6N3P-E (6Н3П-Е) LOT OF 1 RUSSIAN PREAMP TUBE TESTED NOS = ECC42 = 2C51 = 5670
Equivalent to the 2C51 / 5670 / 6CC42. Tube is tested with professional tube Tester L3-3. Ia1 tube | Ia2 tube | pcs. Technical data Japan, South Korea 10 % 85 % 5 % 0 % 0 %. They do not carry technical information.