The 6P6S (6П6С) output beam tetrode was designed for amlification of low frequency power. na použitie v koncových stupňoch nf zosilňovačov. It is direct replacement for the 6V6GT or 6V6 from the former DDR. It replaces also the chinese 6P6P normally (without any mechanical adjustments). All of the available tubes are tested and in original boxes. Boxes may wear some longer storage marks. Produced in the 80's by Reflaktor, Saratov.