This is the bare PCB of a heavy duty DC power supply that can output single rail of voltage. The board can be configured as either normal C filtering , or CRC filtering. Single rail voltage is used in OTL amplifiers, such as our item "Pure Class A SEPP amplifier PCB JLH 1969 original !" and uncountable OTL solid state designs. When two of this board are use, a dual rail power supply can be formed to be used for OCL amplifiers. Such dual rail supply has very good performance since each rail has its own rectification.There are a lot of high-end commercial amplifiers using such form of dual rail structure. As all of our power boards, this board has thickness of 2mm ( normal board thickness is 1.6mm) PCB dimension : 204mm x 73mm. PCB thickness : 2mm. Copper thickness :75um( 4 times normal thickness !) gold plated Finishing : double-sided solder resist We do air shipping worldwide at US$6.00. We welcome combine shipping. Powered by SoldEazy