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ECC82[Under Construction]








ECC82 is A.F. Double Triode


download data sheet

Quick reference data

  •     Anode current Ia=10,5mA

  •     Transcoductance S=2,2mA/V

  •     Amplification m=17


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


Note: With Vf applied to pins 4+5 and 9, and center tap of the heater transformer connected to the ground, the more favourable triode section of the tube (regarding to hum) is the section connected to pins 6, 7, and 8.

Typical characteristics and operating conditions

Anode voltage Va 100 250 (V)
Grid voltage Vg 0 -8,5 (V)
Anode current Ia 11,8 10,5 (mA)
Transconductance S 3,1 2,2 (mA/V)
Amplification m 19,5 17  
Internal resistance Ri 6,25 7,7 (kW)

Limiting - maximal values (design center rating system)

Anode voltage Vao 550 (V)
Va 300
Anode dissipation Wa 2,75 (W)
Cathode current Ik 20 (mA)
Grid voltage Vg -100 (V)
Grid voltage, peak Vgp -250 (V)
Grid resistor
(automatic bias)
Rg 1 (MW)
Cathode to heater voltage Vkf 180 (V)
Cathode to heater circuit resistance in phase splitting circuits Rkf 150 (kW)

Application note:

This tube can be used without precautions against microphony in equipment which is characterized by Vi >= 10mV for an output of 50mW of the output tube (or Vi>=100mV for 5W output), provided that average acceleration of the tube is not greater than indicated in the Section "Microphonic effect"  from the "Application directions". When the center tap of the heater transformer is grounded, Rg=<0,3MW and Rk is sufficiently decoupled, and the disturbance level from hum and noise will be better than 60dB bellow 100mV.


See some graphs ...


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Copyright 2002 Ei Elektronske Cevi DOO
Last modified: 26.01.2003