NJ7P SQL Tube Database Query

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4D22
Beam Power Pentode

EIA Base & Outline

EIA Base: F26

Mechanical Data

EIA Base ...................................... F26

Electrical Data

Heater Voltage ................................ 12.6/25.2 V
Heater Current ................................ 1.6/0.8 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 28 pf
Output ........................................ 13 pf
Grid to Plate ................................. 0.27 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 350 V
Plate Dissipation ............................. 50 W
Grid No. 2 Dissipation ........................ 14 W

Characteristics and Typical Operation

Class C Amplifier
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -100 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 240 mA
Grid No. 2 Current ............................ 26 mA
Driving Power ................................. 1.5 W
Power Output (approx) ......................... 135 W

Class C Amplifier
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -100 V
Grid No. 1 Current ............................ 10 mA
Plate Current ................................. 215 mA
Grid No. 2 Current ............................ 30 mA
Driving Power ................................. 1.25 W
Power Output (approx) ......................... 100 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 600 V
Grid No. 1 Voltage ............................ -100 V
Grid No. 1 Current ............................ 10 mA
Plate Current ................................. 220 mA
Grid No. 2 Current ............................ 28 mA
Driving Power ................................. 1.25 W
Power Output (approx) ......................... 100 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 550 V
Grid No. 1 Voltage ............................ -100 V
Grid No. 1 Current ............................ 6 mA
Plate Current ................................. 175 mA
Grid No. 2 Current ............................ 17 mA
Driving Power ................................. 0.6 W
Power Output (approx) ......................... 70 W

Push Pull Class AB2 Amplifier
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -25 V
Peak Grid No. 1 Voltage........................ 70 V
Plate Current (Zero Signal) ................... 100 mA
Plate Current (Maximum Signal) ................ 365 mA
Grid No. 2 Current ............................ 26 mA
Driving Power ................................. 0.45 W
Load Resistance ............................... 3K Ω
Power Output (approx) ......................... 125 W

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Fri, 30 Sep 2022 00:14:21 -0700