NJ7P SQL Tube Database Query

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6EJ4A
Beam Triode

EIA Base & Outline

EIA Base: 12HCEIA Bulb: 12-118

Substitute Data

Preferred Substitutes ......................... 6EJ4
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 ...................................... 12HC
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 ......................................... 2.0 pf
Output ........................................ 0.8 pf
Grid to Plate ................................. 0.03 pf

Maximum Ratings (Design Center Values)

Beam Triode
Source ........................................ GE DS 12/70
Plate Voltage ................................. 27000 V
Negative Grid No. 1 Voltage ................... -440 V
Plate Dissipation ............................. 40 W
Plate Current ................................. 1.5 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 3M Ω
Self Bias .................................. 3M Ω

Characteristics and Typical Operation

Shunt TV HV Regulator
Source ........................................ GE DS 12/70
Plate Current ................................. 1.6 mA

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(c) 1994-2021 by William A. Beech, NJ7P

Thu, 11 Aug 2022 14:34:10 -0700