Or sometimes, just to get your attention, they will short out then explosively go open with a bang. The is usually no doubt figuring out which component is bad.
On Sun, Apr 19, 2020, 19:56 Christopher Hoover <[email protected]> wrote: > opens in my limited experience. > > On Sun, Apr 19, 2020 at 4:26 PM Adrian <[email protected]> wrote: > > > When you say 'blow' are you saying it short circuits internally or open > > circuits internally due to the event ? > > > > > > Adrian Fewster > > > > On 20/4/20 8:07 am, Christopher Hoover wrote: > > > You might want to replace the bridge rectifier in that new 35A power > > supply. > > > > > > Yep, right out of the box. > > > > > > At some point, Astron started shipping RS-35A's with a 25A bridge > > > rectifier. They paralleled two out of four of the 25A diodes twice > over > > > to make, supposedly, a pair of 50A diodes for center-tapped full-wave > > > rectification. That's not good engineering practice as the diodes in > > each > > > pair will not share current equally because of differences in Vf and > > > tempco. Once one blow, the other will blow shortly after. > > > > > > After I fixed my own RS-35A with this problem, I've helped several > other > > > hams fix this same problem in theirs. Not a random sample, as this is > > just > > > folks on my local machine and in local clubs. > > > > > > You can get a 50A bridge in the same package for under $3. > > > > > > Perhaps Astron has fixed the problem since .... > > > > > > 73 de AI6KG -ch > > > > > > > > > > > > > > > On Thu, Apr 16, 2020 at 10:28 AM Ray Albers <[email protected]> > wrote: > > > > > >> Many to all who posted/responded to my recent post about an > electrolytic > > >> capacitor failure in my power supply. Lots of very interesting > reading > > >> about peoples' industry experiences - thank you! > > >> > > >> Several have pointed out that using a 20A supply with my K3/100 is > > pushing > > >> close to (or over!) the limit. Even though I am measuring just 16A at > > the > > >> power level I'm running (and not running anything but the K3 on this > > >> supply) I agree that I'm skirting the edges. So even though I've been > > >> getting away with it for a long time, this morning I ordered a 35A > > supply. > > >> I'll probably sleep better. > > >> > > >> 73 > > >> Ray K2HYD > > >> > > >> < > > >> > > > https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon > > >> Virus-free. > > >> www.avast.com > > >> < > > >> > > > https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link > > >> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > > >> ______________________________________________________________ > > >> 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 > > >> Message delivered to [email protected] > > >> > > > ______________________________________________________________ > > > 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 > > > Message delivered to [email protected] > > > > > ______________________________________________________________ > > 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 > > Message delivered to [email protected] > ______________________________________________________________ > 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 > Message delivered to [email protected] > ______________________________________________________________ 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 Message delivered to [email protected]
