NJ7P SQL Tube Database Query

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804
Power Pentode

EIA Base & Outline

EIA Base: 5J

Mechanical Data

EIA Base ...................................... 5J

Electrical Data

Heater Voltage ................................ 7.5 V
Heater Current ................................ 3.0 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 16 pf
Output ........................................ 14.5 pf
Grid to Plate ................................. 0.01 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 1500 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 50 W
Grid No. 2 Dissipation ........................ 15 W

Characteristics and Typical Operation

Class C Amplifier
Plate Voltage ................................. 1500 V
Grid No. 3 Voltage ............................ 45 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -100 V
Grid No. 1 Current ............................ 7 mA
Plate Current ................................. 100 mA
Grid No. 2 Current ............................ 35 mA
Driving Power ................................. 1.95 W
Power Output (approx) ......................... 110 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 1250 V
Grid No. 3 Voltage ............................ 50 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -90 V
Grid No. 1 Current ............................ 6 mA
Plate Current ................................. 75 mA
Grid No. 2 Current ............................ 20 mA
Driving Power ................................. 0.75 W
Power Output (approx) ......................... 65 W

Class C Modulated Amplifier (Grid)
Plate Voltage ................................. 1500 V
Grid No. 3 Voltage ............................ 45 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -130 V
Grid No. 1 Current ............................ 3.7 mA
Plate Current ................................. 50 mA
Grid No. 2 Current ............................ 13.5 mA
Driving Power ................................. 1.3 W
Power Output (approx) ......................... 28 W

Class C Modulated Amplifier (Suppressor)
Plate Voltage ................................. 1500 V
Grid No. 3 Voltage ............................ -50 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -115 V
Grid No. 1 Current ............................ 7 mA
Plate Current ................................. 50 mA
Grid No. 2 Current ............................ 32 mA
Driving Power ................................. 0.95 W
Power Output (approx) ......................... 28 W

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Mon, 30 Jan 2023 01:33:34 -0700