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Tube Substitutions for:
951
Tetrode
TypeSubstitutesBase Diagram
9511A4, 1A4P, 1A4T, 1B4P, 1B4G, 1B4T, 32, 34, 1C4*, 1K4*
Notes:* - Parallel filaments
Web References951 @ RadioMuseum.org
Raytheon Type 951
PENTODE AMPLIFIER



MECHANICAL DATA

Bulb ST-12
Base Medium 4 Pin
Basing 4M


ELECTRICAL DATA


FILAMENT CHARACTERISTICS
Filament Voltage 2.0 Volts
Filament Current 0.060 Amps

DIRECT INTERELECTRODE CAPACITANCES
Grid to Plate 0.0071 ��f
Input 5 ��f
Output 11 ��f

MAXIMUM RATINGS
Amplifier - Class A
Plate Voltage 90 180 Volts
Screen Voltage 67.5 67.5 Volts
Grid Bias -3 -3 Volts
Amplification Factor 600 975 x
Plate Resistance 1 1.5 Megohms
Transconductance 600 650 �mhos
Plate Current 1.6 1.7 Ma
Screen Current 0.7 0.6 Ma
Grid Bias for Plate Current Cutoff -8 -8 Volts

NOTES:

1 With tube shield.


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