NJ7P SQL Tube Database Query

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12U7
Medium-Mu Twin Triode

EIA Base & Outline

Substitute Data

Substitutes ................................... 12AE7
Source ........................................ RCA RC-27 - 1973

Application

Miniature type used as a general purpose amplifier. This tube is designed to operate where heater and plate voltage ar supplied directly from a 12 volt battery. Requires miniature 9-contact socket.

Mechanical Data

Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
EIA Outline ................................... 6-2
EIA Base ...................................... 9A
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 12.6 V
Heater Current ................................ 0.15 A

Direct Interelectrode Capacitances (approx)

Each Triode
Input ......................................... 1.6 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 1.5 pf

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 12.6 V
Grid No. 1 Voltage ............................ 0 V
Amplification Factor .......................... 20
Plate Resistance (approx) ..................... 12.5K Ω
Transconductance .............................. 1600 µ
Plate Current ................................. 1 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

Thu, 02 Feb 2023 23:21:00 -0700