@Carl I do not believe this analysis is correct. Behind the circuit breakers are two solid copper bus bars, each connected to the separate "phases" of a typical residential electrical supply. Here's...

Is my situation similar to this discussion? I have four PA-9020P. Performance as reported by the Powerline tpPLC utility is directly related to distance. The farther apart adapters are, the slower...

@UnWired Thanks. I had imagined that someone would fire back a screen shot of 16 PA9020's with the comment, "duh. So THERE." Then, I would have to come back with, "but, did you try it with a mix of...

@UnWired This has been truly instructive. I removed one of the V1 PA9020's and replaced it with the new (V3.8) one. tlPLC utility "works fine". Click on any of the four units and see the transmit...

@Tony I did plug the PA9020 into a couple of other electrical outlets and verified that the strange behavior exists. Creating a data stream is a good idea, and I will do that today. I am not...

@Tony Thanks for responding. Never one to "leave well enough alone", I did march down to the electric panel and switch a couple of circuit breakers to get both Powerline circuits on the same phase....