What's with BAT?


I’ve noticed that, over the last few years, BAT tube preamps have gone almost exclusively to the 6H30 tube. No more tube rolling like in the older preamps, such as my VK-3i. Any ideas as to why this has happened?

rlb61
The 60H30 tube BAT is using is the supertube version , there is no better
kind available , this tube last much longer than the standard version .
In my ARC gear all 6H30 tubes have been replaced by the 6H30P-DR 
version , just not only the lifetime , but also more musically 
The Russian 6H30 was actually introduced to the USA by BAT(who has as it’s designer a genuine Russian rocket scientist). The tube is more efficient than the previous 6DJ8/6922, allowing less tubes in circuit, to perform the same job. ie: My VK-D5 uses six 6922s(early sixties, Siemens CCa Grey Shields) vs the VK-D5 SE’s four 6H30s. It’s also an innately quieter design, which makes it attractive for high-gain devices. Nowhere near as many variants/iterations as the manufactured for many decades, by a plethora of providers, with as many sonic signatures, 6DJ8/6922/ECC88/6N23P types.
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