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Tube Substitutions for:
34
Remote Cutoff Pentode

Type	Substitutes	Base Diagram
34	1A4, 1B4, 32, 1A4P, 1A4T, 1B4G, 1B4P, 1B4T, 951, 1C4*, 1K4*
Notes:	* - Parallel filaments
Web References	34 (RCA) @ Franks Electron Tubes 34 (RCA (HB3)) @ Franks Electron Tubes 34 (Sylvania) @ Franks Electron Tubes 34 (Tung-Sol) @ Franks Electron Tubes 34 @ RadioMuseum.org

RCA Type 34
SUPER-CONTROL R-F AMPLIFIER PENTODE


MECHANICAL DATA

Bulb	ST-14
Base	Medium 4 Pin
Basing	4M

ELECTRICAL DATA

FILAMENT CHARACTERISTICS

Filament Voltage	2.0	Volts
Filament Current	0.060	Amps

DIRECT INTERELECTRODE CAPACATIES

Grid-Plate Capacitance (with shield-can)	0.015	��f
Input Capacitance	6.0	��f
Output Capacitance	11.5	��f

MAXIMUM RATINGS

Plate Voltage	67.5	135	180	Volts
Screen Voltage (Grid No. 2)1	67.5	135	180	Volts
Grid Voltage, Variable (Grid No. 1)	-3.0	-3.0	-3.0	Volts
Plate Current	2.7	2.8	2.8	Ma
Screen Current (Maximum)	1.1	1.0	1.0	Ma
Plate Resistance	0.4	0.6	1.0	Megohms
Transconductance	560	600	620	�mhos
Transconductance (at -22.5 volts bias)	15	15	15	�mhos

NOTES:

1	Under conditions of maximum plate current

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