- Special for Jeff in Ranger! - 5 Updates
- Contact cleaner for TEK 465B? - 5 Updates
- voltage doubler - 1 Update
| "pfjw@aol.com" <peterwieck33@gmail.com>: Oct 29 12:49PM -0700 https://www.wd40specialist.com/products/contact-cleaner?specialist=GoogleCleanserDegreaser&gclid=CjwKCAjw39reBRBJEiwAO1m0Ocrfm4KkPCJo8D7c0wLHeiHJ7PqQRs4pTnlrlMDl3hcp4AA5T-SPAxoC_r4QAvD_BwE Peter Wieck Melrose Park, PA |
| Jeff Liebermann <jeffl@cruzio.com>: Oct 29 02:03PM -0700 On Mon, 29 Oct 2018 12:49:37 -0700 (PDT), "pfjw@aol.com" >https://www.wd40specialist.com/products/contact-cleaner?specialist=GoogleCleanserDegreaser&gclid=CjwKCAjw39reBRBJEiwAO1m0Ocrfm4KkPCJo8D7c0wLHeiHJ7PqQRs4pTnlrlMDl3hcp4AA5T-SPAxoC_r4QAvD_BwE >Peter Wieck >Melrose Park, PA <https://www.wd40specialist.com/products/contact-cleaner> <https://www.wd40company.com/files/pdf/sds/specialist/wd-40-specialist-electrical-contact-cleaner-spray-us-ghs.pdf> n-Hexane 110-54-3 20-30% Isopropyl Alcohol (Isopropanol) 67-63-0 10-20% 1,1 Difluoroethane 75-37-6 40-60% n-Hexand and isopropyl alcohol are solvents normally used to remove grease and oil. n-Hexane is found in some foods, so the FDA has declared it to be food safe. It's also found in gasoline, which is not so safe. Little wonder it's listed as "fast drying" which should be "fast evaporating". 1,1 Difluoroethane is the propellant gas. It's basically an alcohol and solvent spray. No oxide remover means you get to rub off any oxide coating by hand. Also, no tarnish remover. Cost $7 for 11 oz (400ml). The other Jeff. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| Fox's Mercantile <jdangus@att.net>: Oct 29 06:40PM -0500 On 10/29/18 4:03 PM, Jeff Liebermann wrote: > remover. > Cost $7 for 11 oz (400ml). > The other Jeff. What a surprise, WD-40 makes yet another useless product. No thanks, I'll stick with my De-Oxit, Fader Lube and Pro-Gold. The other other Jeff. -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Oct 30 08:40AM -0700 I guess it takes a while for the leg to pull from Ranger to Melrose Park. Peter Wieck Melrose Park, PA |
| Fox's Mercantile <jdangus@att.net>: Oct 30 10:48AM -0500 > I guess it takes a while for the leg to pull from Ranger to Melrose Park. > Peter Wieck > Melrose Park, PA Yank yank -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
| "~misfit~" <shaun.at.pukekohe@gmail.com>: Oct 30 12:47PM +1300 Once upon a time on usenet gregz wrote: >> Eric > Some cam switches I think I just used alcohol. I never did, pbut > thinking of lube or cleaner lube, I love CRC 2-26. I'll second the 2-26. It's the aerosol can I'd least like to do without for electronics work. -- Shaun. "Humans will have advanced a long, long way when religious belief has a cozy little classification in the DSM*." David Melville (in r.a.s.f1) (*Diagnostic and Statistical Manual of Mental Disorders) |
| Jeff Liebermann <jeffl@cruzio.com>: Oct 29 07:03PM -0700 On Tue, 30 Oct 2018 12:47:40 +1300, "~misfit~" >> thinking of lube or cleaner lube, I love CRC 2-26. >I'll second the 2-26. It's the aerosol can I'd least like to do without for >electronics work. Ok, let's see what you get for your money with CRC 2-26: <https://www.crcindustries.com/products/2-26-174-multi-purpose-precision-lubricant-16-fl-oz-02007.html> <http://docs.crcindustries.com/msds/2007.pdf> Chemical Name CAS No % Distillates (petroleum), 64742-47-8 70 - 80 hydrotreated light Light mineral oil 8042-47-5 10 - 20 n-Butyl stearate 123-95-5 3 - 5 Fatty Acids, C18-unsatd, 61788-89-4 1 - 3 Dimers Petrolatum 8009-03-8 1 - 3 Nice job of obfuscating the actual contents, but the CAS numbers should produce something helpful. Looks like it's mostly light petroleum distillate, which means kerosene (paraffin) or something similar. Kerosene can be both a solvent and a lubricant. Light mineral oil probably means light mineral oil or white paraffin oil. Yet another lubricant. n-Butyl stearate is a fatty acid based on zinc. It's food safe and kinda waxy. My guess is that it acts as a coating over the contacts to prevent further oxidation. Fatty Acids, C18-unsatd, dimers. C18 would be oleic or possibly linoleic acid. I would guess linoleic acid which is a quick drying oil. It reacts with oxygen in the air to form a protective coating. Petrolatum is another name for petroleum jelly or something similar. No clue what it's doing in the mix. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| Phil Allison <pallison49@gmail.com>: Oct 29 10:35PM -0700 Jeff Liebermann wrote: > >I'll second the 2-26. It's the aerosol can I'd least like to do without for > >electronics work. > Ok, let's see what you get for your money with CRC 2-26: https://www.crcindustries.com/products/2-26-174-multi-purpose-precision-lubricant-16-fl-oz-02007.html http://docs.crcindustries.com/msds/2007.pdf ** OMG !!! CRC 2-26 now comes in a big, plastic hand sprayer - like weed killer. .... Phil |
| gregz <zekor@comcast.net>: Oct 30 07:49AM > ** OMG !!! > CRC 2-26 now comes in a big, plastic hand sprayer - like weed killer. > .... Phil My first purchase was large can 12 oz. ? home Depot for about $4, then they just had smaller cans for MORE money. Greg |
| Jeff Liebermann <jeffl@cruzio.com>: Oct 30 08:37AM -0700 On Mon, 29 Oct 2018 19:03:50 -0700, Jeff Liebermann <jeffl@cruzio.com> wrote: (...) >oil. It reacts with oxygen in the air to form a protective coating. >Petrolatum is another name for petroleum jelly or something similar. >No clue what it's doing in the mix. I have a guess(tm) as to why the petroleum jelly. It evaporates, but much slower than linoleic acid, which turns to goo as soon as it hits the air. That might clog the nozzle of the pump type spray bottle. Mixing with petroleum jelly should slow down the reaction so that it turns to goo after it's sprayed on the parts that needs lubrication or rust protection. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Oct 29 10:34AM -0700 To elaborate just a bit on Phil's correct answer: Hot to hot = doubled voltage. Hot-to-ground = half-voltage. https://img.bhs4.com/e7/1/e71df333b176823b913fdddc802d6fc749bce9a5_large.jpg One side will be - to ground +. One side will be + to ground -. To see this in action - exactly this - look at the filament voltage schematic for a Dynaco PAS. As these are all dumb components, loading does not change anything - to the capacity of the source in any case. Peter Wieck Melrose Park, PA |
| You received this digest because you're subscribed to updates for this group. You can change your settings on the group membership page. To unsubscribe from this group and stop receiving emails from it send an email to sci.electronics.repair+unsubscribe@googlegroups.com. |
No Response to "Digest for sci.electronics.repair@googlegroups.com - 11 updates in 3 topics"
Post a Comment