Tubes - What do the letters mean

I'm new to tubes, so I'm trying to learn as much as possible. I'm trying to find out what the extra letters on the tube model number mean, i.e., 12AX7WA. How is the 12AX7WA different from the 12AX7 and the 12AX7A?

tbone03-29-2001 8:19pm

Showing 2 responses by jim

jim Details Discussions Posts This discussion Message User 418 posts 03-29-2001 at 09:44pm Copy Comment URL Report Comment Edit Delete Tbone, the last issue of Vacuum Tube Valley focused on 12AX7's. This may be of interest to you and help answer your specific questions.
jim Details Discussions Posts This discussion Message User 418 posts 03-30-2001 at 06:06am Copy Comment URL Report Comment Edit Delete Dekay, thanks again for another tip. I was not aware of the search feature at Audio Asylum. I'm heading to "Out Of The Closet" tomorrow, but was able to pick up 20 virgin jewel boxes from a friend of mine in Culver City. His shop is next door to a fullfillment house and they happened to have a bunch of corporate instructional CD's. Free, and he gave me something that fixed the small leak in the radiator of my Alfa. It was a good day. You seem to have a good handle on tubes. I just ordered Telefunken 12AX7's and RCA 6L6GC's -- both 60's vintage -- for my Mesa Baron. Thanks again for the info...

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