+ 12 pcs. in LOT X 6N1P-EV VINTAGE USSR TUBES~ 6BQ7A ~ ECC85

6N1P-EV (Russian 6Н1П-ЕВ) a-g 6BQ7A (ECC85) vintage triode tube from USSR 12 pcs. in Lot Vintage USSR audiophile high-quality double triode 6N1P-EV. High reliability, long life non less 5000 hours. Close to the 6DJ8 / ECC88 / 6922. Tubes have gold grid. Each tube contains 1.408 mg of gold . Valves can be of different years of manufacture. Each valve is individually tested with a valve tester. The 6N1P-EV (Cyrillic: 6Н1П-ЕВ) is a USSR-made miniature 9-pin medium gain double triode vacuum tube intended for use as a line audio amplifier and cathode driver. Basic data: Uf = 6.3 V, If = 600 mA µ = 35 Ia = 7.5 mA S = 4.35 mA/V Pa = 2.2 W The closest western equivalent to the 6N1P-EV is the well known 6BQ7A. A ruggedized/extended ratings version of the tube is designated 6N1P-EV (Cyrillic: 6Н1П-ЕВ). It has currently found a use as a driver tube in hi-fi tube amplifiers (such as Audio Research models VS55 and VS110) because of its excellent low distortion and low noise characteristics. The 6N1P-EV tubes are similar to the 6DJ8/6922 families, but NOT a direct replacement , because of the few different parameters! Still, because of the warm, soft, true vintage sound, they are very good upgrade to the western close analogs, if you consider adjusting your amp. IMPORTANT INFORMATION! BE SURE TO READ BEFORE ORDERING! In the title of the lot is the name of the vintage Soviet tube and after the symbol ~ the name of the Western analog. Be careful! Soviet tubes are only approximate analogs of Western tubes and match pinout, but are not exact copies of Western tubes. Testing Soviet tubes with Western-made tube testers can sometimes show unreliable results. Programs (Cards) designed for testing Western tubes can sometimes show unreliable results and erroneously show that the tube is not good enough. But these are unreliable results and should be disregarded. The volt-ampere characteristics of Soviet tubes are different from their Western analogs! Use for testing exclusively testers with programs for testing Soviet tubes. If you would like to get the datasheet for the Soviet tubes in this lot, please send me a message before you place your order and I will send you a JPG datasheet for the Soviet tube. Also, do not test vintage tubes with modern digital pulse powered tube testers. Use only testers with a classic power supply. For reliable measurement results, warm up each tube for at least 5 minutes prior to measurement. I do not accept any claims on the quality of tubes if you test purchased Soviet tubes of this lot on testers with programs (modes) of testing Western tubes or test tubes on digital testers with pulse power supply. Dear customer, you can combine shipping buying more than one lot. If You need more than one lot, or another quantity – please contact. Also please check other available items. Thanks in advance!