6K4P 6К4П 6 pcs (6BA6, EF93)USSR HF PENTODE Vacuum tubes for sale Fonon

Description

6K4P 6К4П 6pcs (6BA6, EF93) USSR HF PENTODE Fonon Rare
Vacuum tubes
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6К4П:
Filament voltage 6.3 V
The anode voltage of 250V
Second grid voltage 100V
Filament current 300±30mA 300±25mA
Anode current 10±3mA
Second grid current <5.5 mA
The steepness of the characteristics 4.4±0.9 mA/V
The steepness of the characteristics at UN=5,7 V
>2.8 mA/V >3.0 mA/V
The steepness at the beginning of the characteristic (Uc1=-20V) 0.04 mA/V
First grid reverse current <1.0 µa <0.3 µa
The cut-off voltage of the electronic current of the first mesh < -1.5 V
Resistance in the cathode circuit for automatic displacement of 68 ohms
Internal resistance of about 850Ком about 450Ком
Input impedance (at f=60MHz) type. 19kom     >2kom
(type. 5kω)
Voltage fibrosum (Ra=10kOhm) <400mV <180мВ
Input capacitance 6pf 6.4±0.8 pF
The output capacitance of 6.3 pF 6,7±1,1 pF
Internal capacitance <0,0045 pF Capacitance cathode-heater is a 5.5 pF to 5.5 pF
Operating time 1000h 5000h