NJ7P SQL Tube Database Query

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A horizontal ribbon.

1W4
Power Pentode

EIA Base & Outline

EIA Base: 5BZEIA Bulb: 5-2

Mechanical Data

Bulb .......................................... T-5 1/2
EIA Outline ................................... 5-2
EIA Base ...................................... 5BZ

Electrical Data

Filament Voltage .............................. 1.4 DC V
Filament Current .............................. 0.05 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 3.4 pf
Output ........................................ 3.6 pf
Grid to Plate ................................. 0.12 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 110 V

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 45 V
Grid No. 2 Voltage ............................ 45 V
Grid No. 1 Voltage ............................ -4.5 V
Plate Resistance (approx) ..................... 400K Ω
Transconductance .............................. 650 µMho
Plate Current ................................. 1.6 mA
Grid No. 2 Current ............................ 0.2 mA
Load Resistance ............................... 20K Ω
Power Output (approx) ......................... 0.035 W

Class A Amplifier
Plate Voltage ................................. 62.5 V
Grid No. 2 Voltage ............................ 62.5 V
Grid No. 1 Voltage ............................ -5 V
Plate Resistance (approx) ..................... 300K Ω
Transconductance .............................. 875 µMho
Plate Current ................................. 3.8 mA
Grid No. 2 Current ............................ 0.8 mA
Load Resistance ............................... 16K Ω
Power Output (approx) ......................... 0.09 W

Class A Amplifier
Plate Voltage ................................. 67.5 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -6 V
Plate Resistance (approx) ..................... 300K Ω
Transconductance .............................. 875 µMho
Plate Current ................................. 3.8 mA
Grid No. 2 Current ............................ 0.8 mA
Load Resistance ............................... 16K Ω
Power Output (approx) ......................... 0.1 W

Class A Amplifier
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ -9 V
Plate Resistance (approx) ..................... 250K Ω
Transconductance .............................. 925 µMho
Plate Current ................................. 5 mA
Grid No. 2 Current ............................ 1 mA
Load Resistance ............................... 12K Ω
Power Output (approx) ......................... 0.2 W

A horizontal ribbon.

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A horizontal ribbon.

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Thu, 29 Sep 2022 22:52:21 -0700