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Tube Substitutions for:
43
Power Pentode
TypeSubstitutesBase Diagram
4343MG
Web References43 (RCA) @ Franks Electron Tubes
43 (RCA (HB3)) @ Franks Electron Tubes
43 (Sylvania) @ Franks Electron Tubes
43 (Tung-Sol) @ Franks Electron Tubes
43 (Brimar) @ Franks Electron Tubes
43 @ RadioMuseum.org
RCA Type 43
POWER AMPLIFIER PENTODE



MECHANICAL DATA

Bulb ST-14
Base 6-Prong Medium Base
Basing 6B


ELECTRICAL DATA


HEATER CHARACTERISTICS
Heater Voltage 25.3 Volts
Heater Current 0.3 Amps

MAXIMUM RATINGS
Plate Voltage 160 Volts
Screen Voltage 135 Max
Plate Dissipation 5.3 Watts
Screen Dissipation 1.9 Watts

CHARACTERISTICS AND TYPICAL OPERATION
CLASS A1 AMPLIFIER (Each Section)
Plate Voltage 95 135 160 Volts
Screen Voltage 95 135 120 Volts
Grid Voltage -15 -20 -18 Volts
Peak A-F Grid Voltage 15 20 18 Volts
Zero-Signal Plate Current 20 27 33 Ma
Max-Signal Plate Current 22 29 36 Ma
Zero-Signal Screen Current 4 8 6.5 Ma
Max-Signal Screen Current 8 14 12 Ma
Plate Resistance (Approx.) 45000 35000 42000 Ohms
Transconductance 2000 2450 2375 �mhos
Load Resistance 4500 4000 5000 Ohms
Total Harmonic Distortion 11 9 10 Percent
Max-Signal Power Output 0.9 2.0 2.2 Watts


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