4 X 6P1P-EV  (6П1П-ЕВ) El90, 6AQ5 - equivalent but with different base and pinout. 

Same Date Vacuum Tubes. 

NOS.

Made in the USSR in 70s at the Svetlana factory.

Tubes are new, newer used and tested with L3-3 tester.

Ye (Russian: Е) – Extended service life (till 10 000 h)
  • V (Russian: В) – Increased reliability and mechanical ruggedness (such as low susceptibility to noise and microphonics).


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