Oxide Battery
Operating Range: +5F to +120F
This is a very powerful transmitter for its size and it is long range, extremely reliable and rugged and has a screw-in 6"antenna. It should be chosen for very small hawks such as merlins, perlins, male Coopers, sharpies, European sparrowhawks, kestrels, etc.. After 48 hours of use it will automatically switch to a slow pulsed/low battery saving mode signaling that it is time to change the battery.
The tail mount will fit in the Marshall Small and Medium-Micro tail clips and Micro TrackPack.
These transmitters will perform well in the field and have proven reliable over time. The pulse is slowed down on this model to give it a longer range and higher output in the smaller package.