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.

They are common twin-triodes that appear in a lot of audio gear, including
church organs. The Raytheon units tended to have more heater-to-cathode
leakage problems than the other American types, but definitely have less
than the modern Russian ones.

Since the Russians currently make an excellent 6SN7, I think the market
for old pulls is somewhat limited. But throw them up on Ebay and see if
anyone bites.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."