KD3005D - Precision Variable Adjustable 30V, 5A DC Linear Power Supply Digital Regulated Lab Grade…

The KORAD unit I received exhibited great performance, especially against its peers at similar price ranges.The first thing you'll notice when you pull it out of the box is, it's quite heavy. This is a good thing, the transformer inside the unit looks to be of good quality.The second thing you'll notice, if you apply an electronic load drawing the full 5 amps, is the unit will switch to constant current at 5A. The voltage may drop a little bit (few millivolts) but that's no big deal... you shouldn't run bench power supplies at full load anyways.I and a coworker tested the unit with an oscilloscope and a precise, calibrated electronic load. The voltage readout on the unit under load was bang on. The current readout was bang on. And the ripple, at ~30V drawing the full 5 amps, the maximum power for the unit... was 10 millivolts.This is amazing for such a low cost variable power supply. 10 millivolts ripple will allow you to power many high speed electronic systems with it, and it's cheap enough you can have multiple around to provide for various rails. Of course, it is outside the spec of some parts, but if you're developing with those parts, you will have the budget for more expensive gear to fit that spec.All in all, this is a VERY impressive hobbyist bench power supply, and I hope the quality never falls. They can charge double for this device, and it would still be worth it. I'm using it to power the 24v logic of the Teknic Clearpath SC servo system, and it works very well for that purpose.

Seems like a decent quality linear power supply. Beefy transformer, easy to read display and intuitive controls. Fan is extremely loud, it is a 12v 80x80x25mm PC fan, but be aware that it can't be replaced with just any fan as the fan power circuit is 1.5-22v PWM at 52hz. A Noctua fan I tried would not be driven from this output and I would imagine it's the same with any other fan with integrated circuits.

I purchased this DC power supply specifically to build a silver refining electrolysis machine to refine old junk silver into .999 pure silver. So far I have refined over 200 oz's of silver with this power supply and have not any issues or problems. I ran this unit non stop for over a week and it worked flawlessly. After a week of use it was still cool to the touch and started right back up on the next batch of silver I refined. The unit arrived very quickly and was very well packaged. The box looked like it just came off the assembly line and right to my door! There are many different power supplies that are available, but I think this is probably the best value for your buck.Some of the feature I like with this power supply:1. The best feature is that it has a cooling fan at the rear of the supply. This really helps keep internal components cool which is important if you are using it in a warm area with limited cooling. The fan is very quiet and will automatically adjust fan speed depending on the power load. This is one of the main reasons I chose this supply over many others.2. The unit is easy to operate and comes with a decent instruction manual written in English.3. The display is bright and easy to read your setting even from a distance.4. The knobs to adjust the power settings feel good and solid.5. It has a grounding connection which some other supplies do not have.6. The unit shipped with alligator clips (3 feet)7. Heavy duty single channel power supply with continuously adjustable voltage and current.8. 120/220v selector switch in the back of the unit.If you are in the market for an adjustable DC power supply I highly suggest you give this product a try, you won't be disappointed! I expect that it will last for a very long time as it has proven itself already many times.If you have any questions please feel free to ask!

This unit has been sitting on my workbench for around 2 years now. I purchased it for hobby electronics and powering breadboard circuits.Good:- Accurate to within 10s of millivolts at it's worst from my experience.- very low voltage ripple @30V 5A with around 30 mV according to my oscilloscope @30V 5A- Very nice looking transformer located inside the unit.- Extremely good performance for the value. For equivalent quality / specs (not the other trash on Amazon) most other competitors would charge at least twice as much.Bad:- there is still 0.053V across the output when you have the voltage set to 0V.- The controls are a little odd, but totally usable and you get used to it pretty quick. Just not my favourite.- The fan can be a little loud.Overall:This unit is one of the best on Amazon and you can't go wrong with it. As long as you're not expecting extreme scientific accuracy and ripple levels you will not be disappointed.

La caja venía golpeada no estaba bien asegurada pero la fuente está en buenas condiciones y funcionando al 100