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@mattly @brhfl @alisynthesis

Another contender would be the Linnstrument 200 (the big one)

“Standard round power connector, for use when not getting power from USB. Any DC power supply, center negative or center positive from 7.5 to 15 volts, at least 300 mA can be used. Or any AC supply with 9 to 15 volts, at least 300+ mA, can also be used.”