Since ferroresonant power supplies were mentioned, I have to ask the
question, why aren't they used for high voltage supplies? My experience with
them has been at a lower voltage, 26 VDC. Is there a reason other than
weight and expense, that they are not used for high voltage supplies?
I also did not notice the regulation being all that great on the ones I was
exposed to, it seemed voltage from minimal load to full load was almost 10
percent and I also noticed it seem the output voltage was higher with lower
input voltage, example - a 26.5 VDC output with 230 vac in would be 29 VDC
out with 208 VAC in. Another issue was what I considered really high ripple,
around 10 percent with almost 5 percent with minimal load and that was wit
400,000 uF of filter.
The saving grace was they had very few parts and practically never failed.
NG9R
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