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Uesugi 211 amp

the amp has some merit , direct coupling of 211 , and of 6AU6 to 12BH7 as well

the driver stage is used as a CF ensuring good drive capabilities .

otherwise , feedback is used , the 6AU6 runs at a very low voltage ( not a big issue because of small signal )

the 211 is not my favourite , and 5K outputimp is low , too low .

But overall a nice schematic for its time .