The other three are 12au7 : Hey : Can you guys tell me what vacuum tubes go in the Crate GT-2oo guitar amp. All my tubes were made in Germany and I don’t have a clue what the numbers mean. I tried looking them up but no luck. A schematic would help.The only one I recognize is a Sovtec 12AX7WA. The other say ( MADE IN GERMANY, HOT ROD 9312, 95-120-01). This is the writing on the other vacuum tubes. If someone can give me the replacement tube model #s I would appreciate it. : Thanks : Erne