These tubes were poorly made for something claiming to be the best! Not the suppliers fault, but the manufacturers, I feel these were more like seconds, some internal plates set indifferently, bits of print and glue spatters on the tubes and one had a pin that was never soldered in production, I had to repair this myself! I fail to believe they balance tested these with a pin for the heater not properly connected! I hope they sound better than they look?
Received my matched pair of tubes in good order and they appear to be working properly