NJ7P SQL Tube Database Query

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8072
Beam Power Tube

EIA Base & Outline

Mechanical Data

EIA Base ...................................... F85

Electrical Data

Heater Voltage ................................ 13.5 V
Heater Current ................................ 1.3 A

Direct Interelectrode Capacitances (approx)

Tetrode
Input ......................................... 16 pf
Output ........................................ 6.5 pf
Grid to Plate ................................. 0.13 pf

Maximum Ratings (Design Center Values)

Tetrode
Plate Voltage ................................. 2200 V
Grid No. 2 Voltage ............................ 400 V
Plate Dissipation ............................. 100 W
Grid No. 2 Dissipation ........................ 8 W

Characteristics and Typical Operation

Class C Oscillator/Amplifier 470 Mhz
Plate Voltage ................................. 700 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -30 V
Grid No. 1 Current ............................ 20 mA
Plate Current ................................. 300 mA
Grid No. 2 Current ............................ 10 mA
Driving Power ................................. 5 W
Power Output (approx) ......................... 85 W

Class C Oscillator/Amplifier 175 Mhz
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -30 V
Grid No. 1 Current ............................ 40 mA
Plate Current ................................. 300 mA
Grid No. 2 Current ............................ 30 mA
Driving Power ................................. 3 W
Power Output (approx) ......................... 70 W

Class C Oscillator/Amplifier 175 Mhz
Plate Voltage ................................. 700 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -30 V
Grid No. 1 Current ............................ 40 mA
Plate Current ................................. 300 mA
Grid No. 2 Current ............................ 20 mA
Driving Power ................................. 3 W
Power Output (approx) ......................... 105 W

Class C Oscillator/Amplifier 50 Mhz
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 160 V
Grid No. 1 Voltage ............................ -10 V
Grid No. 1 Current ............................ 50 mA
Plate Current ................................. 300 mA
Grid No. 2 Current ............................ 25 mA
Driving Power ................................. 1.2 W
Power Output (approx) ......................... 85 W

Class C Oscillator/Amplifier 50 Mhz
Plate Voltage ................................. 700 V
Grid No. 2 Voltage ............................ 175 V
Grid No. 1 Voltage ............................ -10 V
Grid No. 1 Current ............................ 50 mA
Plate Current ................................. 300 mA
Grid No. 2 Current ............................ 25 mA
Driving Power ................................. 1.2 W
Power Output (approx) ......................... 110 W

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 700 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -20 V
Grid No. 1 Current ............................ 1 mA
Plate Current (Zero Signal) ................... 100 mA
Plate Current (Maximum Signal) ................ 205 mA
Grid No. 2 Current (Zero Signal) .............. 0 mA
Grid No. 2 Current (Maximum Signal) ........... 16 mA
Driving Power ................................. 0.3 W
Power Output (approx) ......................... 80 W

If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.

(c) 1994-2021 by William A. Beech, NJ7P

Thu, 30 Jun 2022 02:53:08 -0700