Description
Pair 6N3P-EV Rocket (Soviet, USSR) Tested Audio Amp Preamp Audio Stereo Vintage Radio Vacuum Tube Military Spec , See Picture Box for Test Results , Same Date , USSR Vinitsca Factory , Tested , Than 5000 hours Russian double triode 6N3P-DR (6Н3П-ДР) tube designed for voltage amplification and low frequency oscillation. Equivalent to the 2C51 / 5670 / 6CC42. RUSSIAN TUBES – LAST LETTERS (suffix) MEANING: V (B) - Tubes of increased reliability and mechanical strength. E - Long-life tubes with guaranteed life of more than 5,000 hours. EV (EB) - Tubes of increased reliability, mechanical strength guaranteed life of more than 5,000 hours. D (Д) - Extremely durable tubes with guaranteed life of more than 10,000 hours. DR (ДР) - Tubes of special, very high reliability, mechanical strength, and guaranteed life of more than 10,000 hours. I (И) - Tubes designed to operate in pulsed mode, characterized by increased emissivity of the cathode. K - Tubes with high vibration resistance. R (P) - Tubes of special, very high reliability, mechanical strength. OS (ОС) – Tubes special assembly (for the aviation industry). We combine shipping Return Free Take a good look at the pictures as they give a much better description than words can If you have any questions, please ask them before bidding Shipping charge of $5.95 to anywhere within the lower 48 United States Thanks