On Thursday, October 24, 2013 at 9:17:21 PM UTC-4, Tom Ginkel wrote:
> Can I put 6L6s in my 60's Gibson GA-35rvt without worry?
>
> That amp has some non-standard tubes.
If you currently have 7591s in there and want to use 6L6s, just worry about a proper 6L6 biasing., less overall perceived volume, most likely less clean headroom.