NJ7P SQL Tube Database Query

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A horizontal ribbon.

12AT7
High-Mu Twin Triode

EIA Base & Outline

EIA Base: 9AEIA Bulb: 6-2

Substitute Data

Preferred Substitutes ......................... 12AZ7
Substitutes ................................... 12FV7
Source ........................................ RCA RC-29 - 1975

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used as push-pull cathode-drive amplifiers or frequency converters in FM and tv broadcast bands. Requires miniature 9-contacts socket.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-6 1/2
Base Type ..................................... Small Button 9-Pin
EIA Outline ................................... 6-2
EIA Base ...................................... 9A
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3/12.6 V
Heater Current ................................ 0.3/0.15 A

Direct Interelectrode Capacitances (approx)

Each Triode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 2.2 pf
Output ........................................ 0.5 pf
Grid to Plate ................................. 1.5 pf

Maximum Ratings (Design Center Values)

Each Triode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 2.5 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 100 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 270 Ω
Amplification Factor .......................... 60
Plate Resistance (approx) ..................... 15K Ω
Transconductance .............................. 4000 µMho
Plate Current ................................. 3.7 mA

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 250 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 200 Ω
Amplification Factor .......................... 60
Plate Resistance (approx) ..................... 10/9K Ω
Transconductance .............................. 5500 µMho
Plate Current ................................. 10 mA

A horizontal ribbon.

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A horizontal ribbon.

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Sat, 25 Mar 2023 20:21:23 -0700