Electron tube SG15P-2 (СГ15П-2) is a soviet voltage regulator. Stabilized voltage in the operating current range: 106±4V. Operating current: 5-30mA. SG15P-2 is direct replacement for the similar type OB2. Pinout is the same, technical parameters are close to identical, minimum striking voltage of SG15P-2 is 160V, dimensions are close to the OB2 from Philips. Service life guarantee: not less than 15 000 operating hours. Original enclosed datasheet is available for download. New old stock tubes, directly from the factory packing. Made in the 80's and 90's.