6N28B-V Russian Double Triode Tubes Lot of 10 pcs.

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6N28B-V Russian Double Triode Tubes Lot of 10 Type Double triode,shock-proof,hi-durable Application LF voltage amplification,HF oscillation Cathode type oxide,indirect heating Filament voltage,V 6,3 Filament current,A 0,225-0,27 Anode voltage,V50 Anode current,A 0,004-0,01 Grid1 voltage,V minus 1 Steepness,mA/V 4,5-9,0 Reverse grid current,uA 0,1 Microphnic noise,mV 10 Socket type flexible Manufactured in 1990