6P15P-ER (6П15П-ЕР) pentodes for output stages of high frequency amplifiers. Although this tube is often described as a russian equivalent of the EL83 tubes, it has a different pinout, so you have to be carefull. 6P15P-ER is a direct replacement for the SV83 from the Svetlana Electron Devices. Tubes are tested and measured with the L3-3 tester, matched in pairs. Service life guarantee: not less than 5000 operating hours (-E). Considerably increased mechanical strength and reliability (-R). New in box. Made in the 80's.