Russian 6P3S (6П3С) tetrode is used in output stages of low frequency amplifiers. It is russian variant of electron tube 6L6GB. It may be used instead of tubes 6L6G, 6L6GA and 6L6GB. Maximum anode voltage is 400V, maximum voltage of the second grid is 300V. Tubes were tested with the L3-3 tube tester and will be delivered in modern brown boxes. New old stock. Manufacturer: Reflector (Saratov). Year of production: 1973.