NJ7P SQL Tube Database Query

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33GY7A
Diode - Beam Power Tube

EIA Base & Outline

Application

Duodecar type used in tv receiver applications. The diode is used for damper service and the beam power unit for horizontal-deflection amplifier service. Requires duodecar 12-contact socket.

Mechanical Data

EIA Base ...................................... 12FN

Electrical Data

Heater Voltage ................................ 33.6 V
Heater Current ................................ 0.45 A

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 150 V
Plate Dissipation ............................. 9 W
Grid No. 2 Dissipation ........................ 3 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 130 V
Grid No. 2 Voltage ............................ 130 V
Grid No. 1 Voltage ............................ -22.5 V
Plate Resistance (approx) ..................... 10K Ω
Transconductance .............................. 6500 µ
Plate Current ................................. 48 mA
Grid No. 2 Current ............................ 2.9 mA

Hortz Defl Amplifier
DC Plate Supply Voltage ....................... 500 V
Peak Positive-Pulse Plate Voltage ............. 5000 V
Peak Negative-Pulse Plate Voltage ............. 0 V
DC Grid No. 3 Voltage ......................... 150 V
DC Grid No. 2 Voltage ......................... -330 V
Peak Negative-Pulse Grid No. 1 Voltage ........ 155 V
Average Cathode Current ....................... 540 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

Wed, 29 Mar 2023 00:29:09 -0700