Hi guys,
I have a Consonance tube amp that came with a couple EH 12bh7 driver tubes each driving a couple of KT88 power tubes in each channel. I wanted to try some driver tube rolling but there seem to be a limited number of 12bh7 tube options available. I was wondering if some other suitable tubes can be used in the driver position in my amp. I have checked the tube database and it looks to me that 12at7 and 12au7 are both identical to 12bh7 with same pin layout. Before I try one in the amp, just wanted to ask the tube experts here if I am correct in my understanding and if 12at7 or 12au7 can be used in place of 12bh7? Also, which of the two, 12au7 & 12at7, is more suitable as a driver tube?
Cheers.