Black coloured metal AM Speech modulator with attached microphone. Black coloured metal cylindrical Dynamotor on top, made by General Electric. Label on top stating CAUTION HIGH VOLTAGE. Blue coloured metal plate on side stating that model is MD-7/ARC-5 28 VOLTS DC NOs-74912 2280 CBY. Beside that is painted mark with US NAVY symbol and RELEASED 2-43. Was part of equipment which made up the AN/ARC-5 'Command Set'.
Microphone is no longer attached when item was inventoried 03/04/18.
MD-7/ARC-5 28 VOLTS DC NOs-74912 1180 CBY Serial Number
RELEASED 2-43 Painted
GENERAL ELECTRIC / DYNAMOTOR / MODEL 5DY83A81 Maker's Plate
CAUTION HIGH VOLTAGE Painted
United States Navy et al. Feb 1943. AM Speech Modulator, 2007.112. The Museum of Transport and Technology (MOTAT).