The 6S45PE is the translation for this Russian valve. It is a rugged triode designed for wideband amplification. The distributed cathode connection indicates a high frequency design application. The anode dissipation is 7.8 Watts. A low noise figure was obtained in these valves by operating at high current.
Looking into one channel anode. The lighter grey either side of the anode is the frame grid.
This image give a more accurate impression of the anode. The two sides are electrically one electrode.
The very fine wires of the frame grid and the flat surface of one anode.
The thin glass tube envelope is 22 mm in diameter, and excluding the B9A base pins is 47 mm tall.