On 2019-07-11 8:09 p.m., alb.001 alb.001 wrote:
The switch next to voltage is 50 or 400 Hz. Not really compatible with North American 60 Hz. Only place I see 400 Hz is in aircraft systems, not common usage. Does it use the input frequency for a time base ?
there is a lot less iron needed in a transformer for 400Hz. so probably the 400hz side cuts out part of the winding of the transformer to compensate. a 50Hz transformer should be close on 60Hz. I have an ancient TV set that I used for about a year when I was a kid before I noticed it was a 25Hz set. In that case, again the transformer was massive and so the internal voltages were so high that the Picture tube was very worn.
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