This project has two goals. 1) The ability to take some modules on the road, 2) More expansion space for the modular studio. The cabinets are EWI Tourcase Model R10UE-10 (thanks for the tip, Ivan).
These are nice, strong cases that hold 20U width of MOTM modules. I outfitted them with Synthesis Technology MOTM-19A mounting rails. One of the cabinets has a Power One HAA15-0.8-AG +/-15 volt supply, and the other a Power One HTAA-16W-A triple voltage supply with +5V. These use MOTM-960 and MOTM-990 power distribution boards, respectively.
The depth worked out nicely, with plenty of room in front of the supply for normal MOTM modules. There’s even enough clearance for a Stooge 3-pot long bracket (below).
I built the power supplies into aluminum box enclosures for safety, so that no 120V AC wiring is exposed. The box and cover are Digi-Key parts 377-1028-ND and 377-1047-ND. I found a combination AC inlet, power switch and fuse, Schurter IEC320 AC I, (Mouser 693-4304.6090) for $9.00. It takes the same type of fuses as the MOTM-900/950 (Littlefuse 0239.800HXP for USA), but fuses both sides of the AC line so you need two. The enclosure is mounted on a 3U high blank aluminum rack panel. The whole unit is just another rack-mountable item. It’s essential to use an aluminum panel, not steel, because of the machining required to cut the large rectangular hole for the power connector. I drilled 20 small holes in the enclosure to allow some ventilation, and the whole box being fastened to a big panel also provides conductive heat dissipation, which I hope will be sufficient. On the HAA15 supply the jumpers labeled VW1 and VW2 near the output terminals have to be cut to change from +/-12 to +/-15 volts (thanks to Paul Schreiber for this tip).