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.

89
Triple-Grid Power Amplifier

EIA Base & Outline

EIA Base: 6FEIA Bulb: 12-6
Source ........................................ RCA RC-13 - 1937

Application

Glass type used in output stage of radio receivers. Requires six-contact socket.

Mechanical Data

Bulb .......................................... ST-12
Base Type ..................................... Small 6-Pin
EIA Outline ................................... 12-6
EIA Base ...................................... 6F
Top Cap ....................................... Small Metal
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.4 A

Characteristics and Typical Operation

Class A Amplifier (Triode Connected)
Plate Voltage ................................. 160 V
Grid No. 1 Voltage ............................ -20 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 1180 Ω
Amplification Factor .......................... 4.7
Plate Resistance (approx) ..................... 3.3K Ω
Transconductance .............................. 1425 µMho
Plate Current ................................. 17 mA
Load Resistance ............................... 7K Ω
Power Output (approx) ......................... 0.3 W

Class A Amplifier (Triode Connected)
Plate Voltage ................................. 180 V
Grid No. 1 Voltage ............................ -22.5 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 1125 Ω
Amplification Factor .......................... 4.7
Plate Resistance (approx) ..................... 3K Ω
Transconductance .............................. 1550 µMho
Plate Current ................................. 20 mA
Load Resistance ............................... 6.5K Ω
Power Output (approx) ......................... 0.4 W

Class A Amplifier (Triode Connected)
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -31 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 970 Ω
Amplification Factor .......................... 4.7
Plate Resistance (approx) ..................... 2.6K Ω
Transconductance .............................. 1800 µMho
Plate Current ................................. 32 mA
Load Resistance ............................... 5.5K Ω
Power Output (approx) ......................... 0.9 W

Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -10 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 900 Ω
Amplification Factor .......................... 125
Plate Resistance (approx) ..................... 104K Ω
Transconductance .............................. 1200 µMho
Plate Current ................................. 9.5 mA
Grid No. 2 Current ............................ 1.6 mA
Load Resistance ............................... 10.7K Ω
Power Output (approx) ......................... 0.33 W
Total Harmonic Distortion ..................... 9 %

Class A Amplifier
Plate Voltage ................................. 135 V
Grid No. 2 Voltage ............................ 135 V
Grid No. 1 Voltage ............................ -13.5 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 830 Ω
Amplification Factor .......................... 125
Plate Resistance (approx) ..................... 92.5K Ω
Transconductance .............................. 1350 µMho
Plate Current ................................. 14 mA
Grid No. 2 Current ............................ 2.2 mA
Load Resistance ............................... 9.2K Ω
Power Output (approx) ......................... 0.75 W
Total Harmonic Distortion ..................... 9 %

Class A Amplifier
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 180 V
Grid No. 1 Voltage ............................ -18 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 785 Ω
Amplification Factor .......................... 125
Plate Resistance (approx) ..................... 80K Ω
Transconductance .............................. 1550 µMho
Plate Current ................................. 20 mA
Grid No. 2 Current ............................ 3.0 mA
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 1.5 W
Total Harmonic Distortion ..................... 9 %

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -25 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 670 Ω
Amplification Factor .......................... 125
Plate Resistance (approx) ..................... 70K Ω
Transconductance .............................. 1800 µMho
Plate Current ................................. 32 mA
Grid No. 2 Current ............................ 5.5 mA
Load Resistance ............................... 6750 Ω
Power Output (approx) ......................... 3.4 W
Total Harmonic Distortion ..................... 9 %

Push Pull Class B Amplifier (G1 & G2 G3 & P)
Plate Voltage ................................. 180 V
Grid No. 1 Voltage ............................ 0 V
Peak Grid No. 1 Voltage........................ 68 V
Plate Current (Zero Signal) ................... 6 mA
Plate Current (Maximum Signal) ................ 90 mA
Load Resistance ............................... 9.4K Ω
Power Output (approx) ......................... 3.5 W

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

Mon, 28 Nov 2022 00:28:35 -0700