Timeline for Performance changes to metal can transistors installed 40 years ago
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 26, 2020 at 13:35 | vote | accept | Bort | ||
| Feb 26, 2020 at 6:40 | comment | added | Russell McMahon♦ | @schadjo Yes - tin whisker growth is often (always?) independent of powering. Here are many examples - powered and otherwise. | | |
| Feb 25, 2020 at 20:50 | history | edited | Bort | CC BY-SA 4.0 |
edited title
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| Feb 25, 2020 at 20:50 | comment | added | Bort | @RussellMcMahon, Thanks for the input. Tin whiskers will grow without the unit being powered? I've seen tin whisker issues with RoHS solder, but in more or less constantly powered devices. I am no tin whisker expert. | |
| Feb 25, 2020 at 20:37 | comment | added | Russell McMahon♦ | 1. "NB: This is 'out of my head' - it makes sense to me based on 'stuff I have seen' over decades but has no formal basis: Hermetically sealed" components may have been 'challenged' over that time period. "Baking it gently" may be in order. Not so got as to damage any components, but towards the upper end of its rated storage temperature range. Even maybe in two stages - first a somewhat above ambient for hours to some days, then hotter. || 2. Rub the cans gently with fingertip and fingernail end. Do they have a rough 'lumpy' feel. Tin whiskers will grow in well under that time and vary ... | |
| Feb 25, 2020 at 19:55 | answer | added | Phil G | timeline score: 2 | |
| Feb 25, 2020 at 19:38 | comment | added | anrieff | Was it tested recently? Any issues present? | |
| Feb 25, 2020 at 19:16 | history | asked | Bort | CC BY-SA 4.0 |