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Here are the pictures for the stock one that is 6 tubes (V1 to V6).
https://imageshack.com/i/fkkncrg
https://imageshack.com/i/nm3q84g
https://imageshack.com/i/ne4p1ij
And this is the one claimed the same circuit but with 5 tubes on the signal path.
https://imageshack.com/i/n7n0g9g
Are they really the same?? thx in advance!