Heathkit HW-19 10-Meter "Tener" Transceiver Receiver type: Superregenerative detector with RF amplifier stage Sensitivity: Usable with signals as low as 1 microvolt at antenna terminals Speaker size: 3½" (round) Audio power output: Approximately 1 watt (undistorted) Transmitter power input to Final RF amplifier: Approx. 5 watts Frequency control: Quartz crystal: 3rd overtone Power requirements: 6V @ 1.8 amps or 12 V @ 0.9 amps Cabinet dimensions: 8" H. x 6" D. x 9¾" W