Old and quality metal-ceramic tube sockets PLK9-E75 (ПЛК9-Э75) for miniture 9-pin based tubes of general height approximately 75 mm (measured from the bottom of the pins to the tip of the glass envelope). Sockets are equipped with aluminium shield with spring inside. Designed for tubes like EL84/6BQ5/6P14P (6П14П), EL83/EL803S, 6P15P (6П15П), 6N30P-DR (6H30П-ДР) and many other tubes of similar height. Without the aluminium shield it may be used for all noval (miniature 9-pin, B9A) tube types. New old stock, directly from the factory packing. Years of production: 1976 a 1977.