Aloha! I have two Sharp minidisc units (both won off of eBay): an MD-MT821 and an MD-MT15. Both requires "DC in 5V". The MT15 has no ac adapter and the MT821 came with a 100Vac power supply (Japanese). Other than ordering a power supply from Sharp I was wondering if this power supply from RadioShack will suffice: Catalog #: 273-1696 Digital Camera Power Adapter DC 3, 5, 6, 6.5, 7, 7.5 V (2000 mA) 5Vdc can be selected but at an amperage of up to 2000 mA (2A)! I thinking it would work, but the 2A sounds frightening... Any thoughts anyone? Thanks for any reply!