I had (well, sorta still have) a IIci and a IIcx I picked up some years back at a thrift store cheap. Unfortunately that was before I learned of the dangers of leaking batteries...you can probably guess where this is leading...not much left of them. More recently I got a IIcx motherboard from someone and re-capped it, but still couldn't get it to work...gave up on it for the time being. Might have to take another stab at it some day...but not sure what else to try. As I recall, the only real difference in the II's and 700 is that the II's are set up to be in desktop orientation and the 700 as a tower? All personal preference... :-) I have re-capped a couple of old Macs, mainly LC and LCII's so far. I found that the MLCC (multilayer ceramic) capacitors work very well. Nice and small (but not too small) with plenty of pad on the board to make them very easy to solder on. Also no polarity to worry about. Sounds like they may be more reliable than even the tantalum capacitors. I know what you mean, shipping is the worst part! The last ones I got I picked some up from ebay...US sellers selling some off of a reel or whatever...prices and shipping both better than from Mouser/Digikey/etc. Wesley
_____ From: vintage-macs@googlegroups.com [mailto:vintage-macs@googlegroups.com] On Behalf Of Thomas Pfaff Sent: Wednesday, July 15, 2020 8:01 PM To: vintage-macs@googlegroups.com Subject: Re: Apple Mac Quadra 700 Hi. Yep am planning on moving to tantalum in my IIci. I understood your reply completely... so thank you! When I worked at Ample Computerz I bought a Quadra 900 among other machines... they were cheap for employeez. Turned out they were cheap all around- the case was always falling apart and meh... so I had planned on getting a Quadra 700 myself. I quit working there out of disgust.... gravitated to NeXT work afterward coz both their hardware+OS software was so much better. Not to mention NeXT programmers did less work and were paid a lot more than their Mac counterparts, by and large, due to the scarcity of Objective-C developers. Anyway, I found a IIci for next to nothing recently, then remembered the first Mac I did engineering work on was a IIci (at Everex) and kinda fell in love with it. I like the case better than the Quadra 700... even tho' they are nearly identical. It's like the Star Trek where Spock says to the two identical chick robots, "I love you... but I hate you!" Or something like that. Hmm. I don't hate the 700 tho'. :-) I do prefer the IIfx and the IIci models right now. I have a tentative order in at Mouser for tantalum caps but want to line up a few more projects coz of the shipping costs! Hope I can get that machine working by January. Incidentally, does anyone have a installed image of A/UX 3.0? A/UX 2.0? I was stupid enough to sell my copy of both, which I got when I was at Ample. That's what I really want to run again on my Mac II series models. A/UX 3.x runs zippity quick on the Quadras but just think the earlier models are cuter. Thomas On Wed, Jul 15, 2020 at 12:35 PM <wes...@megley.com> wrote: I have a Q700 I picked up at a recycling center and tried a while back to get working, but didn't have any luck, but also didn't spend much time on it, could be a bad power supply. At any rate, my recollection is that on the one I had at least, the capacitors on the motherboard were all the yellow tantalum capacitors, not the silver can electrolytic type that fail and leak in the well-known fashion. Tantalum capacitors can fail too, I have seen it happen on at least two older PC's (I assume it could happen on Macs too)...and they either fail silently and likely short out, or they can explode (blow the top off) in an impressive pop...I have observed one of each, and when they blow, they get your attention. :-) But to your original question, if it is like mine, and I'm guessing it would be, they are the more reliable tantalum capacitors that should not need replacement. Wesley Quoting Thomas Pfaff <tpfaff...@gmail.com>: > Curious... do you know if the capacitors on the Quadra 700 mamaboard do > better than the ones in the IIci and such? Capacitors from the pre-china > days tend to have very long lifespans but Apple got an early start on > shipping "lesser componentry" on their boards. > > Thomas -- -- ----- 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 vintage-macs@googlegroups.com To leave this group, send email to vintage-macs+unsubscr...@googlegroups.com <mailto:vintage-macs%2bunsubscr...@googlegroups.com> For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/ --- You received this message because you are subscribed to the Google Groups "Vintage Macs" group. 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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 vintage-macs@googlegroups.com To leave this group, send email to vintage-macs+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/ --- You received this message because you are subscribed to the Google Groups "Vintage Macs" group. To unsubscribe from this group and stop receiving emails from it, send an email to vintage-macs+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/vintage-macs/F3FDC4A476674F8CAAEC36C1A409158F%40wesley7.
