pentode 4P1S - (NOS)
Chinese electron tube 4P1S is directly heated pentode and direct replacement for the russian 4P1L (4П1Л). New old stock tubes in original white boxes. Datasheet (in english) included. Made in China - Peking (Beijing) Electron Tube Factory in early 60's.
(we reserve the right to change the description and specifications without prior notice)