Tracking Transmitter mk1
ARB144CWTmk1
The ARB144CWT transmitter is a crystal controlled on-off-carrier (OOC) transmitter designed for model rockets but suitable for wildlife, balloons and many other applications requiring a small, frequency stable transmitter. The transmitter works best with a receiver that has CW mode, however an FM receiver or scanner can be used if it has a S meter which can be observed during operation. Transmitter ground range is approximately 500 meters (5 feet above ground)* .
Depending on what you use for a battery will determine on how long it will last in the field. I have had one on test using a AAA 1.5v battery for 12 months now . Air to ground transmission range can be substantially greater than ground-to-ground range. Also the range can be increased significantly by using a directional high gain antenna or a more sensitive receiver.
You can use this transmitter for many uses like putting on a mammals collar for tracking or for your model rocket or aeroplane to locate after a crash landing.
You will need suitable equipment to use this transmitter correctly.
This gives you more idea of how big the transmitter actually is.