6P14P-K (6П14П-К) pentode was designed for output stages of low frequency amplifiers. It is direct replacement for the EL84 and 6BQ5 tubes. Tested on the L3-3 tube tester (labels with measured parameters Ia + S included). Minimum service life is 3000 operating hours. Vibration proof version (-K) of the 6P14P tube. NOS tubes made in the early 70's.