Double triode for high frequency voltage amplification and generation in television receivers and other radio devices. Design - in a glass shell, miniature. Weight 14 g.

Basic parameters at Un = 6.3 V, Ua = 250 V, Rk = 230 Ohm (or Uc = -2.3 V) ECC85

Filament current - 380 mA

Anode current - 10 mA

Slope - 6 mA/V

Gain — 57 —

Interelectrode capacitance grid-cathode 3 pF

mesh anode 1.5

anode-cathode 0.18

between anodes of triodes ≤0.04

ECC85 performance limits

Heating voltage - 5.7-6.9 V

Anode voltage - 300 V

when lamp 550 is turned on

Voltage between the cathode and the heater - 90 V

Grid voltage, negative - 100 V

Cathode current - 15 mA

Power dissipated by the anode of each triode - 2.5 W

Total power dissipated by the anodes of two triodes - 4.5 W

Resistance in the grid circuit - 1 MΩ

Lamp bulb temperature - 200 ºС