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ECC81

 

 

 

 

 

 

 

ECC81 is R.F. Double Triode

 

 

Quick reference data

  •     Anode current Ia=10mA

  •     Transcoductance S=5,5mA/V

  •     Amplification m=60

Heating

Heating is indirect by AC or DC, with serial or parallel supply. Please note that, in case of serial supply, a current limiting device must be inserted in the heater circuit for limiting the current when switching on. 

Heater voltage  Vf  6,3 12,6 (V)
Heater current  If  300 150 (mA)
pins   9-(4+5) 4-5  

Dimensions and connections

Base: Noval

 

 

Typical characteristics and operating conditions

Anode voltage Va 100 170 200 250 (V)
Grid voltage Vg -1,0 -1,0 -1,0 -2,0 (V)
Anode current Ia 3,0 8,5 11,5 10 (mA)
Transconductance S 3,75 5,9 6,7 5,5 (mA/V)
Amplification m 62 66 70 60  
Internal resistance Ri 16,5 11 10,5 11 (kW)

Limiting - maximal values (design center rating system)

Anode voltage Vao 550 (V)
Va 300
Anode dissipation Wa 2,5 (W)
Cathode current Ik 15 (mA)
Grid voltage Vg -50 (V)
Grid resistor
(automatic bias)
Rg 1 (MW)
Cathode to heater voltage Vkf 90 (V)

 

See some graphs ...


 

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Copyright 2002 Ei Elektronske Cevi DOO
Last modified: 26.01.2003