Edgar Posted May 22, 2020 Share Posted May 22, 2020 Note to self: If you charge an electrolytic capacitor on Wednesday, it will still hold enough charge on Friday to arc-weld the screwdriver that you accidentally short across its terminals. Quote Link to comment Share on other sites More sharing options...
Bosco-d-gama Posted May 22, 2020 Share Posted May 22, 2020 Shocking.... 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted May 22, 2020 Share Posted May 22, 2020 In the far distant past, I worked a a TV station in central Illinois. The assinstant chief engineer would go into the workshop and take a huge cap out of the box and use clip leads to connect the cap to the 115 vac. It would quickly charge, and he would put it back in the box.Later, the chief would come in and grab the box, open the top, where the solder tabs were located... and slide it out onto his palm. BAM!! You just know that had to hurt. 1 Quote Link to comment Share on other sites More sharing options...
jason str Posted May 22, 2020 Share Posted May 22, 2020 23 minutes ago, Marvel said: In the far distant past, I worked a a TV station in central Illinois. The assinstant chief engineer would go into the workshop and take a huge cap out of the box and use clip leads to connect the cap to the 115 vac. It would quickly charge, and he would put it back in the box.Later, the chief would come in and grab the box, open the top, where the solder tabs were located... and slide it out onto his palm. BAM!! You just know that had to hurt. I did something similar when i replaced points and condenser on older vehicles, a bit of charge and leave the stuff on a workbench and the new guys never knew what hit them. 2 Quote Link to comment Share on other sites More sharing options...
Edgar Posted May 22, 2020 Author Share Posted May 22, 2020 In my case I did it to myself. I know better. A moment's inattention and, as @Marvel said: "BAM!!" Quote Link to comment Share on other sites More sharing options...
babadono Posted May 22, 2020 Share Posted May 22, 2020 Did it leave a mark? Cap ruined? Screwdriver? Quote Link to comment Share on other sites More sharing options...
babadono Posted May 22, 2020 Share Posted May 22, 2020 Caps charged with AC....Hmmmm..so does the arc go in both directions? Quote Link to comment Share on other sites More sharing options...
MC39693 Posted May 22, 2020 Share Posted May 22, 2020 In high school I worked for the science department... the other guys (never me) connected a van de Graaf generator to a steel door and called one of the other student techs... BAM, blew the heel off his shoe. Lucky they didn’t kill him. Quote Link to comment Share on other sites More sharing options...
babadono Posted May 22, 2020 Share Posted May 22, 2020 Not shocking but..... Had/have an old friend who was very inquisitive. Used to wind his own Tesla coils. How freaky it was, just pickup a florescent tube and walk around with it. It would light up using your body as the ground. And you couldn't feel anything. Weird. Quote Link to comment Share on other sites More sharing options...
Edgar Posted May 22, 2020 Author Share Posted May 22, 2020 16 minutes ago, babadono said: Did it leave a mark? Cap ruined? Screwdriver? None of my skin was involved in the incident. Thanks for your concern. Cap seems OK. It is a power supply cap in a medium-power amplifier that I am rebuilding, so it was only charged originally to 46VDC. After two days it was probably down to 20V, which was still enough to put on a good display of sparks. I have other screwdrivers. Quote Link to comment Share on other sites More sharing options...
dirtmudd Posted May 22, 2020 Share Posted May 22, 2020 2 hours ago, Edgar said: Note to self: If you charge an electrolytic capacitor on Wednesday, it will still hold enough charge on Friday to arc-weld the screwdriver that you accidentally short across its terminals. 1 Quote Link to comment Share on other sites More sharing options...
Edgar Posted May 22, 2020 Author Share Posted May 22, 2020 I didn't know that Jack Nicholson rebuilt amplifiers! Quote Link to comment Share on other sites More sharing options...
dirtmudd Posted May 22, 2020 Share Posted May 22, 2020 3 minutes ago, Edgar said: I didn't know that Jack Nicholson rebuilt amplifiers! but Juck liked using electrolytic capacitors Quote Link to comment Share on other sites More sharing options...
Bosco-d-gama Posted May 22, 2020 Share Posted May 22, 2020 41 minutes ago, dirtmudd said: I attended several electroconvulsive treatments long ago. They do sedate the patient but the procedure itself looks pretty rough. But they woke up happier. Quote Link to comment Share on other sites More sharing options...
JJkizak Posted May 22, 2020 Share Posted May 22, 2020 46 minutes ago, Bosco-d-gama said: I attended several electroconvulsive treatments long ago. They do sedate the patient but the procedure itself looks pretty rough. But they woke up happier. It's a good thing they used happy electrons instead of sad ones. JJK Quote Link to comment Share on other sites More sharing options...
Bosco-d-gama Posted May 22, 2020 Share Posted May 22, 2020 2 minutes ago, JJkizak said: It's a good thing they used happy electrons instead of sad ones. JJK They do ECT to treat depression. Unsure how or why it works....... but it does. I was just there ‘in case’ something went sideways. Quote Link to comment Share on other sites More sharing options...
JJkizak Posted May 22, 2020 Share Posted May 22, 2020 1 minute ago, Bosco-d-gama said: They do ECT to treat depression. Unsure how or why it works....... but it does. I was just there ‘in case’ something went sideways. I was just a funnin you. JJK 1 Quote Link to comment Share on other sites More sharing options...
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