On Fri, 26 Aug 2016 20:08:54 -0700 (PDT), Len Ovens wrote: >On Sat, 27 Aug 2016, Ralf Mardorf wrote: > >> On Fri, 26 Aug 2016 17:51:25 -0400, jonetsu@xxxxxxxxxxxx wrote: >>> On Fri, 26 Aug 2016 22:50:27 +0200 Ralf Mardorf wrote: >>>> Why isn't it happening all the times, if the capacitors are dried >>>> out? >>> There would be a transition time I think. >> >> This could be possible. >> >> If they are dried out, then capacitance got lost. If the the oxide >> coating is broken, they short. >> >> What is a capacitor used for, that could cause delayed trouble, if >> it's broken, instead of causing the trouble all the times? >> >> IIUC you hear the crackling only, if there is an audio signal, >> there's no crackling, without an audio signal. > >This page indicates that the power supply caps.... well the whole >power supply, is less than adequate already. Again guessing. This card is not an amplifier that requires a big reliable power supply, neither it's comparable to a CRT, that has got a high power consumption. I do not own this card, so I ask questions to perhaps provide more than just guessing. I didn't find a circuit layout, but already tried to read on a photo what is printed on the large TO-220 package component. I didn't find a photo where I could read what's printed on it, but while searching such a photo, I found this https://offog.org/notes/delta-1010lt-repair/ So the two capacitors close to the large TO-220 package component are reservoir capacitors. Note, my PCI Envy24 cards have a voltage regulator were the delta seems to have one, too. At the further end of the large TO-220 package component, there are two small capacitors and something that looks like a miniature edition of a TO-220 package. On my cards it's a 1117 voltage regulator. However, assuming that the provided power by the computer's power supply should be too fluctuating, to feat the stabilisation of the delta, I would suspect more dramatic effects. If the stabilisation should be the reason for the issue, then I would expect broken capacitors on the audio card. Regards, Ralf _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
