i have a astron 20amp supply

want to replace the iron transformer with a torroid

(to reduce noise)

the primary needs to be 120vac 60hz

not yet sure what their exact 2ndary is but guess it's got to be around
13v and able to handle the 25amp dc 20amp cont


is their any rules of thumb doing such a replacement or do i just match
the original spec's to the new toroid?


any good places for such a torrid? i couldn't find any in this range


btw

how do you mount one in a sheet metal enclosure? i presume the unit
can't come close to the metal case so i guess a small raised plastic
block and tie wraps?



thanks