NJ7P Tube Database Search

864
Low-Mu Triode

Base & Bulb ( ARRL HB -1947)

Mechanical Data

EIA Base ...................................... 4D

Electrical Data

Heater Voltage ................................ 1.1 V
Heater Current ................................ 0.25 A

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 135 V
Grid No. 1 Voltage ............................ -9 V
Plate Current ................................. 3.3 mA

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 90 V
Grid No. 1 Voltage ............................ -4.5 V
Amplification Factor .......................... 2000
Plate Resistance (approx) ..................... 1.5M Ω
Transconductance .............................. 1400 µ
Plate Current ................................. 2.9 mA

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