Ovako nekako izgledaju. Kako kažu za 6N6P treba gledati što starije da budu, iz 60-tih, zlatno doba SSSR.
MATCHED PAIR 6N6P/ECC99/E182CC NEW GOLD GRID RUSSIAN TUBE 1980-84!! OTK/RHOMBUS
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(analogue of: ECC99, E182CC). For a pair of 6N6P, we have 4 values for Ip and 4 values for S. Any four values will be maximum +/- 2.5% compared to their average value. +/- 0.28 mA/V for S and +/-0.75 mA for Ip.