NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

12BZ7
High-Mu Twin Triode

EIA Base & Outline

EIA Base: 9AEIA Bulb: 6-2

Substitute Data

Substitutes ................................... 12AX7 12AY7 12DW7
Source ........................................ Sylvania - 1959

Application

Source ........................................ Sylvania - 1959
Miniature type used as a sync-separator and sync amplifier in tv receivers. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ Sylvania - 1959
Bulb .......................................... T-6 1/2
Base Type ..................................... Small Button 9-Pin
EIA Outline ................................... 6-3
EIA Base ...................................... 9A
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ Sylvania - 1959
Heater Voltage ................................ 6.3/12.6 V
Heater Current ................................ 0.6/0.3 A

Direct Interelectrode Capacitances (approx)

Triode 1
Source ........................................ Sylvania - 1959
Input ......................................... 6.5 pf
Output ........................................ 0.7 pf
Grid to Plate ................................. 2.5 pf

Triode 2
Source ........................................ Sylvania - 1959
Input ......................................... 6.5 pf
Output ........................................ 0.55 pf
Grid to Plate ................................. 2.5 pf

Maximum Ratings (Design Center Values)

Triode 1
Source ........................................ Sylvania - 1959
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 1.5 W

Triode 2
Source ........................................ Sylvania - 1959
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 1.5 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ Sylvania - 1959
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -2 V
Amplification Factor .......................... 100
Plate Resistance (approx) ..................... 31.8K Ω
Transconductance .............................. 3200 µMho
Plate Current ................................. 2.5 mA

A horizontal ribbon.

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A horizontal ribbon.

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Mon, 05 Dec 2022 01:13:09 -0700