Voltcraft fixed voltage linear power supply bench voltcraft fsp 1138 the voltcraft fsp 1138 is a 110w fixed voltage linear power supply suitable for use in laboratories workshops and industry the fsp 1138 is electronically regulated and produces 138v dc and 8a with a current limiter its steel plate enclosure makes the fsp 1138 suitable for use even in demanding industrial conditions voltcraft fsp 1138 8a fixed voltage power supply