6K4 = 6SG7 NEVZ Russian HF Pentode Vacuum Tube USSR 4pcs NEW all-1971 TESTED

Tubes never used, old stock, made at Factory NEVZ in USSR
Equivalent to the 6SG7
Date: all-1971
Lot of 4 tubes. TESTED

REAL PHOTO!

Name 6K4
Type HF pentode
Application HF voltage amplification
Cathode type oxide,indirect heating
Envelope metal
Mass,g45
Filament voltage,V 6,3
Filament current,A 0,275-0,325
Anode voltage,V 250
Anode current,A 0,009-0,015
Anode power,W 3,3
Grid1 voltage,V minus 1
Grid2 voltage,V 125
Steepness,mA/V 3,8-5,6
Microphnic noise,mV 400
Socket type rsh5-1

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