Quote:
Originally Posted by 1100 man
Were American sets of that period designed for AC/DC mains and therefore 'live chassis' or did they have mains transformers? Thinking about it, if they were designed to operate from 110v, it would not be possible to get enough HT (usually 200V or so) with UK type design. I imagine, therefore, they were for AC only and will have a transformer. I would be interested to know!
Outside of New York, I don't know if DC mains was still in use in the 1950's in certain areas.
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Almost all the larger, older cities in the US had DC districts where larger buildings with elevators (lifts) were common. Many areas, it was being used until the late '60s. Around that time, the electrical suppliers ceased supplying DC power. The building owner had to furnish an alternate source of DC, either a rectifier or M-G set.