@Eric & others Good news, everyone. ;-)
I found the hardbound volume in question, and it does have a very interesting and detailed discussion of aluminum electrolytics, and the Mallory FP series in particular. But my memory is a little hazy, and I'm not sure this is the +exact+ article I had in mind when I raised the subject. It may be, but I remain somewhat unsure. But happily, I did a little searching and it turns out that the entire doc is available online via Cornell U and Google books. How cool! Here's the link: http://babel.hathitrust.org/cgi/pt?id=coo.31924004669861 Take a look at Section 9 for the primary capacitor articles. Meanwhile, I'll keep my eye out for any other docs, I have a hunch there's another one in the "library".. On Fri, Jul 31, 2015 at 12:43 PM, Robert Jarratt < robert.jarr...@ntlworld.com> wrote: > > -----Original Message----- > > From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of David > > Gesswein > > Sent: 31 July 2015 02:52 > > To: cct...@classiccmp.org > > Subject: Re: Reforming capacitors (technical description, not politics) > > > > When I reformed the 1967? capacitors in MARCH's straight 8 I took some > data > > showing the improvement in leakage and also measured capacitance and ESR. > I > > couldn't find original spec for the capacitor but the values seemed > reasonable > > compared to datasheet for more recent capacitors. > > > > Graphs here. > > http://www.pdp8online.com/shows/vcfe15/slides/PDP-8_Restoration.html > > David, > > From the slides you posted it looks like you have some kind of automated > set > up. Can you explain what you have there? The limited reforming I have done > has been done manually. I also notice that you reform over quite a few > hours, but those are big caps. Not sure I have seen any suggestions over > how > long to reform for, and whether it is a function of the capacitor's nominal > capacitance. > > Thanks > > Rob > >
