NJ7P SQL Tube Database Query

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4X150A
Power Tetrode

EIA Base & Outline

EIA Base: F75

Substitute Data

Preferred Substitutes ......................... 7034/4X150A

4X150A
Power Tetrode

EIA Base: F75

Mechanical Data

EIA Base ...................................... F75

EIA Base ...................................... F75

Electrical Data

Heater Voltage ................................ 6 V
Heater Current ................................ 2.6 A

Heater Voltage ................................ 6 V
Heater Current ................................ 2.6 A

Direct Interelectrode Capacitances (approx)

Tetrode
Input ......................................... 15.5 pf
Output ........................................ 4.5 pf
Grid to Plate ................................. 0.03 pf

Tetrode
Input ......................................... 16 pf
Output ........................................ 4.4 pf
Grid to Plate ................................. 0.03 pf

Maximum Ratings (Design Center Values)

Tetrode
Plate Voltage ................................. 1250 V
Grid No. 2 Voltage ............................ 400 V
Plate Dissipation ............................. 150 W
Grid No. 2 Dissipation ........................ 12 W

Tetrode
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 250 W
Grid No. 2 Dissipation ........................ 12 W

Characteristics and Typical Operation

Class C Oscillator/Amplifier
Plate Voltage ................................. 1250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -90 V
Grid No. 1 Current ............................ 10 mA
Plate Current ................................. 200 mA
Grid No. 2 Current ............................ 20 mA
Driving Power ................................. 0.8 W
Power Output (approx) ......................... 195 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 1000 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -105 V
Grid No. 1 Current ............................ 15 mA
Plate Current ................................. 200 mA
Grid No. 2 Current ............................ 20 mA
Driving Power ................................. 2 W
Power Output (approx) ......................... 140 W

Push Pull Class AB2 Amplifier
Plate Voltage ................................. 1250 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -44 V
Peak Grid No. 1 Voltage........................ 100 V
Plate Current ................................. 475 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 65 mA
Driving Power ................................. 0.15 W
Load Resistance ............................... 5.6K Ω
Power Output (approx) ......................... 425 W

Class C Oscillator/Amplifier
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -88 V
Grid No. 1 Current ............................ 8 mA
Plate Current ................................. 250 mA
Grid No. 2 Current ............................ 24 mA
Driving Power ................................. 2.5 W
Power Output (approx) ......................... 370 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 1600 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -118 V
Grid No. 1 Current ............................ 5 mA
Plate Current ................................. 200 mA
Grid No. 2 Current ............................ 23 mA
Driving Power ................................. 3 W
Power Output (approx) ......................... 230 W

Push Pull Class AB2 Amplifier
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -50 V
Peak Grid No. 1 Voltage........................ 106 V
Plate Current (Zero Signal) ................... 100 mA
Plate Current (Maximum Signal) ................ 500 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 36 mA
Driving Power ................................. 0.2 W
Load Resistance ............................... 8.1K Ω
Power Output (approx) ......................... 630 W

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -50 V
Peak Grid No. 1 Voltage........................ 100 V
Plate Current (Zero Signal) ................... 100 mA
Plate Current (Maximum Signal) ................ 470 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 36 mA
Driving Power ................................. 0 W
Load Resistance ............................... 8.76K Ω
Power Output (approx) ......................... 580 W

Class AB1 Amplifier
Plate Voltage ................................. 1000 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -50 V
Peak Grid No. 1 Voltage........................ 50 V
Plate Current (Zero Signal) ................... 50 mA
Plate Current (Maximum Signal) ................ 225 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 11 mA
Driving Power ................................. 0 W
Power Output (approx) ......................... 115 W

Class AB1 Amplifier
Plate Voltage ................................. 1500 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -50 V
Peak Grid No. 1 Voltage........................ 50 V
Plate Current (Zero Signal) ................... 50 mA
Plate Current (Maximum Signal) ................ 225 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 11 mA
Driving Power ................................. 0 W
Power Output (approx) ......................... 200 W

Class AB1 Amplifier
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -50 V
Peak Grid No. 1 Voltage........................ 50 V
Plate Current (Zero Signal) ................... 50 mA
Plate Current (Maximum Signal) ................ 225 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 11 mA
Driving Power ................................. 0 W
Power Output (approx) ......................... 250 W

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Thu, 20 Jan 2022 16:33:14 -0700