Re: [LAU] Audio interface for newbies ?

On Sat, 27 Aug 2016 19:53:54 +0200, Ralf Mardorf wrote:
>More or less all the repairing I had to do myself or in some cases
>was done by a friend, within the last years, was replacing capacitors
>in new switched-mode power supplies, that were running for around 1 to
>3 years. They were simply undersized by voltage, they were neither bad
>manufactured, nor did they dry out, they bloat and short. This
>wittingly predetermined breaking point is a real plague. For example
>my Behringer Eurorack UB2442FX-Pro suffered from this issue. It's not
>just some no-name power supply, it's a Behringer designed power
>supply. ISO 9000 is fraud against customers and criminal against the
>environment, those products that failed usually advertised their
>quality management. 30 years old conventional power supplies with good
>voltage size, but aged leaking capacitors, that don't provide the
>original capacity anymore usually don't cause any issues. We usually
>don't notice that the capacitors for a lot of gear are already broken.
>Leaking isn't good, it's better to replace those capacitors, but
>leaking capacitors not that often cause noticeable issues, especially
>not the two kinds of voltage stabilizing capacitors, either smoothing
>capacitors (Glättungskondensatoren) and bulk capacitors, decoupling
>capacitors or what ever you name (Stützkondensatoren) capacitors for
>stabilisation. Yes, if they aren't good anymore, they could cause
>disastrous effects, but I suspect they are broken for a long time
>without causing a noticeable effect and if the effect becomes
>noticeable, than I suspect that it's more or less always noticeable
>and not just by random.
>
>YMMV!
>Ralf

PS: Not to mention that the more important bulk capacitors aren't
electrolytic ;).
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Received on Sun Aug 28 16:15:04 2016