Home  Resources  References  Tubes  Forums  Links  Support  Sale 

Tube Substitutions for:
1A4
Remote Cutoff Tetrode
TypeSubstitutesBase Diagram
1A41A4P, 1A4T, 1B4, 1B4G, 1B4T, 951, 32, 34, 1C4*, 1K4*
Notes:* - Parallel filaments
Web References1A4 (RCA) @ Franks Electron Tubes
1A4 (RCA (HB3)) @ Franks Electron Tubes
1A4 @ RadioMuseum.org
Sylvania Type 1A4
TETRODE



MECHANICAL DATA

Bulb ST-12
Basing 4K


ELECTRICAL DATA


FILAMENT CHARACTERISTICS
Filament Voltage 2.0 Volts
Filament Current 0.06 Amps


ELECTRICAL DATA


MAXIMUM RATINGS (Design Center)
R F Amplifier
Plate Voltage 90 180 Volts
Screen Voltage 67.5 67.5 Volts
Grid Voltage -3.0 -3.0 Volts
Plate Current 2.2 2.3 Ma
Screen Current 0.9 0.8 Ma
Plate Resistance 0.6 1.0 Megohm
Transconductance 720 750 �mhos


© 1996-2021 Nostalgia Air