@Dweller said: "I put this bug in their ear a few years ago. Asked why they wouldn’t produce other kinds of tubes. Hope they listened. I’d like to see them make a Russian military-grade 6H30-DR tube."
I made the same request. I use old stock DR variants, currently a quad made in the late ’70s. Given the fairly common use of this tube in ARC, BAT, I would think there should be more options. True old DR 6H30s are not only expensive but hard to find. I have the Veloce 2.0 line stage with all the current upgrades- I hear a considerable difference between these old tubes and current Russian production.
This is not something that is going to happen overnight, but long run, would be nice.
I gather some folks that use the tube do not hear as pronounced a difference, but it may be how it is deployed in the circuit.