This Arrakis 1200-10S Console has been modified in the shop to have a convenient grounding strip (buss) across the rear.  The photo was taken with the front panel open exposing the three main circuit cards inside.  At the rear of each card is a row of white plug-in connectors.  The connectors do not have ground brought to them at each card because noise may be induced into the audio card if current flows in the ground conductor.  To get around the problem, we have installed a 1/8 x 3/4-inch aluminum buss along the rear of the console case.  There is a convenient 1/2-inch area to bolt the buss to the chassis.  Along the front of the buss are sixteen 6-32x1/2-inch machine screws.  To do that, we had to drill and tap thread each hole. 

The station ground should be firmly connected to this aluminum buss along with the shields of audio cables coming to and going from the console.  Actually, shields are connected or not connected depending the the individual situation for that audio run.  Making the right decisions will result in clean hum-free audio.