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Tube Substitutions for:
1T4
Remote Cutoff RF Pentode
TypeSubstitutesBase Diagram
1T41L4, 1U4, 1AE4*, 1AF4*, 1AJ4*, 1AM4*, 1T4SF*, 1T4WA
Notes:* - Parallel filaments
Web References1T4 (Mazda-Belvu) @ Franks Electron Tubes
1T4 (General Electric) @ Franks Electron Tubes
1T4 (Brimar) @ Franks Electron Tubes
1T4 @ RadioMuseum.org
Sylvania Type 1T4
REMOTE CUTOFF R F PENTODE



MECHANICAL DATA

Bulb T-51/2
Outline 5-2
Base1 Miniature Button 7-Pin
Basing 6AR
Mounting Position Any


ELECTRICAL DATA


FILAMENT CHARACTERISTICS
Filament Voltage D C 1.4 Volts
Filament Current 50 Ma
Filament Voltage D C (Abs. Max.) 1.6

DIRECT INTERELECTRODE CAPACITANCES (Shielded1)
Grid to Plate 0.01 ��f Max
Input 3.6 ��f
Output 7.5 ��f

MAXIMUM RATINGS (Design Center Values)
Plate Voltage 90 Volts
Grid No. 2 Voltage 90 Volts
Positive Grid No. 1 Voltage 0 Volts
Total Cathode Current 5.5 Ma

CHARACTERISTICS AND TYPICAL OPERATION
Class A1 Amplifier
Plate Voltage 45 67.5 90 90 Volts
Grid No. 2 Voltage 45 67.5 90 90 Volts
Grid No. 1 Voltage 0 0 0 0 Volts
Plate Current 1.7 3.4 1.8 3.5 Ma
Grid No. 2 Current 0.7 1.5 0.65 Ma
Transconductance 700 875 750 900 �mhos
Plate Resistance (approx.) 0.35 0.25 0.8 0.5 Megohm
Grid No. 1 Bias for 10�mhos -10 -16 -10 -16 Volts

NOTES:

1 Shield No. 316 connected to Pin 1.

APPLICATION

Sylvania Type 1T4 is an r f remote cutoff pentode of the miniature style of construction. It is especially designed for radio frequency amplifier service in compact, light weight, portable equipment.


AVERAGE PLATE CHARACTERISTICS (Triode Connected)



AVERAGE TRANSFER CHARACTERISTICS



AVERAGE PLATE CHARACTERISTICS




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