| Products > Test Equipment |
| Rigol MSO5000 Power Supply |
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| Protegimus:
Gents, please don't respond to the threadcrappers any further here. They have an agenda and that has nothing to do with improving the MSO5000 PSU. @2N3055 directly - your hysterical statements and the over complication that you seek to use in order to support your claims is laughable. I didn't come here telling people what to do, nor am I ruining my credibility by making personal insults and being passive aggressive. I'm glad Rigol have continued to make improvements to the firmware, increases the scope of what the tool can be used for. If you want to take measurements that help identify what's been done; great, go do them, but do it in your own thread. I deliberately didn't publish measurements using the 500uV range, although I do have screenshots. It's a simple low pass filter and yes it's possible to improve the performance of a low pass filter. As pointed out Rigol already bypass the 470uF capacitors, we are simply doing the same. Using SMD could offer improved results, nothing to stop you using SMD if you prefer. |
| 2N3055:
--- Quote from: Protegimus on July 09, 2023, 02:29:49 pm --- --- End quote --- So what is your agenda ?? |
| beatman:
2n3055 have you ever made test's? I mean measure components or acoustical test temperature test or sound analysis? i do all the time for years and I see only positive results when is something better soldered on circuit. we don't push here nobody to do anything only we tell our experiences the guy open the thread ask for something and get answers.one example here expensive pro power amplifier with main smps filter capacitors Daewoo brand one of them leaked.for me is unacceptable.replaced with kemet.the amp now it sounds fantastic on subwoofers.low tier caps is not for stressing things like smps.is a mater of time to goes bad |
| TurboTom:
Maybe, after the re-capping job, the scope's fan sounds better... >:D >:D |
| Protegimus:
With the foolery now out of the way let's engage on some of these ideas. Seems looking at ways to improve the PSU wasn't nonsense at all. --- Quote from: 2N3055 on July 09, 2023, 12:19:08 pm ---Did you by any chance performed frequency domain analysis so we can see what frequencies got attenuated ?? --- End quote --- No I was previously thinking in simplistic terms of DC output rather than targetting filtering. I may do this when I next open the unit to see where it's at. --- Quote from: 2N3055 on July 09, 2023, 12:19:08 pm ---... Probably few well placed SMD capacitors placed on mainboard PCB locally would be even more gain... --- End quote --- Agreed. One step at a time though - it makes sense to address the PSU first as the root, improving output quality there benefits everything down the line. --- Quote from: 2N3055 on July 09, 2023, 12:19:08 pm ---... Also why did you place TH film capacitors across the elcos instead of ceramic SMD capacitors closer to output, or closer to high current paths to minimize current loop length. --- End quote --- Rigol already decouple all supply rails with ceramic SMD capacitors on the output C in the CLC filter: They were not fitted on the input side close to the rectifiers. J5 +5V - C16 -7V - C15 +7V - C12 J4 +9V - C13 +7V - C14 +5V rail on J5 appears to be the high current rail as it has two pins on that connector. Appreciate the suggestion of using SMD instead of thin film. That may offer some further improvement. --- Quote from: 2N3055 on July 09, 2023, 12:19:08 pm ---... Did you try to put more filtering stages between PSU and mainboard? --- End quote --- No. I like the simple approach. --- Quote from: TurboTom on July 09, 2023, 07:19:44 pm ---Maybe, after the re-capping job, the scope's fan sounds better... >:D >:D --- End quote --- You should try staying quiet >:D |
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