A Compact 3-400Z Grounded Grid Amplifier · a standard 500-watt unit that runs cold at a kilo- watt c.w. or s.s.b. The 50,000-ohm resistor in the center tap of the filament transformer

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A Compact 3-400Z Grounded Grid Amplifier · a standard 500-watt unit that runs cold at a kilo- watt c.w. or s.s.b. The 50,000-ohm resistor in the center tap of the filament transformer

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