Next time I find a hopelessly stubborn item to solder, I'm going to get my version of "The Holy Hand Grenade of Antioch" -- acid-core solder. I've always wanted to know if the corrosive flux can be safely and adequately removed, and possibly over-coated with rosin-based solder.
I rarely use this stuff; in the past it's always been for steel parts but that ended when I got an oxyacetylene torch and now I just braze those items. [image: Image result for holy hand grenade picture] On Tuesday, May 2, 2023 at 6:59:19 AM UTC-7 padlernped...@gmail.com wrote: > Ditto on the stranded copper wire. One of the most frustrating things and > almost impossible to clean the strands well enough for the solder to wet > and make a reliable connection. > > Randy > > On May 1, 2023, at 4:58 PM, gregebert <greg...@hotmail.com> wrote: > > Usually when I cant solder something it's because there is too much > surface oxidation. Some of it gets so bad that rosin-based flux wont > dissolve it, so the next step is to scrape it off with sandpaper, or a > dremel tool. > > > So far, the worst I've encountered are > > - Oxidized copper leads on bulk neon bulbs from China > - Lugs on very old switches, pots, and lamp sockets that were not > previously soldered > - Really old resistors that were never used.....from the 1950s and > 1960s > - Stranded copper wire that mysteriously corroded *beneath* the > insulation. I suspect there was a slow chemical reaction between the > copper > and something that outgassed from the plastic insulation. > > > On Sunday, April 30, 2023 at 2:00:24 PM UTC-7 Paul Andrews wrote: > >> Interesting. Maybe time to break the flux out? Works for me on old radios. >> >> On Apr 29, 2023, at 12:37 PM, Batareyka <batar...@gmail.com> wrote: >> >> >> >> >> mth-90 used solder with a high lead content. Therefore, for a long time >> of non-use, the balls on the legs of the solder oxidize and form a rather >> large film of oxide that prevents the metal itself from melting. >> To do this, you need to remove the plaque to a shiny with anything, a >> file or a knife. >> And after that, everything is soldered quite easily. >> суббота, 29 апреля 2023 г. в 19:31:58 UTC+3, Jasper nagle: >> >>> Maybe I have another go at the blobs tomorrow on a few different tubes >>> I’ll see if age makes a difference >>> >>> On Sun, 30 Apr 2023 at 12:23 am, Yohan Park <w...@kitsunegari.net> >>> wrote: >>> >>>> Just tried with my iron set to the highest temperature (480C/896F), >>>> added lead based solder to try to make it going but nothing happened. >>>> So either you're soldering at insanely high temperatures or they've >>>> used different materials over the years... :) >>>> >>>> On Saturday, April 29, 2023 at 2:01:11 PM UTC+2 Jasper nagle wrote: >>>> >>>>> I was able to melt the blobs on the mtx-90 with a soldering iron so it >>>>> must be something like tin or lead >>>>> >>>>> On Sat, 29 Apr 2023 at 7:56 pm, Yohan Park <w...@kitsunegari.net> >>>>> wrote: >>>>> >>>>>> No that's not true. It's not solder but a different metal (can't >>>>>> recall what it is) to make it easy to solder. You won't be able to melt >>>>>> the >>>>>> blobs with your soldering iron though. >>>>>> >>>>>> On Friday, March 24, 2023 at 1:10:31 PM UTC+1 Paul Andrews wrote: >>>>>> >>>>>>> I had read that the little balls on the ends of the leads are >>>>>>> solder. Is that not true? >>>>>>> >>>>>>> On Friday, March 24, 2023 at 7:17:05 AM UTC-4 Jasper nagle wrote: >>>>>>> >>>>>>>> thanks for that >>>>>>>> >>>>>>>> On Fri, Mar 24, 2023 at 7:01 PM Batareyka <batar...@gmail.com> >>>>>>>> wrote: >>>>>>>> >>>>>>>>> H3PO4 >>>>>>>>> or >>>>>>>>> H3PO4 + HCl (10:1) >>>>>>>>> >>>>>>>>> пятница, 24 марта 2023 г. в 12:33:31 UTC+2, Jasper nagle: >>>>>>>>> >>>>>>>>>> tubes im having no luck putting tin to them i even managed to tin >>>>>>>>>> the painted surface i was working on in the process >>>>>>>>>> >>>>>>>>> -- >>>>>>>>> You received this message because you are subscribed to a topic in >>>>>>>>> the Google Groups "neonixie-l" group. >>>>>>>>> To unsubscribe from this topic, visit >>>>>>>>> https://groups.google.com/d/topic/neonixie-l/nDLLgyjpV_I/unsubscribe >>>>>>>>> . >>>>>>>>> To unsubscribe from this group and all its topics, send an email >>>>>>>>> to neonixie-l+...@googlegroups.com. >>>>>>>>> To view this discussion on the web, visit >>>>>>>>> https://groups.google.com/d/msgid/neonixie-l/f43249af-46d4-45a3-8dcc-275f0e4ad43en%40googlegroups.com >>>>>>>>> >>>>>>>>> <https://groups.google.com/d/msgid/neonixie-l/f43249af-46d4-45a3-8dcc-275f0e4ad43en%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>>>> . >>>>>>>>> >>>>>>>> -- >>>>>> You received this message because you are subscribed to a topic in >>>>>> the Google Groups "neonixie-l" group. >>>>>> To unsubscribe from this topic, visit >>>>>> https://groups.google.com/d/topic/neonixie-l/nDLLgyjpV_I/unsubscribe. >>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>> neonixie-l+...@googlegroups.com. >>>>>> >>>>> To view this discussion on the web, visit >>>>>> https://groups.google.com/d/msgid/neonixie-l/2787a2fd-4b5f-4a8e-aefd-cf26604798ffn%40googlegroups.com >>>>>> >>>>>> <https://groups.google.com/d/msgid/neonixie-l/2787a2fd-4b5f-4a8e-aefd-cf26604798ffn%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>> . >>>>>> >>>>> -- >>>> >>> You received this message because you are subscribed to the Google >>>> Groups "neonixie-l" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to neonixie-l+...@googlegroups.com. >>>> To view this discussion on the web, visit >>>> https://groups.google.com/d/msgid/neonixie-l/43ffeafb-05f8-435b-8960-d70278d3746en%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/neonixie-l/43ffeafb-05f8-435b-8960-d70278d3746en%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "neonixie-l" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/neonixie-l/nDLLgyjpV_I/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> neonixie-l+...@googlegroups.com. >> >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/neonixie-l/d0826c80-f5d1-429f-885a-b8c54cbd55b9n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/neonixie-l/d0826c80-f5d1-429f-885a-b8c54cbd55b9n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+...@googlegroups.com. > > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/c9f75756-bfa4-4835-8081-f661aacfa45an%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/c9f75756-bfa4-4835-8081-f661aacfa45an%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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