- Free tubes CL ad for Berkeley, Ca - 1 Update
- Printer roller rejuvenator recommendation? - 2 Updates
| Mike S <mscir@yahoo.com>: Jul 18 06:41PM -0700 https://sfbay.craigslist.org/eby/zip/d/berkeley-radio-and-tv-vacuum-tubes-1000s/7161872283.html Large box of vacuum tubes NOS. From a repair shop stored 30 years. Take all |
| John-Del <ohger1s@gmail.com>: Jul 18 12:32PM -0700 On Saturday, July 18, 2020 at 12:12:35 PM UTC-4, Brian Moore wrote: > 1cc acetone > First I scrubbed the rollers lightly with soapy water and a lint-free towel. > I mixed the above in a Dixie cup. Then I rubbed this cocktail on each roller with a Q-tip, and wiped it off with the lint-free towel within 30 seconds. Then I repeated the application, wiped clean again. I was amazed. The printer works again, it was throwing the "jam" sensor every time, because the paper wasn't advancing. I've used similar concoctions but they are all temporary. The rollers get hard and slick because the rubber is deteriorating with exposure to air (and sometimes light). Back when phono idlers became tougher to get, I used to machine down the outer hardened layer of rubber with a cutting stone. This exposed "better" material to the friction surfaces but it was still not the perfect solution - although it lasted much longer than any liquid did. Hopefully, your solution will outlast the printer. |
| whit3rd <whit3rd@gmail.com>: Jul 18 01:48PM -0700 On Saturday, July 18, 2020 at 9:12:35 AM UTC-7, Brian Moore wrote: > 1 teaspoon DOT brake fluid > 1 teaspoon naphtha (old fashioned lighter fluid) > 1cc acetone Largely, that replicates an old typewriter-platen-restore formula, adding acetone. The naphtha was solvent for typewriter ribbon ink (and early dot-matrix printers) and the DOT brake fluid was a bit of plasticizer and glycerine. I'm thinking a lighter plasticizer might work as well (Armor-All vinyl finish?). Most modern printer roller technologies are compatible with isopropanol, so the acetone might be slightly more aggressive than required. Rollers that take a glaze from paper, and a bit of dirt, take well to a scrub with green Scotchbrite with soap or alcohol. Even typewriter ink was removed (slowly) with isopropyl. A good roller cleaning should hold you for a few years. Congratulations on the careful formulation; you didn't wast time OR material! |
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