Old stock. The tubes are new and never used
Soviet direct drop in Upgrade for stock Chinese 6J1. Fully Bench tested
Direct Replacement for 6AK5 6J1 6J1P EF95
Best 6J1 upgrade valves available
"Voskhod" factory (rocket logo)
OTK marked
Same Date Code from 1980's (from same batch)
We test our tubes from this type on High-End Military Tube Tester: L3-3
Measured parameters attached to each tube, difference < 3%
on the photo shows an example of tubes with parameters
Lot of 2 (Matched & Balanced Pair)
Other tubes in stock in the USA (t