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Re: A 12ax7 is not a direct sub for a 12au7. Try a good vintage tube like ...

Thank you very much Sir for your very kind and helpfuld advice.
Actually I felt that an 12ax7 in 12au7 was not a smart move.
Nevertheless I have been impressed by the result.
Maybe the original 12au7 is quite bad.
As I said the duty for the selected 12au7 is that of a buffer.
Actually I am putting down a list of very good 12au7 tubes.
Is there the problem of "fake" pieces with them as with Telefunken NOS tubes ?

Thank you so much sincerely.
Kind regards,

beppe



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