NJ7P SQL Tube Database Query

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6CA11
Dissimiliar Dual Triode - Pentode

EIA Base & Outline

Mechanical Data

Source ........................................ GE DS 10/68
Bulb .......................................... T-9
Base Type ..................................... E12-70 Button 12-Pin
EIA Outline ................................... 9-58
EIA Base ...................................... 12HN
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ GE DS 10/68
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.02 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode
DC Component ............................ 100 V
Total DC and Peak ....................... 200 V
Heater Negative with Respect to Cathode
DC Component ............................ 200 V
Total DC and Peak ....................... 200 V

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ GE DS 10/68
Input ......................................... 12.3 pf
Output ........................................ 4.6 pf
Grid to Plate ................................. 0.13 pf

Triode 1
Source ........................................ GE DS 10/68
Input ......................................... 4.7 pf
Output ........................................ 4.0 pf
Grid to Plate ................................. 2.7 pf

Triode 2
Source ........................................ GE DS 10/68
Input ......................................... 2.8 pf
Output ........................................ 2.0 pf
Grid to Plate ................................. 2.1 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ GE DS 10/68
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 5.0 W
Grid No. 2 Dissipation ........................ 1.0 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 50K Ω
Self Bias .................................. 100K Ω

Each Triode
Source ........................................ GE DS 10/68
Plate Voltage ................................. 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 1.5 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 500K Ω
Self Bias .................................. 1M Ω

Characteristics and Typical Operation

Pentode Class A Amplifier
Source ........................................ GE DS 10/68
Plate Voltage ................................. 200 V
Grid No. 2 Voltage ............................ 120 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 65 Ω
Plate Resistance (approx) ..................... 490K Ω
Transconductance .............................. 21200 µ
Plate Current ................................. 27.5 mA
Grid No. 2 Current ............................ 4.9 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -5.0 V

Triode 1 Class A Amplifier
Source ........................................ GE DS 10/68
Plate Voltage ................................. 200 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 270 Ω
Amplification Factor .......................... 59
Plate Resistance (approx) ..................... 9200 Ω
Transconductance .............................. 6300 µ
Plate Current ................................. 7.6 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -6.3 V

Triode 2 Class A Amplifier
Source ........................................ GE DS 10/68
Plate Voltage ................................. 200 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 270 Ω
Amplification Factor .......................... 69
Plate Resistance (approx) ..................... 12400 Ω
Transconductance .............................. 5500 µ
Plate Current ................................. 7.1 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -5.5 V

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 22:26:26 -0700