Quality vintage soviet ceramic tube sockets PL7-1KD-38 (ПЛ7-1КД-38) for miniature 7-pin tubes. Sockets are equipped with removable steel retainer. It is suitable for tubes like 6J3P (6Ж3П) etc. After a very easy removal of the retainer they may be used for all heptal tube types. New old stock. Year of production: 1987.