filament trans.

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Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mystuffs-at-orwell-dot-net>

hi all,
for those looking for a filament transformer for there tubes in a vttc,
i have made a nice one out of a 1000w 208\277v HID ballast transformer.
i left the 208\277v primary in place a wound twin 12g windings around a
home made bobbin for 12 turns each, this worked out to the 5v i need for
my VT-127A'S. the trans. now gives me 5v from the 277v winding, 7.5v
from the 208v winding, 10v from the two combined from the 277v winding
and 15v from the two and the 208v windings.
i left all the shunts in place because with the normal 330v-at-800ma
output, the new windings should give 52 amp on the single 5v winding.
much more then the wire will stand, i now wish i would have used 10 or 8
g wire because i have the room. i have three more exact same ballast's
so the next will use heavier wire.
just thought i'd mention this cheap and easy filament transformer
because most could get the ballast's from there local electrical
contractors that deal with  high intensity discharge lamps.
take care,
marc m.