High quality pentode tubes 6P14P-ER (6П14П-ER) designed for output stages of low frequency amplifiers. Direct replacement for the EL84 / 6BQ5. Tubes were measured on L3-3 tube tester with original 6P14P-EV/6P14P-ER card. Long life - E (minimum of 5000 operating hours) and extra high reliable - R tubes. New in box. Will be delivered with measured parameters attached. Year of production: 1990 (please look at the gallery pictures).