NJ7P SQL Tube Database Query

A horizontal ribbon.

Note: Please do not link down into my pages. I change this directory structure often and your links will not work correctly.

A horizontal ribbon.

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

A horizontal ribbon.

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.

Please enter the tube number:

This database contains data on thousands of tubes. Every effort has been made to insure the accuracy of this reference, however, I assume no liability for the results of using information contained herein.

Other Tube Search Engines:
Frank's Electron Tube Pages

Complete Tube Manuals:
Tube Manual Index from NJ7P

A horizontal ribbon.

(c) 1994-2021 by William A. Beech, NJ7P

Wed, 29 Mar 2023 03:41:16 -0700