NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

12AL8
Medium-Mu Triode - Power Tetrode

EIA Base & Outline

EIA Base: 9GSEIA Bulb: 6-3
Source ........................................ RCA RC-27 - 1973

Application

Source ........................................ RCA RC-27 - 1973
Miniature type used as a audio amplifier and driver tube. This tube is designed to operate where heater and plate voltage ar supplied directly from a 12 volt battery. Requires miniature 7-contact socket.

Mechanical Data

Source ........................................ RCA RC-27 - 1973
Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
EIA Outline ................................... 6-3
EIA Base ...................................... 9GS
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-27 - 1973
Heater Voltage ................................ 12.6 V
Heater Current ................................ 0.55 A

Direct Interelectrode Capacitances (approx)

Tetrode
Source ........................................ RCA RC-27 - 1973
Input ......................................... 8 pf
Output ........................................ 1.1 pf
Grid to Plate ................................. 0.7 pf

Triode
Source ........................................ RCA RC-27 - 1973
Input ......................................... 1.5 pf
Output ........................................ 0.3 pf
Grid to Plate ................................. 12 pf

Maximum Ratings (Design Center Values)

Tetrode
Source ........................................ RCA RC-27 - 1973
Plate Voltage ................................. 30 V
Grid No. 2 Voltage ............................ 16 V

Triode
Source ........................................ RCA RC-27 - 1973
Plate Voltage ................................. 30 V

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ RCA RC-27 - 1973
Plate Voltage ................................. 12.6 V
Grid No. 1 Voltage ............................ -0.9 V
Amplification Factor .......................... 15
Plate Resistance (approx) ..................... 27K Ω
Transconductance .............................. 550 µMho
Plate Current ................................. 0.25 mA

Tetrode Class A Amplifier
Source ........................................ RCA RC-27 - 1973
Plate Voltage ................................. 12.6 V
Grid No. 2 Voltage ............................ 12.6 V
Grid No. 1 Voltage ............................ -0.8 V
Plate Resistance (approx) ..................... 1K Ω
Transconductance .............................. 8000 µMho
Plate Current ................................. 25 mA
Grid No. 2 Current ............................ 50 mA

A horizontal ribbon.

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A horizontal ribbon.

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Thu, 30 Jun 2022 15:57:10 -0700