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Tube Substitutions for:
112A
Detector Amplifier Triode
TypeSubstitutesBase Diagram
112A12A
Web References112A (RCA) @ Franks Electron Tubes
112A @ RadioMuseum.org
RCA Type 112A
DETECTOR, AMPLIFIER



MECHANICAL DATA

Bulb S-14
Base Medium 4 Pin
Basing 4D


ELECTRICAL DATA


FILAMENT CHARACTERISTICS
Filament Voltage 5.0 Volts
Filament Current 0.25 Amps

DIRECT INTERELECTRODE CAPACATIES
Grid-Plate Capacitance 8.5 ��f
Grid-Filament Capacitance 4.0 ��f
Plate-Filament Capacitance 2.0 ��f

MAXIMUM RATINGS
Plate Voltage 90 135 180 Volts
Grid Voltage -4.5 -9.0 -13.5 Volts
Plate Current 5.0 6.2 7.7 Ma
Plate Resistance 5400 5100 4700 Ohms
Amplification Factor 8.5 8.5 8.5 x
Transconductance 1575 1650 1800 �mhos
Load Resistance 5000 9000 10650 Ohms
Undistorted Power Output 0.035 0.13 0.285 Watts


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