- ***BANG!*** - 2 Updates
- Nylon gear adhesive - 1 Update
| John-Del <ohger1s@gmail.com>: Nov 11 04:48AM -0800 On Sunday, November 10, 2019 at 6:33:20 PM UTC-5, Fox's Mercantile wrote: > Capacitors across the power line, when they fail, they fail > spectacularly. And usually fast enough that they don't always > take out the line fuse. Back in the mid to late 60s, RCA used a .1uf cap right across the AC interlock. They would let go on occasion and fail, well, spectacularly. They would blast bits of metal and tons of carbon under the whole chassis. Because they were wired before the breaker, they kept going until the house fuse blew or they spent their mass. RCA recalled them and I remember putting in several hundred replacement caps through the 70s. Back then, most TVs weren't registered with the manufacturer and without internet, it was difficult getting consumers aware of the issue. But whenever we'd see one (dark brown), we'd automatically replace it with the revised cap. |
| Cursitor Doom <curd@notformail.com>: Nov 11 04:25PM On Mon, 11 Nov 2019 04:48:42 -0800, John-Del wrote: > interlock. They would let go on occasion and fail, well, spectacularly. > They would blast bits of metal and tons of carbon under the whole > chassis. Hmmm. Amazing a little .1uF cap could make that much noise! I freely admit I've never been in the same room when a cap let-go, so have only ever heard them from some way off. I really should blow some up on purpose so I know for myself; that's an essential part of my education that's been missing all these years. Is the violence you get commensurate with the capacity? Say for example I blow up a 10,000uF electrolytic on purpose, is it a *much* bigger deal than say a 25uF one? What does the noise approximate to - as much as a pistol shot? -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this manner via non-Usenet protocols constitutes acceptance of this condition. |
| Fletcher <fletcherfletch@example.com>: Nov 11 05:49AM -0500 Sometime around Sun, 10 Nov 2019 22:42:59 -0500, Fred McKenzie <fmmck@aol.com> wrote..... > I see various replacement gear prices ranging from $7 to $21. > I also see someone selling a "parts only" model 17 that needs a new gear! > Fred It's a Boston Model 18 Electric Pencil Sharpener 296A/ I've never bought nor sold anything on Ebay. I generally disassemble broken devices & keep what's re-usable. Nothing much seems re-usable except the power cord though (and I have a box full of those already). |
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