Bereskin Amplifier During the completion of the development and construction of the 3000 watt power amplifiers previously described, ... The circuit employed a pair of 1000A tubes operating Class BI push-pull with a 5 kv plate supply voltage and 1 .25 KV screen voltage. ... Audio, vol. 4, March, 1956. fig. 6 a Driver and power amplifier schematic diagram. FREQUENCY 774 High Power Audio Systems.
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