Finding solutions to ground noise issues is tough to troubleshoot via internet forums.
First, check the outdoor source where the signal comes to your house. Is there a ground bus (wire to rod in the earth)? If not, I'd have your cable company come out and help you troubleshoot. They should install a ground rod at their expense.
If there is still an unresolved issue, I would look into a "TV ground loop isolator" as W9TR suggested. Or, since your problem is solved by a good power conditioner that has a loop for your cable feed, upgrade your Panamax to something better. I think a good Furman will do the job, but there are a lot of power conditioner options out there.
Ultimately, if things work with the Panamax, why are you doing anything different? If it ain't broke, don't fix it.
|