NJ7P SQL Tube Database Query

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23Z9
Dual Triode - Beam Power Tube

EIA Base & Outline

Application

Duodecar type used in combined vertical-dflection oscillator and amplifier applications in tv receivers. Requires duodecar 12-contact socket.

Mechanical Data

EIA Base ...................................... 12GZ

Electrical Data

Heater Voltage ................................ 23 V
Heater Current ................................ 0.45 A

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 200 V
Plate Dissipation ............................. 7 W
Grid No. 2 Dissipation ........................ 1.8 W

Triode 1
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 1.25 W

Triode 2
Plate Voltage ................................. 250 V
Plate Dissipation ............................. 1 W

Characteristics and Typical Operation

Triode 1 Class A Amplifier
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ -2 V
Amplification Factor .......................... 43
Plate Resistance (approx) ..................... 11K Ω
Transconductance .............................. 3900 µ
Plate Current ................................. 5.4 mA

Triode 2 Class A Amplifier
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ -5 V
Amplification Factor .......................... 20
Plate Resistance (approx) ..................... 8.5K Ω
Transconductance .............................. 2350 µ
Plate Current ................................. 5.5 mA

Pentode Class A Amplifier
Plate Voltage ................................. 120 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage ............................ -8 V
Plate Resistance (approx) ..................... 11.7K Ω
Transconductance .............................. 7100 µ
Plate Current ................................. 46 mA
Grid No. 2 Current ............................ 3.5 mA

Vert Defl Amplifier
DC Plate Supply Voltage ....................... 250 V
Peak Positive-Pulse Plate Voltage ............. 2000 V
DC Grid No. 3 Voltage ......................... 200 V
DC Grid No. 2 Voltage ......................... -150 V
Peak Negative-Pulse Grid No. 1 Voltage ........ 70 V
Average Cathode Current ....................... 245 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

Fri, 24 Jun 2022 19:01:19 -0700