Vintage soviet metal-ceramic tube sockets PL9-2K-E55 (ПЛ9-2К-Э55) for miniature 9-pin tubes. Sockets are equipped with aluminium shield (H = 55 mm). It is suitable for tubes like 6N1P (6H1П), 6N2P (6H2П), 6N3P (6H3П), 6N23P (6H23П), E88CC/6922, E83CC/12AX7, ECC82/12AU7 and many others. Without the aluminium shield it may be used for all noval (9-pin, B9A) tube types. New old stock.