Created: Dec 09, 2014
No description available.
This transmitter can be used for transmitter hunts, for remote key finding, or for radio telemetry in model rockets. It can be tuned to the two meter band or other VHF bands by charging C1 and L1. L1 is four turns of #20 enameled wire airwound, 0.25 inch in diameter (use a drill bit), 0.2 inch long, center-tapped. The antenna can be 18 inches of any type of wire. U2 functions as an audio oscillator that is turned ON and OFF by U1 about once per second. The range of the transmitter is several hundred yards.