litt@bnlux0.bnl.gov (Laurence Littenberg) (12/23/88)
I have an SM124 (monochrome) monitor down with the capacitor problem mentioned a couple of times recently on the net. The repair shop claims they can't get a proper replacement for the cap. The specs are 2.2uf @ 25volts which are not hard to come by. But the replacements work for a while (typically a couple of hours) then blow out. One possible hint at what's going on is that the original caps are physically very large (barrel mount ~ 1/2" by ~ 3/4") whereas available replacements are much smaller, and apparantly less robust. The monitors in question were apparently made for Atari by Gold Star in Korea. Any suggestions?
rich@lakesys.UUCP (Richard Dankert) (12/26/88)
[] In article <709@bnlux0.bnl.gov> litt@bnlux0.bnl.gov (Laurence Littenberg) writes: > > > I have an SM124 (monochrome) monitor etc... >specs are 2.2uf @ 25volts which are not hard to come by. > Any suggestions? Sure; Just use a larger size (as in working voltage) capacitor. The value the same, just that it's working voltage is larger. Should hold up better,providing that there isn't something else causing the cap tp fry up. Typically with caps, you can go `larger' with both the value and the working voltage, but this is dependant apon whether or not the cap is used for timing purposes or not. To be safe, just get a 2.2uf @ 75 ~ 100 wv. Should solve the problems....... rich..... UUCP: rich@lakesys.lakesys.COM {always .... }
chasm@killer.DALLAS.TX.US (Charles Marslett) (12/26/88)
A very critical parameter in a power supply cap is the amout of current it can carry (ripple/AC or whatever) when being used as a filter. This is not normally printed on the case of the cap. Typically larger (physically) caps will have a lower ESR (don't know what that stands for, but high ESR is real bad for a power supply cap). So just go for the same voltage, lower ESR (or physically larger package, or labeled "for power supplies". Charles Marslett chasm@killer.dallas.tx.us