NJ7P SQL Tube Database Query

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6EH4A
Beam Triode

EIA Base & Outline

EIA Base: 12FAEIA Bulb: 12-118

Substitute Data

Preferred Substitutes ......................... 6EA4
Source ........................................ GE DS 12/70

Application

Source ........................................ GE DS 12/70
Duodecar type used as a shunt regulator in the high-voltage power supply of color television receivers. Requires duodecar 12-contact socket. Thus type is electrically identically with 6EJ4A.

Mechanical Data

Source ........................................ GE DS 12/70
Bulb .......................................... T-12
Base Type ..................................... E12-74 Button 12-Pin
EIA Outline ................................... 12-118
EIA Base ...................................... 12FA
Top Cap ....................................... C1-50 Small
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ GE DS 12/70
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.2 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode
DC Component ............................ Not Recommended V
Heater Negative with Respect to Cathode
DC Component ............................ 450 V

Direct Interelectrode Capacitances (approx)

Beam Triode
Source ........................................ GE DS 12/70
Input ......................................... 1.9 pf
Output ........................................ 0.63 pf
Grid to Plate ................................. 0.036 pf

Maximum Ratings (Design Center Values)

Beam Triode
Source ........................................ GE DS 12/70
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) .............. 40 W
DC Plate Current (Absolute Max) ............... 1.5 mA
Grid No. 1 Circuit Resistance ................. 3M Ω
Bulb Temperature at Hottest Point ............. °C

Characteristics and Typical Operation

Shunt TV HV Regulator
Source ........................................ GE DS 12/70
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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Sat, 26 Nov 2022 02:40:28 -0700