My equipment is not ungrounded. It is safety grounded via the ground on the AC power cords. The copper pipe ground referred to I would not characterize as a station ground and depending on lengths involved, may or may not be effective as an RF ground. I was referring to a ground rod located outside the station where antenna coax shields are connected (outside before entering the shack) and to which station equipment is grounded and then that rod bonded to the AC mains ground rod.
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73, Norm/KC1BMD
Norm - KC1BMD