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23 August 2017 


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6AU5GT Beam Pentode

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General Information

The 6AU5 GT is a beam power amplifier designed for use as a horizontal deflection amplifier.

Characteristics

Cathode indirectly heated oxide coated
     
Heater Voltage 6.3 V
Heater current 1.25 A

Inter-Electrode Capacities

Grid 1 Anode 0.5   pF
Grid 1 – Cathode, Grid 3, Grid 2 & heater 11.3 pF  
Anode – Cathode, Grid 3, Grid 2 & heater  7.0 pF  

Maximum Ratings

Maximum anode voltage 550 V
Absolute Maximum Peak Positive - pulse anode voltage 5500 V
Maximum Peak Negative - pulse anode voltage -1250 V
Maximum Screen (Grid 2) Voltage  200 V
Maximum Peak Negative - pulse Control Grid voltage -300 V
Maximum Peak Cathode Current   400 mA
Maximum Average Cathode Current           110 mA
Maximum anode dissipation 10 W
Maximum Screen (Grid 2) dissipation 2.5 W
Maximum Peak Heater- Cathode Voltage    
Heater Negative with respect to Cathode 200 V
Heater Positive with respect to Cathode 200 V

Dimensions

Maximum height 84mm
Seated height 70mm
Diameter 33mm

BASE - International Octal 8 pin

Base Connections

Pin 1          Grid
Pin 2          Heater
Pin 3          Cathode/grid
Pin 4          No Pin
Pin 5          Anode
Pin6          No Pin
Pin 7         Heater
Pin 8         Grid 2

6AU5GT mounting position diagram

Typical Operating Conditions

Pentode Operation  –  (Eb = 115V, Ec2 = 175V and Ec1 = -20V )

Anode Current 60 mA
Grid 2 Current 6.8 mA
Transconductance 5600 µmhos
Anode resistance 6000 Ω
     

Zero Bias: ((Eb = 60V, Ec2 = 175V  )

  210 mA
  25 mA
     

Cut-Off: ( Ib =1 mA with Eb =115V and Ec2 = 150 V )

   
Grid 1 (Control Grid) Voltage (Approx.) -45 V
     
Triode Amplification Factor ( Eb =100V and Ec1 = -4.5V) 5.9  

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6AU5GT pentode connection graph 1
6AU5GT pentode connection graph 2

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