Thanks everyone for your responses especially shkong78 . Comparing them to NOS WE tubes and saying they hold their own tells me a lot and is exactly what I was looking for.
Anyone try the Psvane Acme Supreme 300 B tubes ?
I recently replaced a couple pairs of Shuguang 845 Nature Series tubes with the Psvane Acme Supremes and right out of the box I was very impressed.My 300 B tubes have quite a few hours on them and I am considering replacing them with the new Psvane. If you have experience with these tubes I would love to hear about your impressions and possible comparisons to other 300 B tubes you have used.