Laboratory Power Supply: KORAD KA3005D vs KD3005D - Owners' Insights, Flaws, and Recommendations

Question

I ask the owners of one of these power supplies - do you see flaws in it after the purchase has elapsed and if you had to choose again now, what would you buy and why?
I am thinking about buying one of these power supplies and would like to know their disadvantages.

Gregovic · Answer

in this section something was mentioned about KORADs and other 12 pages to read, best regards

vidmo · Answer

Hello
I have. And come walking around youtube a video scolding this power supply
I am so pleased by the big M but rate it yourself.

Of course, this is not enough to evaluate the power supply, but initially give some insight.

Best regards.

rubens · Answer

vidmo- I see you have an oscilloscope in stock How can you connect it to this power supply and see if the power supply turns on for a split second when turning on the power supply

Anonymous · Answer

I have a question - these Koradas do not bring any own squeaks / noises into the powered system?

rosak · Answer

Appears, and about 30V. Not counting this and the noise from the transformer, I am very happy after about 4 years of use.

rubens · Answer

Thanks.

rosak · Answer

Here you have the inclusion: And here off: Talking about the physical on / off button.

krakarak · Answer

Thank you to colleagues for substantive posts, especially for full output voltage when the power supply is turned on.
There is also a negative opinion about output voltage spikes in response to load in one of the topics at Elektroda.
I will not buy such a linden, where I must always remember to turn on the power supply with disconnected wires at its output, because I can free the powered system.
I will look for another power supply.

maz9 · Answer

I made measurements on kd3005d power supplies a few pieces the same measurements. There is no voltage jump when switching on. The decrease in the graph is turning off the increase is turning on the power supply

rosak · Answer

But this is set to 30V so it won't jump anymore. Set the output to 5V and the time to 100us because you have 1s / div.

Added after 6 [minutes]:

Oh, and you're testing the On / Off button and we're talking about the physical Power button.

maz9 · Answer

Sorry, I add some movies with settings as colleagues have mentioned. Nothing like that, there is no production in 2017, I don't have from previous years, maybe something like that occurred. The power supplies were connected without load. Many inconveniences from previous years do not occur. Many components have been improved, even the unfortunate heat sink or fan.

They are structurally different from those a few years ago back.

ekrzychoooo · Answer

maz9 Regarding the first film. Yes, you cannot measure interference at the power supply terminals (this ground loop in the probe). Please watch the video link from 14:25. or full video or moment 1:11

krakarak · Answer

I think that this much information will help you make the right decision about buying a power supply for your own needs. Thank you for the activity.

Laboratory Power Supply: KORAD KA3005D vs KD3005D - Owners' Insights, Flaws, and Recommendations

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