I finished my operating desk rebuild yesterday.
8 feet long, 36 inches deep 5/8 laminated plywood top.
Supported by 3 frames made from 2X4's and also cross braced underneath.
There is a 6 foot X 20 inch wide shelf underneath.
Two shelves sitting on the desk are supported with 1"x1/4" flat stock brackets a friend of mine made.
Shelving is 1" X 12" rough pine I sanded down and stained the same color as the desk top. All surfaces are finished with 3 coats of polyurethane.
I have a 32 inch long X10" shelf above the radio to hold the remote coax switch, volt meter, watt meter, SignaLink USB, Winkeyer and PS.
It is not high tech but it works!http://www.qsl.net/ve3fmc/webdoc9.html