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RE: 6u8a vs 6678 vs green US Navy Sylvania??

Thanks Mike. Have you compared the standard yellow to the green. Are 6678 specs the same as mil spec? I'm assuming that the greens for the navy are mil spec. Tough questions. It sounds like you are familiar with these tubes. I think they blow away the RCA bp except in the bass. And every thing else I have tried. Have you an opinion on anything that would beat the Syl?? I'll have to try one, either the green or 6678. Thanks, Tweaker


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