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Search: Posts Made By: Per Hansson
Forum: General Electronics Technical Discussion Yesterday, 10:18 PM
Replies: 13
Views: 163
Posted By Per Hansson
Re: Motor run capacitor physical size vs voltage rating & measurements?

budm: Thanks for that link, yes I understood why you where after the center tap point.

redwire: It did not trip a pressure switch, the motor was operating ok-ish pumping coolant liquid albeit at...
Forum: General Electronics Technical Discussion Yesterday, 01:41 PM
Replies: 13
Views: 163
Posted By Per Hansson
Re: Motor run capacitor physical size vs voltage rating & measurements?

No, the motor manufacturer designed this a bit strange:
In the input terminal box are just two wires (plus earth) with spade connectors that you put the incoming single phase on.
Then in the...
Forum: General Electronics Technical Discussion 09-22-2020, 01:15 PM
Replies: 13
Views: 163
Posted By Per Hansson
Re: Motor run capacitor physical size vs voltage rating & measurements?

Thank you budm that was a very short and concise answer that really explained it well for me!
I should have understood it intuitively since I know a motor acts as a generator when speeding down.
It...
Forum: General Electronics Technical Discussion 09-20-2020, 02:26 PM
Replies: 13
Views: 163
Posted By Per Hansson
Re: Motor run capacitor physical size vs voltage rating & measurements?

The capacitor in my last post is the dead one that was in the unit.
I showed another picture of it being measured by my Fluke in the OP reading 0.4nF...
Forum: General Capacitor Questions & Issues 09-20-2020, 11:24 AM
Replies: 5
Views: 144
Posted By Per Hansson
Re: Modern Samxon and Teapo caps much better these days?

I would say no, for example Samxon (Man Yue) is based in China.
But both CapXon and Fuhjyyu are based in Taiwan.
I would rate Samxon a few notches above those two!
Forum: General Electronics Technical Discussion 09-20-2020, 08:02 AM
Replies: 13
Views: 163
Posted By Per Hansson
Re: Motor run capacitor physical size vs voltage rating & measurements?

Thanks sam_sam_sam but that capacitor at 1.75" (45mm) width is the same as the used CSC capacitor I already squeezed in there.
In this case since it is a liquid coolant pump the capacitor can not be...
Forum: General Electronics Technical Discussion 09-20-2020, 06:32 AM
Replies: 13
Views: 163
Posted By Per Hansson
Motor run capacitor physical size vs voltage rating & measurements?

(TL;DR skip the first paragraph)
I encountered my first dead motor run capacitor at a customer this week.
For some fields I guess it is a very common occurrence but the usual way for industrial...
Forum: General Computer & Tech Discussion 09-20-2020, 01:28 AM
Replies: 25
Views: 309
Posted By Per Hansson
Re: WD drive "colors"

It is quite impossible to know due to lots of shenanigans like this:

https://www.techspot.com/news/86680-western-digital-5400-rpm-drives-arent-what-they.html
...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-20-2020, 01:24 AM
Replies: 151
Views: 28,820
Posted By Per Hansson
Re: Original Xbox Replacement Caps

The direct links to imgur are still there for the inline pictures.
I always do it like that: just attach the linked picture without changing the link itself.
(As long as it points to a https source...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-19-2020, 12:52 PM
Replies: 151
Views: 28,820
Posted By Per Hansson
Re: Original Xbox Replacement Caps

Agreed.
But I did attach all pictures last weekend so you can see them all.
Forum: Troubleshooting Audio Equipment 09-19-2020, 02:22 AM
Replies: 2
Views: 105
Posted By Per Hansson
Re: Need Help with Roland SC-88 Pro distorted sound!

That is a bit strange, the fact that you can use line-in with no noise means the problem is not in the analog audio output stage.
So it must be something that goes wrong in the MIDI decoding stage...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 09-13-2020, 02:01 PM
Replies: 6
Views: 330
Posted By Per Hansson
Re: Help me identify missing component from Radeon HD4850

NC7SZ08P5 matches Z08 according to my datasheet catalog
Forum: Troubleshooting Power Supplies and Power Supply Design 09-13-2020, 01:53 PM
Replies: 6
Views: 114
Posted By Per Hansson
Re: Blown component identification - EVGA 1000 GQ

