| Products > Test Equipment |
| Inside the new Korad KA3305P linear PSU |
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| SantaClaw:
Just want to mention, I've used my KA3305P for nearly 4 years now, It's been flawless for my usage. |
| GuidoK:
--- Quote from: Pnoxi on March 14, 2019, 06:25:12 pm ---Power supply Tenma 72-2630 (Korad KA3303D ?) at a good price! 95.92€ + VAT https://sk.farnell.com/tenma/72-2630/power-supply-bench-0-30v-5v/dp/2478798 --- End quote --- Currently is the RND KA3305P also on sale at distrelec for € 144,-- ex VAT (probably only interesting for EU buyers) So this is a rebranded version of the Korad KA3305P (so the programmable one, with normal screw/banana output terminals, not the safety ones) https://www.distrelec.biz/en/bench-top-power-supply-number-of-outputs-voltage-max-30-current-max-programmable-rnd-lab-rnd-320-ka3305p/p/30061865 On this one the fan rotates slowly when no load is attached (so pretty quiet) and starts to run faster when load is applied. My model doesn't give any ratteling or such from the fan, just normal fan noise. I haven't opened it up yet to see what fan is inside. Comes with version 6.0 and 6.2 from the software. But the software is a 240mb install or so. I think I'll try to get it working with sigrok, but I don't know if the dual channel Korad psu's are supported. |
| stevelup:
Hi Folks, Does anyone have the schematics for these units? I've got an issue with the fixed 5V output on mine whereby it seems to be current limited to about 1.9A rather than 3A. Cheers! |
| SantaClaw:
My third channel doesn't have a current limit, I just "shorted" it with a 10A amp meter, and it did over 7 amps... I did not measure the voltage when I did that though. I will hook my meter up to my laptop when I get back from the store, and get a proper reading. |
| stevelup:
Well mine is definitely borked! There’s a large pass transistor mounted on the heat sink on the same side as the three bridge rectifiers, but it’s not clear where that gets it’s drive from. |
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