On list is two pieces of high current DC regulator boards, using LM317K ( TO-3 package of LM317), or LM338K. Naim used two pieces of such regulator in their famous linear power supply hicap 1C. 

The values printed on the board allows a steady +24V to be output.

Users can change the resistor divider values for other fixed DC values.

Supply voltage : AC 6V to 24V 

Board Dimension : 54mm x 92mm

Board Thickness : 1.6mm

Copper thickness : 70um ( 4 times standard copper thickness)

We provide schematic and part list to buyers by EMAIL( to be attached to the shipment notice).

We do air shipping worldwide at US$4.50. We welcome combine shipping.