Re: Vulcan IIgs Power Supply Repair

[kevin@hackaday.com]

On Saturday, July 7, 2012 12:21:01 AM UTC-5, Polymorph wrote:
> On 7/07/2012 2:21 PM, Michael Black wrote:
> > These filter capacitors operate at a much higher frequency, which means
> > if they go bad, they will do a much worse job than if 60Hz was
> > involved.  The higher frequency ripple that they have to deal with every
> > day may also help to make them go bad.
> >
> > Those filter capacitors after the transformer and diodes are doing much
> > harder work than the high voltage capacitors on the AC side.
> 
> Thanks Michael. I guess I'll continue and try replacing all of the 
> electrolytics after the transformer. I should note though, that none of 
> the capacitors (even the ones I replaced) show any signs of leaking or 
> bulging - but I'm guessing they're still the most likely cause of the 
> failure. The caps after the transformer are all low voltage (I think) 
> and easy to come by for a few dollars.
> 
> Thanks for your advice. :-)
> 
> I'll get the parts tomorrow and post back my results.
> 
> -- 
> 
> Cheers,
> Mike
> 
> Find my Apple II projects online at:
> http://apple2.sytes.net/

you could yank them out and test them, but at that point whats the reason in sticking 20 something year old caps back in when they are beyond their lifespan?