Details
Test equipment:
a Tester for Valve Transformers with blueprint instructions in lid, rheostat, three tapped inductance and three Under Test/Standard switches, block mounting for two horizontal valves, marked No. 1, and mahogany case with lid -- 119in. (48.5cm.) wide (hinges defective); another, No. 3 (lacking lid, poor condition); a Tester No. 30, with galvonometer, four tapped inductances, blueprint instructions in lid and (empty) compartment in base; an Audibility Meter, Type 164, by General Radio Co, Cambridge, Mass.; and a milliammeter in teak case with Microphone 1 & 2 changeover switch and sliding resistance coil (5)
a Tester for Valve Transformers with blueprint instructions in lid, rheostat, three tapped inductance and three Under Test/Standard switches, block mounting for two horizontal valves, marked No. 1, and mahogany case with lid -- 119in. (48.5cm.) wide (hinges defective); another, No. 3 (lacking lid, poor condition); a Tester No. 30, with galvonometer, four tapped inductances, blueprint instructions in lid and (empty) compartment in base; an Audibility Meter, Type 164, by General Radio Co, Cambridge, Mass.; and a milliammeter in teak case with Microphone 1 & 2 changeover switch and sliding resistance coil (5)