Matched Pair 6n8s = 1578 = 6sn7 = Top Russian Tubes Foton Nos Otk 60s!

US $29.99

  • East Europe, Ukraine
  • Jan 29th
RARE 6N8S = 1578 = 6SN7 Double triode tubes. MATCHED PAIR! MATCHED PAIR! Tested on L3-3 tube tester (Un=6.3V, Uc1= -8V, Ua=250V, Uc2= 250V) Tube # Date Ia1 S1 Ia2 S2 25 Mar-65 9.4 2.5 7.0 2.2 53 Jan-64 9.4 2.6 6.6 2.2 were 100% is: Ia = 9mA, S = 2.6 mA/V 6N8S double triode is designed for amplification of low-frequency voltage. The 6N8S double triodes are enclosed in glass bulb and are privided with an octal base and an indirectly heated oxide-coated cathode. The 6N8S double triodes are resistant to ambient temperature from -60 to +70 C and relative humidity of 95 to 98% at +20 C, as well as to vibration with an acceleration of 1.5 g. Service life guarantee: 2000hr. Tubes which were made at Foton military factory (Tashkent city) in exUSSR in 60s are direct replacement of 6SN7, 1578 (very close to legendary 1578 Tubes with metal base) . Note: only 6N8S tubes with big black getter and some design features (view additional photos) made on "Foton" factory  are close to 1578 Tubes! Name 6N8S Type Double triode Application LF voltage amplification Cathode type oxide,indirect heating Envelope glass Mass,g 37 Filament voltage,V 6,3 Filament current,A 0,55-0,65 Anode voltage,V 250 Anode current,A 0,0055-0,0115 Anode power,W 2,75 Grid1 voltage,V minus 8 Steepness,mA/V 2,1-3,1 Reverse grid current,uA 2 Microphnic noise,mV 150 Gain 18,0-23,0 Socket type rsh5-1 Payment  Please note that we accept PayPal-payments only! Shipping - International AirMail shipping from Ukraine takes 12-21 days all over the world. - Shipping will be combined for multiple wins. Save on shipment!

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