Hi, Ole Bob! Thanks for your magnificent experimentation!
I think that Svedberg, the Nobel laureate colloidalist, said that the advantages of HVAC did not become really noticeable until RF and higher frequencies are used. (He was referring to the Bredig underwater arc method, which is a pre-1938 grandfathered method for sure.) Also, microwave ovens that are broken and otherwise ready for the scrap-pile may be put to good use. The have important built-in safey features. They might make handy Faraday cages to sequester what would otherwise be undesirable RF escaping (for those who might want to do RF Bredig process work like that of Svedberg.) Also, the lock-out mechanism and circuitry might protect those who wish to sequester a HVDC setup. Best regards, Matthew
