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Replacing GZ34 in a JTM45. Rebias needed?

Posted: Fri Sep 24, 2010 1:33 pm
by Melodyman
Hi all..

Not sure about this one so I thought I'd throw it out to you experts..
Found a brand new late 60's Mullard GZ34 and want to replace the Sovtek GZ34 in my amp with this Mullard. Do I need to rebias the amp or is this a straight swap? I'm using Gold Lion KT66 and NOS Mullard/RFT preamps tubes in v1-v3.
TIA.

Re: Replacing GZ34 in a JTM45. Rebias needed?

Posted: Fri Sep 24, 2010 3:35 pm
by Roe
not really unless one of the tubes gives too low voltage