You can try once without it: the same will happen if the PSU is switched off and on quite fast:
Then the NTC will not have time to cool down so it will be low resistance and thus the caps charge up...
Forum: Troubleshooting Power Supplies and Power Supply Design 09-13-2020, 01:20 PM
Replies: 6
Views: 114
Posted By Per Hansson
Re: Blown component identification - EVGA 1000 GQ

Yes it is a NTC thermistor to limit inrush current when the capacitors charge up from being off for some time.
It is then bypassed by the relay next to it to increase efficiency.
The value is not...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-13-2020, 01:13 PM
Replies: 151
Views: 28,820
Posted By Per Hansson
Re: Original Xbox Replacement Caps

Yea 100% fake, Sanyo / Suncon do not use bungs with concentric rings.
And only some larger caps have the X vent, 10mm caps have K type vents.
Forum: General Computer & Tech Discussion 09-13-2020, 01:05 PM
Replies: 4,666
Views: 724,121
Posted By Per Hansson
Re: best cheap/free scores 1.1

If you press Alt+PrintScreen then only the window that has focus will be captured.
Forum: General Computer & Tech Discussion 09-11-2020, 11:57 AM
Replies: 5
Views: 149
Posted By Per Hansson
Re: Using electronics power supply as laptop universal psu

Yes it is super useful to run a laptop from a bench power supply when troubleshooting.
Because you will also have the ability to set sensible current limits to prevent stuff from blowing up.
And a...
Forum: General Computer & Tech Discussion 08-30-2020, 12:17 AM
Replies: 36
Views: 993
Posted By Per Hansson
Re: Intel introduces ATX12VO spec eliminating 3.3 and 5v

What 24v?
There is no 24v in the spec.

https://www.intel.com/content/dam/www/public/us/en/documents/guides/single-rail-power-supply-platform-atx12vo-design-guide.pdf

The specification name for...
Forum: General Computer & Tech Discussion 08-29-2020, 03:49 AM
Replies: 36
Views: 993
Posted By Per Hansson
Re: Intel introduces ATX12VO spec eliminating 3.3 and 5v

Linus Tech Tips did a piece on this a couple weeks ago, thought I saw the link here but maybe not?

https://www.youtube.com/watch?v=heyGtgdfN7A
Forum: General Computer & Tech Discussion 08-29-2020, 03:23 AM
Replies: 9
Views: 302
Posted By Per Hansson
Re: Nvidia 3090 back connections leaked to the public

Hahaha this was pure gold, I really did laugh out loud! :D

About the 3Dfx 5500: Yes it had a molex connector, one of the first.
The 3Dfx 6000 however would have an external 12v adapter.
3Dfx...
Forum: General Capacitor Questions & Issues 08-29-2020, 02:52 AM
Replies: 3
Views: 249
Posted By Per Hansson
Re: Elite Brand Capacitors

It may not even require LOW ESR capacitors: note how they are quite far spaced out from the RAM and CPU.
And also realize that 27 years ago capacitors with LOW ESR where not that common.
Forum: Troubleshooting Power Supplies and Power Supply Design 08-29-2020, 02:29 AM
Replies: 5
Views: 340
Posted By Per Hansson
Re: Powerline Network Adapter power Issue

No it means it can perform regulation without any "real" (expensive) sense logic.
But you do have an optocoupler on your device (U8) so might not follow the reference design.
That said I was unable...
Forum: General Electronics Technical Discussion 08-23-2020, 02:18 PM
Replies: 11
Views: 509
Posted By Per Hansson
Re: tackling lithium battery degradation

https://en.wikipedia.org/wiki/Trolleybus
Forum: Troubleshooting Game Consoles & Other Weird Devices 08-23-2020, 01:40 PM
Replies: 9
Views: 409
Posted By Per Hansson
Re: PS3 Slim - CECH 200X - Capacitors check

In circuit ESR measurements are pretty much pointless.
It requires that you know the circuit really well to be useful.
And if several caps are in parallel like is often the case, then in circuit...
Forum: Troubleshooting Power Supplies and Power Supply Design 08-23-2020, 01:34 PM
Replies: 1,661
Views: 368,239
Posted By Per Hansson
Re: the gutless, bloated, and fried power supply hall of shame

I vote for real PFC, not fake.
If it's fake they are just being silly putting so much effort into it!
Showing results 1 to 25 of 500

 
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