[Phil Allison[_4_]]

gareth magennis wrote:

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Sorry, my post probably read a bit arrogant, but I think you will find all
your problems are down to the wall wart switching adaptor.

See if you can find/borrow a suitable linear alternative to prove yes or
no.


** That is not a practical suggestion.

Yamaha supplied a SMPS adaptor because the output was high current and well regulated.

Finding a suitable *linear* alternative may prove impossible for the OP.



...... Phil