NJ7P SQL Tube Database Query

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282A
Power Tetrode

EIA Base & Outline

Mechanical Data

EIA Base ...................................... T4C

Electrical Data

Heater Voltage ................................ 10 V
Heater Current ................................ 3.0 A

Direct Interelectrode Capacitances (approx)

Tetrode
Input ......................................... 12.2 pf
Output ........................................ 6.8 pf
Grid to Plate ................................. 0.2 pf

Maximum Ratings (Design Center Values)

Tetrode
Plate Voltage ................................. 1000 V
Grid No. 2 Voltage ............................ 250 V
Plate Dissipation ............................. 70 W
Grid No. 2 Dissipation ........................ 5 W

Characteristics and Typical Operation

Class C Amplifier
Plate Voltage ................................. 1000 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage ............................ -160 V
Plate Current ................................. 100 mA
Power Output (approx) ......................... 33 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage ............................ -180 V
Grid No. 1 Current ............................ 50 mA
Plate Current ................................. 100 mA
Power Output (approx) ......................... 50 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 15:25:43 -0700