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30 November 2021 

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EC92/6AB4 Miniature Triode

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General Information

EC92/6AB4 is an indirectly heated high frequency miniature triode designed for use as an Oscillator, Class A Amplifier or Frequency Converter.


Cathode Oxide coated unipotential  
Heater Voltage 6.3 V  
Heater current 150 mA  
Anode Current 10 mA  
Amplification Factor 60 µ  
Transconductance 5.5 mA/V  

Typical Operating Conditions

Anode Voltage 100 170 200 250 V
Grid Voltage -1.0 -1.0 -1.0 -2.0 V
Anode Current 3.0 8.5 11.5 10 mA
Transconductance 3.75 5.9 6.7 5.5 mA/V
Amplification Factor 62 66 70 60  
Internal Resistance 16.500 11000 10.500 11000 Ω

Maximum Ratings

Maximum anode voltage Vao 550 V
  Va 300 V
Maximum  Anode Dissipation Wa 2.5 W
Maximum Cathode Current Ik 15 mA
Maximum Grid Voltage -Vg 50 V
Maximum Grid Resistance      
(Automatic Bias) Rg 1.0
Maximum Cathode to Heater Voltage Vkf 100 V

Inter-electrode Capacitances

  With screen Without screen  
Grid to anode 1.5 1.5 pF
Input - Grid to (cathode & heater) 2.2 2.2 pF
Output - Grid to (cathode & heater) 1.4 0.5 pF
Heater to Cathode 2.9 2.9 pF
Anode to Cathode 0.20 0.24 pF

Grounded grid Input

Cathode to (heater & grid) 5.2 5.0 pF

Grounded Grid Output

Anode to (heater & grid) 2.6 1.7 pF


Maximum overall height 54mm
Maximum seated height 42.6mm
Maximum diameter 19mm

Mounting Position - Any

EF95/6AK5/5654 Miniature Pentode mounting position diagram

BASE - Miniature B7G


Pin 1          Anode
Pin 2          No Connection
Pin 3          Heaters
Pin 4          Heaters
Pin 5          No Connection
Pin 6          Grid
Pin 7          Cathode

Anode Characteristics

EC92/6AB4 Miniature Triode Anode Characteristics Diagramme 1

EC92/6AB4 Miniature Triode Anode Characteristics Diagramme 2

Transfer Characteristics

EC92/6AB4 Miniature Triode Transfer Characteristics Diagramme

Average Characteristics

EC92/6AB4 Miniature Triode Average Characteristics Diagramme

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