12bh7 TUBES

I have 12bh7 tubes in my power amp,can I change with a 12au7 are they the same?
It depends on the circuit. You can't make a "blanket" statement that "ANY" 12BH7 can be subbed for a 12AU7 and vice versa...
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.
Per above, ask the manufacturer of the amp. They are not identical.
Thanks for the info,I got in touch with manufacturer and said I can use but will not last as long the 12bh7 is a stronger tube.