Gene Pink
Well-known member
I have an ongoing need for caps similar to this, jpeg attached, 4.7uF 250V AC rated, it has to deal with near 1/3 amp continuously. There are 44 of these in use here, and when they wear down to less than 3uF, they are useless.
This is in a fluorescent lighting ballast from a cheap-ass "Shop Light", used in series with a 0.3H choke, direct to a single 40W tube for the "on" drive current. New replacement ballasts are 16 bucks, the whole fixture is only 12 bucks. That figures.
Note the lumps at the top of this cap, that is a 750K resistor encased, to bleed off the charge, just in case you unplug it live, and for some reason, decide to lick the plug. I don't need that, I can add my own "plug lick safe" resistor. Or not.
I have already exhausted my supply of 4.7's, and am now down to paralleling two 2.2UF's and a 1M resistor, close enough, they'll hold an arc.
Does anyone have a source for 4.7uF's at less than 5 bucks each, or any other 4.7uF that will handle the AC current?
Thanks,
Gene
This is in a fluorescent lighting ballast from a cheap-ass "Shop Light", used in series with a 0.3H choke, direct to a single 40W tube for the "on" drive current. New replacement ballasts are 16 bucks, the whole fixture is only 12 bucks. That figures.
Note the lumps at the top of this cap, that is a 750K resistor encased, to bleed off the charge, just in case you unplug it live, and for some reason, decide to lick the plug. I don't need that, I can add my own "plug lick safe" resistor. Or not.
I have already exhausted my supply of 4.7's, and am now down to paralleling two 2.2UF's and a 1M resistor, close enough, they'll hold an arc.
Does anyone have a source for 4.7uF's at less than 5 bucks each, or any other 4.7uF that will handle the AC current?
Thanks,
Gene