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Re: 12BH7 in McIntosh MC-240

The GE 12BH7s seem to last in my amps. The 6913 Mil spec seems to be the same tube. The new EIs will work but have a short life. No one mentioned using 5963s in place of the 12au7a. The 60s grey plate GEs will improve the sound, or at least in my 75s.
RCA black plate 5751s and GE 5751s are good input tubes and the RCA 12at7a is no slouch. GE 6201s are good for a more agressive sound. Tube selection depends on your speakers so roll on!
Ron-C


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