On Sun, Apr 23, 2023, 3:56 PM W2HX via cctalk <cctalk@classiccmp.org> wrote:
> I might be concerned about putting carbon comp resistors in the dishwasher > as they are hygroscopic. > > From an Ohmite datasheet: > https://www.mouser.com/datasheet/2/303/res_od_of_oa-180619.pdf > > "Carbon composition resistors are highly hygroscopic and > changes in resistance value can occur if too much moisture is > absorbed. For this reason, it is recommended not to use water > or water-soluble solvents to clean these components. Alcohol > or hydrocarbon solvents are recommended for rinsing." > Years ago, I worked at a place that made their own boards in house. They had a dishwasher for that. They had valve on it to disconnect the water supply so they could fill it with alcohol or similar for special jobs. Warner 73 Eugene W2HX > Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos > > > -----Original Message----- > From: KenUnix via cctalk <cctalk@classiccmp.org> > Sent: Sunday, April 23, 2023 5:53 PM > To: General Discussion: On-Topic and Off-Topic Posts < > cctalk@classiccmp.org> > Cc: KenUnix <ken.unix....@gmail.com> > Subject: [cctalk] Re: flipchip cleaning and pin corrosion inhibition > > Pete, > > Did the 8E have core or solid state memory? > > Ken > > > On Sun, Apr 23, 2023 at 4:06 PM Pete Turnbull via cctalk < > cctalk@classiccmp.org> wrote: > > > On 23/04/2023 17:54, Fritz Mueller via cctalk wrote: > > > > > I’ve been eying the dishwasher, for the subset of flip chips that > > > that > > are just DIP logic, carbon comp resistors, and ceramic bypass caps, > > anyway. But I haven’t been brave enough to try that yet... Most of the > > logic here has date codes to ’68 or ’69, so I’m inclined to treat it > > gently. Any suggestions for approaches to clean this up? > > > > I've used the dishwasher on a collection of PDP-8/E boards with success. > > Avoid the hot drying cycle, and don't use a harsh dishwasher > > detergent; some are quite caustic. > > > > -- > > Pete > > Pete Turnbull > > > > > > -- > End of line > JOB TERMINATED Okey Dokey >
