opens in my limited experience. On Sun, Apr 19, 2020 at 4:26 PM Adrian <vk4...@gmail.com> 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 <rayalb...@gmail.com> 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:Elecraft@mailman.qth.net > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > >> Message delivered to c...@murgatroid.com > >> > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to vk4...@gmail.com > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to c...@murgatroid.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
