POWER AMPLIFIER power-amplifier tube three-electrode type battery
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RCA-3
POWER AMPLIFIER
power-amplifier tube three-electrode type battery-operated radio receivers where economy filament-current drain important.
CHARACTERISTICS
Filament Voltage C.).2.0 Volts
Filament Current .0.1 Ampere
Plate Voltage. max. Volts
Grid Voltage -22.5 Volts
Plate Current 12.3
Plate Resistance 4100 3600 Ohms
Amplification Factor
Transconductance 1050 Micromhos
Load Resistance 7000 5700 Ohms
Self-Bias Resistor. 2815 2440 Ohms
Undistorted Power Output. 0.185 0.375 Watt
Grid-Plate Capacitance .5.7
Grid-Filament Capacitance .1.5
Plate-Filament Capacitance .2.7
Bulb .ST-12
Base Small 4-Pin
INSTALLATION
Refer INSTALLATION type
APPLICATION
power amplifier, should operated shown under CHARACTERISTICS. Grid voltage obtained from C-battery, means self-bias resistor connected negative plate-return lead. latter method required where grid resistor (maximum value megohm) used. more output desired than obtained from single 31's operated either parallel push-pull connection.
average plate characteristics
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