Discharge the cap BEFORE trying to tighten or loosen the screws.
________________________________ From: Vic K2VCO <[email protected]> To: [email protected] Sent: Thursday, October 17, 2013 3:37 PM Subject: Re: [Elecraft] K3 suddenly dies Sometimes the screws holding the board to the capacitors loosen up after a few years. On 10/17/2013 7:14 AM, Gary, W7TEA wrote: > Good morning Don. The PS suddenly died on me at our beach house in Long > Beach. I had > no equipment there and first assumed it was my K3. Brought the rig home to > Portland > and it worked fine. So, it was the supply, an Astron RS35A--couple years > old. Anyway, > checked the fuse, cleaned contacts etc and it was .8v at the terminals. . > So, I > replaced the voltage IC which I got from Mouser and used Deoxit on the the > voltage > adjustment pot. I have another RS35A which has run fine for over 30 years. > > I don't feel comfortable playing around inside a live supply but will take > the cover > off and do another visual inspection while unplugged. It has to be something > simple I > would think. > > thanks Don, Gary W7TEA > > > > > On Oct 17, 2013, at 5:42 AM, "Don Wilhelm-4 [via Elecraft]" > <[email protected]> wrote: > >> You did not show any of the prior information (one of the problems with >> posts from >> Nabble), so I can only guess that you are working with a power supply >> problem. A >> situation like that is often caused by something loose in the negative side >> of the >> supply, something that is frequently overlooked. >> >> 73, Don W3FPR >> >> On 10/17/2013 1:54 AM, Gary, W7TEA wrote: >>> Well, traded out the voltage regulator IC and no joy. Then I tried Deoxit >>> on the >>> adjustment pot, tweaked it a bit and measured voltage at 13.8vdc! Great! >>> Turned it >>> off and on, tried it again, and was ready start bragging to the XYL---but >>> it was >>> back to .8v. Didn't see any suspect components while I had it open. >>> -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
