Total posts : 45366
In the case of the neutral injection method of carrier current, the “official” instruction sheet printed from LPB specifies having a separate self-installed ground rod, so I think you are probably right MICROdog.
Yet, the standard method of delivering into the HOTS with the ground-side to the neutral side is considered the ORIGINAL way of doing it, and is expected to tune up with a coupler so that range is improved and standing-wave reduced.
However, given our own small and local experience, we note that all the literature says that results are extremely different from one case to another because of how electric lines are all different lengths and have different loads… there is no such thing as a “perfect” electrical line situation.
In the attempt to be able to adapt to such a wide range of conditions the professional couplers have a very wide-range of settings. But when NONE of the available settings achieve a decent tuning we are stuck with a problem.