I purchased 5V, 12V, & 15V versions of the Solas power supplies made in Germany. The SCP30S15DN 15V @ 2A 2 A Amp 100-240V 0.75A are currently selling on ebay for about $25. I have not done any extensive testing but have not noticed any power irregularities or hash. They seem to be very well made units made for an industrial setting. Keith, N4KDJ