NJ7P Tube Database Search

3LE4
Beam Power Pentode

Base & Bulb ( ARRL HB -1947)

Substitute Data

Preferred Substitutes ......................... 3LF4
Substitutes ................................... 3D6

Mechanical Data

Bulb .......................................... T-9
Base .......................................... Lock-In 8-Pin
Outline ....................................... 9-30
EIA Base ...................................... 6BA

Electrical Data

Filament Voltage .............................. 1.4/2.8 DC V
Filament Current .............................. 0.1/0.05 A

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage ............................ -6.6 V
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 2200 µ
Plate Current ................................. 10 mA
Grid No. 2 Current ............................ 1.4 mA
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 0.40 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ -9.0 V
Plate Resistance (approx) ..................... 110K Ω
Transconductance .............................. 1600 µ
Plate Current ................................. 9.0 mA
Grid No. 2 Current ............................ 1.8 mA
Load Resistance ............................... 6K Ω
Power Output (approx) ......................... 0.3 W

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