NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

955
Medium-Mu Triode

EIA Base & Outline

EIA Base: 5BCEIA Bulb: 4-1
Source ........................................ GE - 1973

Mechanical Data

EIA Outline ................................... 4-1
EIA Base ...................................... 5BC

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.15 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 1.0 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 1.3 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 180 V
Plate Dissipation ............................. 1.6 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -7 V
Amplification Factor .......................... 25
Plate Resistance (approx) ..................... 11.4K Ω
Transconductance .............................. 2200 µMho
Plate Current ................................. 6.3 mA

Class A Amplifier
Plate Voltage ................................. 180 V
Grid No. 1 Voltage ............................ -5.0 V
Amplification Factor .......................... 25
Plate Resistance (approx) ..................... 12.5K Ω
Transconductance .............................. 2000 µMho
Plate Current ................................. 4.5 mA
Load Resistance ............................... 20K Ω
Power Output (approx) ......................... 0.135 W

Class A Amplifier
Plate Voltage ................................. 90 V
Grid No. 1 Voltage ............................ -2.5 V
Amplification Factor .......................... 25
Plate Resistance (approx) ..................... 14.7K Ω
Transconductance .............................. 1700 µMho
Plate Current ................................. 2.5 mA

Class C Oscillator/Amplifier
Plate Voltage ................................. 180 V
Grid No. 1 Voltage ............................ -35 V
Grid No. 1 Current ............................ 1.5 mA
Plate Current ................................. 7 mA
Power Output (approx) ......................... 0.5 W

A horizontal ribbon.

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A horizontal ribbon.

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Tue, 09 Aug 2022 06:26:05 -0700