6K13P = 6BY7 = EF85 tube. Pentode
The 6K13P (6К13П) high-frequency pentode with an extended characteristic has been designed for use in wide-band h.f. voltage amplifiers with automatic gain control of electronic devices.
The 6K13P pentodes are miniature devices enclosed in glass bulb and are provided with a nine-pin base, rigit leads and an indirectly heated oxide-coated cathode.
The 6K13P tube pentodes are resistant to ambient temperature from -45 to +70°C and relative humidity of 95 to 98% at +25°C, as well as to vibration with an acceleration of (50Hz) 2 g.
All tubes new, military equipment and have "OTK" mark. Near equivalent: 6BY7 and EF85. The tube is manufactured by the Oktjbr', Vinnitsa, Ukraine.
Type: HF pentode
Application: application as wide-band HF voltage amplifier with automatic gain control
Cathode type: oxide,indirect heating
Mass, g: 18
Filament voltage, V: 6,3
Filament current, A: 0,275-0,325
Anode voltage, V: 200
Anode current, A: 0,009-0,015
Anode power, W: 2,5
Grid2 voltage, V: 90
Grid3 voltage, V: 0
Steepness, mA/V: 9,5-15,5
Reverse grid current, uA: 0,5
Microphnic noise, mV: 100
Socket type: rsh8
All datasheets here.