THE BUILT-IN POWER SUPPLY ALLOWS BASE OPERATION FROM A 120 OR 240-VOLT AC SOURCE OR MOBILE OPERATION STB-1102 NONE FROM A 12-VOLT DC SOURCE. THE UNIT HAS 45 TRANSISTORS. AND USES TWO 7984 TUBES AS THE FINAL RF AMPLIFIER. OPTIONAL ACCESSORI ES INCLUDE THE MR100 MOBILE RACK. AT-23 AND 24 ANTENNA TUNERS, RCM AND RCB REMOTE CONTROL HEADS. OPS/ RU-6 REPEATER, AND VARIOUS MICROPHONES. ANTENNAS AND CONNECTING CABLES. PRICE VARIED DEPENDING ON CHOICE OF EMISSION OPTIONS AND NUMBER OF CHANNELS INSTALLED.