"Jim M." wrote in message
. 6...
A fluorescent ballast for my son's aquarium blew a couple resistors. This
part is built into the cover of the aquarium so I'd rather try to replace
the blown components than the whole thing. Can anyone assist with
determining the value of the resistors so I can try replacing them? I
can't
find any info using the ballast model number. The bulb is 8w.

Picture of ballast:

http://members.cox.net/4wdcivic/images/ballast.jpg

TIA! - JIM


If you replace the resistors they'll just blow up again. I bet you'll find
both power transistors are shorted, particularly since they've used wimpy
TO-92 transistors where big TO-220 cased devices were obviously the original
design.

Personally I wouldn't even mess with it, you can get a suitable ballast
circuit board out of a compact fluorescent lamp, or you can get a nice
electronic ballast on ebay that'll work. I used a Triad ballast designed for
18W CFL's to replace the shorted chokes in my spa ozonator which has an 8W
lamp.