![]() ![]() The 51S-1A/ 1AF Receiver requires 28 volts dc at 4.5 amperes. The 51S-1B requires 115-volt, single-phase, 50- to 400-Hz power at approximately 125 watts. The 51S-1 and 51S-1F Receivers require 115-or 230-volt, single-phase, 50- to 400-Hz power at approximately 125 watts. The 51S-1B is similar to the 51S-1, but it has a rear-mounted junction box that provides military-type connectors for power, control, audio, and antenna lines. The rack-mounted ac version is model 51S-1F, while the rack-mounted dc version is model 51S-1AF. ![]() The 51S-1A is similar, except that it is fitted with a 28-volt dc transistorized power supply. The model 51S-1 is mounted in a perforated wrap-around cabinet and equipped with an ac power supply capable of 115- or 230-volt, single-phase, 50-to 400-Hz operation. Coverage is continuous in thirty 1-megahertz bands. The 51S-1/1A/1F/1AF/1B Receiver receives USB, LSB, AM, and CW signals in the range of 0.2 to 30.0 MHz. 51S-1 Detailed Physical & Operational Description ![]()
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