Abstract:View related articles1975 SHORT COMMUNICATIONS 107 mHz, type 445E-311el) attached to a Ground Plane antenna were used to receive tbe transmissions from the sprung traps. Using a Doe metre whip antenna on the transmitters, signals from at least 2 km away were easily picked up. The receiver was usually left switcbed on, or ehe checks were made every two hours for transmission from sprung traps.The transmitter was housed in a tJ1rce..ounoe plastic Manoplast specimen container, and the batteries in a Kodak DI6… Show more
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