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Hi Greg,
I totally agree with you, Safety First. I'm reworking a prototype board, it requires I use the dremmel to cut traces and drill new holes. I can't do this work with my glasses, so I put on safety goggles. I would feel real stupid for the rest of my life if I hurt my eye(s) because I didn't take 5 seconds to put on some proper eye protection. You are right about Tantalums having tantrums! Not long ago, I had a transistor blow up on me too. I was fixing an HP9825 and took a TO92 transistor out of circuit for some tests.... well, after I soldered it back in, it blew up! The heat of my soldering iron (which is a regulated Weller station) damaged the transistor. My advice to everyone... don't forget that back then, we used to use pliers or surgical clamps to heat sink the transistor leads. There are probably many other ways of being safe... I'll leave the door open for a new thread... Cheers, Josh > Date: Sun, 22 Feb 2015 07:56:00 -0800 > From: gregor...@gmail.com > To: n8vem...@googlegroups.com > Subject: RE: [N8VEM-S100:6405] Discussion About Filter Capacitors > > Josh, > > Some of the repairs that I have performed over past 2 decades, were dead communication modems, etc. > that would not power on. > Many of these items were first generation users of the 7805 for +5 V rail regulation. > Often the regulator itself would be dead, but on a few occasions I would find 2 leads above PC board where the > tantalum capacitor use to be located. > In one modem, I found the top of the capacitor -- it had launched off the PC board, when it failed. > --- > Safety glasses are always recommended on live testing, on the workbench. > I had one tantalum fail, while modem was energized on the workbench -- it launched and hit the shop ceiling ! > > greg > > -- > You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an email to n8vem-s100+...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. |