Restoring a Hughes & Kettner Bass Master

The Hughes & Kettner Bass Master is a nice 5 Watt tiny bass tube amp but it’s getting old and might need somme servicing…

Block diagram

The circuit board with original power supply capacitors, values from left to right : 15µF/450V – 33µF/450V – 33µF/450V – 33µF/450V

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