Main technical characteristics:
Filament current 310 mA
Anode current 15 mA
The same at the beginning of the characteristic (at Uс = -8 V), no more than 0.1 mA
Reverse grid current, no more than 0.2 µA
Leakage current between cathode and heater, no more than 15 μA
Characteristic slope, 10-12.7 mA/V
The same at Un = 5.7 V, more than 8.5 mA/V
Gain 34
Input impedance (at F = 200 MHz), 500 Ohm
Equivalent noise impedance, 300 ohms
Vibration noise voltage (at Ra = 2 kOhm), no more than 150 mV
Interelectrode capacitances,
input 3.6 pF
output of the first triode 2.1 pF
output of the second triode 1.95 pF
pass capacitance 1.55 pF
between the cathode and anode of each triode no more than 0.24 pF
between triode anodes no more than 0.09 pF
between triode grids no more than 0.005 pF
Durability with 90% service life, more than 5000 hours
Durability criterion:
reverse grid current, no more than 1 µA
characteristic slope, more than 8.5 mA/V