NJ7P SQL Tube Database Query

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6BK4
Beam Triode

EIA Base & Outline

EIA Base: 8GCEIA Bulb: 12-21 12-36

Substitute Data

Preferred Substitutes ......................... 6BD4A
Source ........................................ TungSol DS 09/01/62

Application

Source ........................................ TungSol DS 09/01/62
Glass octal type used for the voltage regulation of high-voltage, low-current dc power supplies in color and black-and-white television receivers. Requires octal socket. Socket terminals 3, 4, 6 and 8 should not be used for tie points.

Mechanical Data

Source ........................................ TungSol DS 09/01/62
Bulb .......................................... T-12
Base Type ..................................... B8-71 or B8-118
EIA Outline ................................... 12-21 12-36
EIA Base ...................................... 8GC
Top Cap ....................................... Small
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ TungSol DS 09/01/62
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.2 A
Maximum Heater-Cathode Voltage
Heater Negative with Respect to Cathode
Total DC and Peak ....................... 220 V

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ TungSol DS 09/01/62
Input ......................................... 2.6 pf
Output ........................................ 1 pf
Grid to Plate ................................. 0.03 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ TungSol DS 09/01/62
Plate Voltage (Absolute Max) .................. 27000 V
Negative DC Grid No. 1 Voltage ................ 135 V
Peak Negative Grid No. 1 Voltage .............. 440 V
Plate Dissipation (Absolute Max) .............. 25 W
DC Plate Current (Absolute Max) ............... 1.6 mA
Grid No. 1 Circuit Resistance ................. 3M Ω

Characteristics and Typical Operation

Shunt Regulator
Source ........................................ TungSol DS 09/01/62
Unregulated DC Supply Voltage ................. 36000 V
Equivalent Resistance of Unregulated Supply ... 11M Ω
DC Reference Voltage .......................... 200 V
Equivalent Resistance of Reference Supply ..... 1K Ω
Effective Grid-Plate Transconductance ......... 200 µMho
DC Plate Current for Zero Load Current ........ 1000 µa
DC Plate Current for Load Current of 1 mA ..... 45 µa
Regulated DC Output Voltage (0 mA Load) ....... 25000 V
Regulated DC Output Voltage (1 mA Load) ....... 24500 V

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Fri, 19 Aug 2022 21:55:20 -0700