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The 51x Version 2 Power Supply PCB is a board with the circuit originally designed by Volker Mayer, better known as [silent:arts]. I basically reformatted it to be used with the new metal work of the Floor Box enclosure. The only changes are on-board fuse holders for each DC rail as well as appropriately placed LED pads. The Floor Box PSU project is a DC supply for the GroupDIY 51x racks. Copper Weight: 2oz Thickness: .079" (2mm) Length: 6" (152.4mm) Width: 4.97" (126.2mm) With the proper toroidal transformer, this PCB will simultaneously deliver the following: 1.5A @ +16VDC 1.5A @ -16VDC 1.5A @ +24VDC 1.5A @ -24VDC 179mA @ +48VDC For example using the VPR spec of 130mA per main voltage rail, 11 modules drawing the maximum allowed current would be 11 * 130mA or 1.43A. Now, keep in mind that all 500 series modules differ. My VP26 mic preamp draws from between 23.3mA to 28.1mA on each of the 16V rails with a gar2520. When driving a 600 ohm load, the VP26 will draw nearly 51mA per each 16V rail. Well within the VPR specs. So, in theory, the 51x Power Supply PCB can easily drive 25 plus VP26 mic preamps on the 16V rails, and still have some headroom. Keep in mind, this example still leaves the 24V rails unused! Many possibilities can be handled with a beefy PSU design like this! A custom toroidal transformer is required to be used with this PCB. The toroidal specifications are as follows: Primary: 2 x 115V Secondary 1: 2 x 24V / 2 x 2.20A Secondary 2: 2 x 16V / 2 x 2.20A Secondary 3: 1 X 48V / 1 X 0.25A Cu-Foil Screened

This project is GroupDIY 51X Compatible