NJ7P SQL Tube Database Query

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12AD7
Dual High-Mu Triode

EIA Base & Outline

EIA Base: 9AEIA Bulb: 6-2

Substitute Data

Preferred Substitutes ......................... 12AX7 12DF7
Substitutes ................................... 12BZ7

Mechanical Data

EIA Outline ................................... 6-2
EIA Base ...................................... 9A

Electrical Data

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

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 1.6 pf
Output ........................................ 0.5 pf
Grid to Plate ................................. 1.8 pf

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -2 V
Amplification Factor .......................... 100
Plate Resistance (approx) ..................... 62.5K Ω
Transconductance .............................. 1600 µMho
Plate Current ................................. 1.25 mA

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Thu, 20 Jan 2022 15:29:05 -0700