Hello,
I bought on may a KP184. It was cheap (170$ delivered) and specs looked good. I'm abolutely no expert, juste a hobbyist, so I use it mainly to check if power supplies are working as they should, or testing power bricks / wall adapters, mainly.
So for what I do, that was a good piece of equipment. Then it got positive (I suppose) and negative reviews.
One concern (apart from the power button on the back side and the front connectors layout) is the following : when you draw current for example from a good and well regulated power supply, for example at one or two amps, the current on the source is not stable. I mean it can jump up to 100 mA (200 mA peak to peak). I didn't notice that at first, and for what I do, it was not a problem.
Then I saw a video from a french youtuber who reviewed it : that's how I noticed my unit also had that problem.
There is an easy fix, that the manufacturer told the youtuber after he mailed them : you just have to remove the 240 (-ish) nF capacitor under R10, and the drawn current on the source unit is now stable. Well, much more than before.
Credits go to that youtuber, not to me, obviously.
The video is here if you understand french :
https://youtu.be/NKwUACkCcFsAnd the fix starts at 19:00 :
https://youtu.be/NKwUACkCcFs?t=1140So I thought this had to be shared here. I did the fix on my unit, so here are some pictures I took (and I'm not great at taking pictures either).
The unit is really easy to disassemble, you only have to remove the cover (10 screws) :
(click to get better resolution)
Here is the zone :
It is easy to locate :
Done, and that was a tiny capacitor (0603 ?):
I did this with very basic tools, just a tiny soldering iron (no hot air), so if I could do it, you probably also can :
Thanks for having read.