NJ7P SQL Tube Database Query

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21LG6A
Beam Power Tube

EIA Base & Outline

Application

Duodecar type used as horizontal-deflection amplifier in color tv rceivers. Requires duodecar 12-contact socket.

Mechanical Data

EIA Base ...................................... 12HL

Electrical Data

Heater Voltage ................................ 21 V
Heater Current ................................ 0.6 A

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 900 V
Grid No. 2 Voltage ............................ 250 V
Plate Dissipation ............................. 28 W
Grid No. 2 Dissipation ........................ 5 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 175 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -23 V
Plate Resistance (approx) ..................... 7.5K Ω
Transconductance .............................. 11500 µ
Plate Current ................................. 90 mA
Grid No. 2 Current ............................ 1.7 mA

Hortz Defl Amplifier
DC Plate Supply Voltage ....................... 900 V
Peak Positive-Pulse Plate Voltage ............. 7500 V
Peak Negative-Pulse Plate Voltage ............. -100 V
DC Grid No. 3 Voltage ......................... 250 V
DC Grid No. 2 Voltage ......................... -300 V
Peak Negative-Pulse Grid No. 1 Voltage ........ 315 V
Average Cathode Current ....................... 1100 mA

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, 25 Jun 2022 10:16:32 -0700