04-19-15: QdroneAre line conditioner similar to NOS tubes, the older the better? Why bother dealing with brittle, crack ... No Thanks!
Look around the used market for a Tice Power Block and it's companion The Titan. I bought mine for 600 total and I'm very happy with it. You want to pick it up though shipping these behemoths is costly and they can easily be daged in shipping. The rubber grommets that hold the transformers get brittle from age and heat and if they are dropped can.Crack and them the transformer is jostled about damaging the innards. These are the ones that started the AC line enhancer market.
I had a 515 and it's NOT very good to be kind.