[John Candle]

Yes use a common ordinary coax grounding block for coax grounding. With a common ordinary coax ground block , the outer shield and shield wires of the coax is grounded , this diverts signals that are received by the coax shield/shield wires to ground and leaves a cleaner signal on the center conductor - the signal carrying wire - of the coax. The house electric service ground wire can be used for grounding. As a phone man you know that all manner of grounding hard ware is available at Home Depot and Lowes. Ground wire , split bolts and etc..