6n2p-ev-os 6Н2П-ЕВ-ОС Rare Hifi Especially Stable Military <> Matched Tube Pair

US $220

European Union, Bulgaria
Oct 20th

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6N2P-EV-OS ( 6Н2П-ЕВ-ОС ) Super RARE Version - EV Improved Characteristics and Extended Lifespan. - OS Especially Stable, selected for usage in Soviet Space and Nuclear programs. ZERO MICROPHONY TESTS STRONG & BALANCED Double Triode Tubes by Voskhod, Kaluga Factory <> Military Grade <> Rhombus and OTK Stamps / GOLD GRID / Electrically MATCHED PAIR Tube1 - 1976 made / Ia1 = - 1,9mA / Ia2 = - 1,9mA / S1 = 1.9mA/V / S2 = 1.9mA/V Tube2 - 1983 made / Ia1 = - 1,9mA / Ia2 = - 1,9mA / S1 = 1.9mA/V / S2 = 1.8mA/V TESTED at catalogue parameters: Ua - 250V ; Ug1 - 1.5V Where 100% is: Ia = 2,3 & S = 2,0 We test our tubes from this type on High-End Soviet Military Tube Tester: L3-3, as pictured below! The 6N2P, (Russian: 6Н2П) also sometimes spelled in English "6H2Pi" is a miniature 9-pin dual triode vacuum tube manufactured in USSR, Russia and China with characteristics similar to the RCA 12AX7. The most significant difference between the two is that 6N2P has its two filament elements connected in parallel, unlike the series filament connection of the 12AX7, and it is thus only possible to operate it from a 6.3 volt, 300 mA filament supply (whereas a 12AX7 may be operated from either 6.3 or 12.6 volts.) The 6N2P also has slightly lower gain than a 12AX7. The 6N2P (6Н2П) is very similar to the ECC83 /12AX7 but it has a slightly different pinning SHIPPING The item(s) will be shipped by: ECONOMY mail ( without tracking ) or STANDART mail ( registered post with tracking ), it depends on what service you will choose during the checkout. Due to severe delays for the ECONOMY mail sent to USA and Canada we recommend using STANDART with tracking to those countries! We reserve our right to offer only STANDART and/or better service to selected listings and countries. ETA: Economy ( Europe 10-20 business days / Rest of the world 15-45 business days ) Standart ( Europe 7 - 10 business days / Rest of the world 10-15 business days) NOTE: If you purchase several items we will combine the shipment to reduce shipment costs. Just request us for total, when you finish shopping and before you complete checkout. PAYMENT 1. PayPal - www.paypal.com TAKE ADVANTAGE!BEST PRICES! We are open to negotiate through eBay "Best Offer" option for any of our listings! ANY QUESTIONS?Contact us! We are happy to talk to you! We are now offering LIVE SUPPORT too! You can easily reach us (10:00 - 16:00h +2GMT during business days) from the link at the bottom of this page or just leave a message and we will get back to you ASAP.