NJ7P SQL Tube Database Query

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3C28
Power Triode

EIA Base & Outline

Mechanical Data

EIA Base ...................................... F31

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 3.0 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 2.1 pf
Output ........................................ 0.1 pf
Grid to Plate ................................. 1.8 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 2000 V
Plate Dissipation ............................. 25 W

Characteristics and Typical Operation

Class C Oscillator/Amplifier
Plate Voltage ................................. 2000 V
Grid No. 1 Voltage ............................ -170 V
Grid No. 1 Current ............................ 17 mA
Plate Current ................................. 63 mA
Driving Power ................................. 4.5 W
Power Output (approx) ......................... 100 W

Class C Oscillator/Amplifier
Plate Voltage ................................. 1500 V
Grid No. 1 Voltage ............................ -110 V
Grid No. 1 Current ............................ 15 mA
Plate Current ................................. 67 mA
Driving Power ................................. 3.1 W
Power Output (approx) ......................... 75 W

Class C Oscillator/Amplifier
Plate Voltage ................................. 1000 V
Grid No. 1 Voltage ............................ -80 V
Grid No. 1 Current ............................ 15 mA
Plate Current ................................. 72 mA
Driving Power ................................. 2.6 W
Power Output (approx) ......................... 47 W

Push Pull Class B Amplifier
Plate Voltage ................................. 2000 V
Grid No. 1 Voltage ............................ -85 V
Peak Grid No. 1 Voltage........................ 290 V
Plate Current (Zero Signal) ................... 16 mA
Plate Current (Maximum Signal) ................ 80 mA
Driving Power ................................. 1.1 W
Load Resistance ............................... 55.5K Ω
Power Output (approx) ......................... 110 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

Sat, 02 Jul 2022 23:21:50 -0700