It's the Gamma Research HPS-1a, had one for use in an RV worked great with my K3 and KX3 73 Tex ka5y -- View this message in context: http://elecraft.365791.n2.nabble.com/very-small-20A-switching-PS-tp7593251p7593261.html Sent from the Elecraft mailing list archive at Nabble.com.