12bh7 TUBES

Hi,
I have 12bh7 tubes in my power amp,can I change with a 12au7 are they the same?

yogiboy06-03-2009 9:11pm

gmuffley Details Discussions Posts This discussion Message User 132 posts 06-03-2009 at 11:16pm Copy Comment URL Report Comment Edit Delete The 12BH7 tube draws twice the filament current of a 12AU7, so that can be an issue if the filament supply has marginal current capability.