11-04-2013, 03:43 PM
Generally, only sets made in Canada had 25 Hz power transformers. If yours is 25 Hz, it would be HUGE in comparison to a 60 Hz unit, as they require a lot more iron.
Design specifications varied from manufacturer to manufacturer. Zenith tended to use the least expensive transformers they could get away with. They were borderline at 115V, and pushing it at 117, which was the de-facto standard in the 30's. Of course, they've never been able to hold to any given voltage because of varying line losses, etc. (but the US is WAY better than here.. our line voltage varies from 210-230 volts depending upon how much is being used at any one time.)
Design specifications varied from manufacturer to manufacturer. Zenith tended to use the least expensive transformers they could get away with. They were borderline at 115V, and pushing it at 117, which was the de-facto standard in the 30's. Of course, they've never been able to hold to any given voltage because of varying line losses, etc. (but the US is WAY better than here.. our line voltage varies from 210-230 volts depending upon how much is being used at any one time.)
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