On Wed, 29 Apr 2009 15:33:43 -0600, Richard <legalize at xmission.com> wrote: This is a great way of going if you are willing to re-rack your equipment. The electronics trailers are specially designed to channel cooling to the racks - some having zone controls. Generally, there is also sufficient power distribution to handle the equipment you described. A number of years ago I outfitted a thirty-foot surplus equipment trailer with a Modcomp II, data recorders, printer, and data acquisition equipment for an atmospheric optical transfer function experiment. The trailer I came up with had a row of racks that covered one side leaving the other for a console and printer and room for everyone involved to escape the elements. We operated out of Tucson, Arizona with sites at Cape Canaveral in the summer, Lake Tahoe in the winter, and Bolder, Colorado in the summer. About 10,000 miles of travel in all with no equipment failures! There were two zones of cooling: one for the equipment in the bays and the other for the personnel space. There was over 100 Amps available in the racks with 3-phase 220/110V wiring. Another avenue to investigate are surplus equipment shelters. These shelters have environmental systems, racks, and power distribution. You hire a crane/big fork lift and a flatbed to move the beasts and generally will go for less than the trailers. CRC