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*Volt-Amps Turn Relationship


Randy Gross

Jan 1, 1970

I'm having a little trouble developing a power supply to deliver 14 vac
@ 10 amps. I modified a MOT to deliver 14 volts but, the primary (5
amps) and secondary (41 amp) amperages are so high, I had to put a large
Iron cored inductor in series with the sec. to reduce the 41 amps down
to 10. The power supply dwarfs the original design perimeter. I need to
design a tranny to deliver what I need in a smaller package. What I need
to determine is the primary to secondary turns and core size to deliver
14 vac @ 10 amps.

I have formulas for determining/modifying the volt amps in an existing
design and, I understand these. What I don't know is how to target a
specific set of values and how the core is used to achieve them. If you
know of a source of information, please direct me.

I realize I could find and purchase a supply to fit this need but, what
would I learn?