NJ7P SQL Tube Database Query

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12AV7
Medium-Mu Twin Triode

EIA Base & Outline

Substitute Data

Substitutes ................................... 12FV7 12DW7 12AZ7

Mechanical Data

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

Electrical Data

Heater Voltage ................................ 6.3/12.6 V
Heater Current ................................ 0.45/0.225 A

Direct Interelectrode Capacitances (approx)

Each Triode
Input ......................................... 3.1 pf
Output ........................................ 0.5 pf
Grid to Plate ................................. 1.9 pf

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 120 Ω
Amplification Factor .......................... 37
Plate Resistance (approx) ..................... 6.1K Ω
Transconductance .............................. 6100 µ
Plate Current ................................. 9 mA

Class A Amplifier
Plate Voltage ................................. 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 56 Ω
Amplification Factor .......................... 41
Plate Resistance (approx) ..................... 4.8K Ω
Transconductance .............................. 8500 µ
Plate Current ................................. 18 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

Tue, 31 Jan 2023 10:57:33 -0700