Rod,
I've owned a BAT VK-75SE, and a highly modified one at that. As with most BAT gear, there is not much you can do with tube rolling, as the tubes used are all based from the Russian military. You could try spending $300/tube for BAT's NOS 6H30's....you may, or may not hear a difference.
I spent big $$$ trying to replace the (6) 6SN7's against the advice of Victor Khemenko. The NOS red base Sylvania's did sound better, IMHO....but after 2 weeks they broke up and stopped working. I put the stock Sovtek's back in and the amp worked as normal. Victor warned that the VK-75SE amp pushed the 6SN7 tubes very hard....I didn't listen originally, but after time I would agree with Victor.
Cheers,
John
I've owned a BAT VK-75SE, and a highly modified one at that. As with most BAT gear, there is not much you can do with tube rolling, as the tubes used are all based from the Russian military. You could try spending $300/tube for BAT's NOS 6H30's....you may, or may not hear a difference.
I spent big $$$ trying to replace the (6) 6SN7's against the advice of Victor Khemenko. The NOS red base Sylvania's did sound better, IMHO....but after 2 weeks they broke up and stopped working. I put the stock Sovtek's back in and the amp worked as normal. Victor warned that the VK-75SE amp pushed the 6SN7 tubes very hard....I didn't listen originally, but after time I would agree with Victor.
Cheers,
John