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Would anyone happen to know how to decipher Sylvania Letter codes?
I have many with 2 letter codes over a 3 letter code.
Not a whole lot floating around the web as to the significance of these codes.
-Jim
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Which tube type and letters as Sylvania had a few designations. 312 is a number code from them but let us know the tubes you mean..Can you post a photo?
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Here's a couple:
https://goo.gl/photos/1Ujp7C734vtVgCDbA
I'd advise caution using those pin straighteners on those tubes.
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Buy Chinese. Bury freedom.
I know. Not an easy task, but if you get a running start....
BTW: These are both 6L6GC's.
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