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This is the second time I have seen this, both times it was a piece of tube equipment. Both times it was some problem causing a considerable B+ current draw, the diode(s) got so hot they unsolder themselves. The first time it was an HP oscilloscope and the diode unsoldered itself, fell down to the bottom of the case and the solder on the through holes re-bridged so it looked like the diode was never installed there.
The second time was yesterday, an ARC SP3 that has a lot of diodes in series to act as a fixed voltage source. This time the board was horizontal so the diode was still in place but unsoldered, with an intermittent connection.
I was curious as to how common this is. Have others run into it?
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Topic - Diodes unsoldering themselves - fredtr 06:23:24 12/29/20 (9)
- RE: Diodes unsoldering themselves - Mike B. 09:48:01 12/29/20 (1)
- RE: Diodes unsoldering themselves - John Elison 22:27:05 12/30/20 (0)
- RE: Diodes unsoldering themselves - Palustris 08:54:18 12/29/20 (2)
- RE: Diodes unsoldering themselves - rivervalley817 09:04:24 12/29/20 (1)
- RE: Diodes unsoldering themselves - Palustris 11:19:59 12/29/20 (0)
- not yet in electronics but - Story 08:11:36 12/29/20 (1)
- RE: not yet in electronics but - fredtr 10:49:52 12/29/20 (0)
- RE: Diodes unsoldering themselves - airtime 06:39:42 12/29/20 (1)
- RE: Diodes unsoldering themselves - rivervalley817 08:28:54 12/29/20 (0)
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