The keyboard's microprocessor and the cable leading to the display enclosure are shielded with copper tape and copper mesh. The rest of the Montana computer is housed in a wooden box located at the opposite end of the house from the user s workstation. The box is lined with aluminum foil. It has a small door that can be opened to insert and remove floppy disks and CDs and a large door for maintenance. Inside the box is a Dell PC as well as an external power supply for the LCD panel, power supplies for audio amplifiers, and devices that enable the use of extremely long cables for the keyboard, trackball, video, and audio.
All power supplies have five percent silicon steel shielding.
The doors have gaskets that provide connectivity where they join the box. The gasketing is essential to enable the box to perform effectively as a shield for RF emissions. It consists of conductive tape over strips of foam. Two steel pipes run from the workstation box up through the attic and connect to the remote computer box. One carries cables for the video, keyboard, trackball, and audio while the other connects to a sound-insulated blower fan located in the attic.