M.M. wrote:
I have a few raytheon 6SN7-GTB that are in matched quad packaging that
were removed from various church organs. What are they used for and
what are they worth? And guitar amos use these? Thanks ...M.M.

6SN7's are twin medium mu triodes in an octal package. They are used as
preamplifier tubes, and as phase splitter/driver tubes for Push-Pull output
stages in audio amplifiers. They are huskier, though roughly similar to the
12AU7.

What are they worth? Whatever you can get for them. They are worth little
or nothing to me... lots more to others.

-Chuck