NJ7P SQL Tube Database Query

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12A6
Beam Power Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 12V6
Source ........................................ RCA DS 05/01/42

Application

Source ........................................ RCA DS 05/01/42
Metal type used as output amplifier in airborne equipment. Requires octal socket and may be mounted in any position.

Mechanical Data

Source ........................................ RCA DS 05/01/42
Bulb .......................................... MT-8
Base Type ..................................... Small Wafer Octal 7-Pin
EIA Outline ................................... 8-6
EIA Base ...................................... 7AC

Electrical Data

Source ........................................ RCA DS 05/01/42
Heater Voltage ................................ 12.6 V
Heater Current ................................ 0.15 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA DS 05/01/42
Input ......................................... 9 pf
Output ........................................ 9 pf
Grid to Plate ................................. 0.3 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA DS 05/01/42
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Plate Dissipation ............................. 7.5 W
Grid No. 2 Dissipation ........................ 1.5 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA DS 05/01/42
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -12.5 V
Peak Grid No. 1 Voltage........................ 12.5 V
Plate Resistance (approx) ..................... 70K Ω
Transconductance .............................. 3000 µ
Plate Current (Zero Signal) ................... 30 mA
Plate Current (Maximum Signal) ................ 32 mA
Grid No. 2 Current (Zero Signal) .............. 3.5 mA
Grid No. 2 Current (Maximum Signal) ........... 5.5 mA
Load Resistance ............................... 7.5K Ω
Power Output (approx) ......................... 3.4 W
Total Harmonic Distortion ..................... 7 %

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

Fri, 19 Aug 2022 21:54:36 -0700