Products > Test Equipment
Cheap bench power supply?
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nctnico:

--- Quote from: Aldo22 on January 29, 2024, 10:03:48 am ---What do you think of the measures shown in this video to reduce the noise?

--- End quote ---
He stole my idea from EEVblog! That is what I think  8) I did exactly the same (and more) to a similar PSU and posted the results here.

But the noise still is too high for use as a bench supply if you want to make measurements in a circuit
Aldo22:

--- Quote from: nctnico on January 29, 2024, 12:52:41 pm ---He stole my idea from EEVblog! That is what I think  8)

--- End quote ---

Then it can't be all that wrong.  ;)


--- Quote from: nctnico on January 29, 2024, 12:52:41 pm ---I did exactly the same (and more) to a similar PSU and posted the results here.

--- End quote ---

Where exactly is "here"?

Thank you.
Wallace Gasiewicz:
You can also use a probe like that with a spectrum analyzer to locate source of a specific frequency that concerns you..  I do it all the time.  You can even use a probe that contacts a crystal to see its freq. Just touch the probe to the xtal can. The signal is too small for a scope but a spectrum picks it up.
Fix looks pretty good.   
But here you have how much test equipment and stock of parts to get a switching supply under control?   
Then you would have to test it with different loads and different power levels.To avoid this problem get a linear supply at first. Even an old one with analog meters.  You can always check your voltage with a voltmeter. 
Now, if you plan on using things that have USB power it would be nice to have these outputs on your PS.
Randy222:
What about the Matrix line of PSU's? Some appear to look like the Korad's

And then, I always wondered what you can get from a kit like this, but you add in some filtering on the output.
https://www.aliexpress.us/item/3256801871857454.html

I am eyeballing this dc-dc set (style) because I might actually place the psu unit under my work desk, then cable to the controller using a shielded cable. I need small footprint on desk workspace.
DaneLaw:

--- Quote from: Randy222 on January 29, 2024, 03:25:02 pm ---What about the Matrix line of PSU's? Some appear to look like the Korad's

And then, I always wondered what you can get from a kit like this, but you add in some filtering on the output.
https://www.aliexpress.us/item/3256801871857454.html

I am eyeballing this dc-dc set (style) because I might actually place the psu unit under my work desk, then cable to the controller using a shielded cable. I need small footprint on desk workspace.

--- End quote ---

Your link is sadly region-restricted.
A shame how Aliexpress gone bananas with their listing region-restrictions for certain continents here in 2024.
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