Has anyone upgraded power cord connectors?

Subaruguru, I beg to differ as the connectors make up at least fifty percent of the "sound" of a power inlet cord.

David d, I don't know where you find copper AC connectors as the better ones all seem to be Olin 688 brass, an alloy which is about 73-75% copper.....The problem with most of these is that the screws and tines on the neutral side are nickel plated and these cost like the devil to have them remade in the 688 brass, so much that I named my new cord the "688" model....

David d, I make my living primarily on TG power cords.....A DIY version of the TG cords would be hard to make as the wire and connectors are either modified significantly or built to my specs....The Belden 19364 recipe I published some time ago will compete with most of the aftermarket cords out there and lends itself to DIY a bit better....Now copper connectors sure would be soft and don't think they would be very useful as they would have very little spring action....They would deform almost immediately.....

The last couple of houses I have lived in are only grounded where there is running water; kitchen, laundry and bathrooms, but I would attach the drain wire to the wall plug end only....

The 19364 cords I made up was over twenty years ago as I brought out my first commerical power cord in 1985 which was a highly capacitive/low inductance cord, a different design altogether....I never sold 19364 cords, but that is where I started as 19364 cords came with Levinson gear and some off brand came with Threshold gear and the 19364 sounded "better" which made little sense to me then, but I ran with it.....You will find the duplexes remarkably similar as they all have to work with the same plugs you know! I think most everyone is using Olin 688 brass, but they all are really secretive about their annealing processes that the brass goes through to make it "springy"....I like the Pass & Seymour myself, but the cheapest one, the 5242-I as it just has nickel plated screws on the neutral side that need to be replaced is all and no steel in the AC's path at all....The really expensive Pass & Seymour uses brass clamping plates and might be really nice, but I haven't played with it. The ones I use here are the ACME silver plated 5242-I and, other than a really nasty and long break-in, are my favorites as they focus better than the others I have tried....