Hello, --- On Sat, 12/29/12, Doug McNutt <[email protected]> wrote:
> And while I'm at it, Apple's choice of aluminum > electrolytics seems to have used a lot of caps rated at 16 > volts where a 6 volt rating would be good enough. It's > likely a perceived saving in parts where variety makes > automated assembly more difficult. > > Six volt tantalums are cheaper and smaller if you can > separate the 12 volt bus from the 5 volt bus. I'll bite: when you say "cheaper," are you talking on an industrial scale (like Apple would use) or on a (typical) hobbyist's scale? I ask because, just out of curiosity, I pulled up an old post that listed the caps that Jeff Walther was offering a couple of years back (NB: circa 2010; he may or may not be offering the same selection in 2012) and didn't see any caps with less than a 16V rating: >Surface Mount (tantalum): >47 uF 16V AVX TAJD476K016R Size D >1 uF 35V KEMET T491B105M035 Size B >10 uF 20V AVX TAJB106M020RNJ Size B >Axial (with leads coming out the ends): >220 uF 35V Axial Electrolytic Capacitor. >470 uF 16V, 105C Axial Electrolytic Capacitor (approx. 3/4" long X >3/8" diameter) >470 uF 50V, 105C Axial Electrolytic Capacitor (approx. 1" long X >1/2" diameter) ...so I'm guessing the savings you refer to are negligible (i.e. less than $1) when you're talking about such components in small (i.e. a hobbyist needing to recap a single board) quantities? Just wondering. Best, James Fraser -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/
