EEVblog #828 - Siglent SPD3303X Precision Lab PSU Teardown

the 2020 version : banana connectors now with correct hole. the wires are now secured with cable ties, the too hot bridge rectifier is now 56C, no more screensaver, both setpoint and actual are displayed at same time. idle power usage 12W all outputs off.

This is an old video but I think it's worth giving an update on the SPD3303X-E that I just bought. First of all, I am not seeing any of the Siglent rust in there, it's all nice and clean steel sheet in there. Second thing is about the mains wires. They clearly have seen this video because the main wires are no longer ty-wrapped together with other wires, the no longer run along the sharp edges of the steel sheet and they now also have a very rigid extra plastic sleeve over the wires for added protection. edit: Third is the UI, the new UI still shows the timer but in a small font and the display now shows both the settings for voltage /current and the actual voltage/current. Best of all: no screen saver anymore! The only thing (which I don't remember you mentioning) is the lack of a sense input for both channels. It's a bit strange to have a power supply that can supply 32V @ 6A with a 1 mV adjustable voltage level without a sense input.

I love the way Dave is so up-front with these reviews / teardowns, even after having the CEO of Siglent in the lab this week. lol No holding back. I like it. :D

Always love your channel, love the detail you go into with teardowns

shorted turn on toroid transfomer! ooh, something else I wasn't aware of! Thanks +EEVBlog! learning more everyday!

Message to Eric of Siglent, make all the improvements mentioned in the video and add $10 to the cost if that's what is required. It will benefit you in the long run!

Feel-o-vision, love it. Love your work, man.

Perfect timing Dave, was just choosing between Rigol and this Siglent. Ordered Rigol for it's display and regulated ch3

Reviews like this make me smile when I recently picked up a BK Precision 1660 (yup old but in great condition) for $100 Cdn :)

Yolo, that's all I can think of for now on when I see a Siglent review.

thanks Dave, I'm glad that we have someone like yourself that knows what their doing and has the tools and knowledge to thoroughly test stuff.

Looks like 5mm banana plugs would fit perfectly. Also that BNC adapter looks like it would fit directly into EU style mains socket and could be reason for using different spacing.

Agree on the binding posts. Wow, unreal!

Dave at his finest... objective with good valid critisme. * lack of bind post standard * Way to loose fitting * Display not incl. helpfull adjustment info & limits. Though the trend / grpahing on the units display, looks nice.. and the colored graphical display, do like that.

the chassis is not laser cut, the deformation at the edges shows that it's stamped/shear-cut

Thanks for the useful review - it looks really similar internally to GPD-3303S from GW-Instek

Love that relay oscillation...

Those banana plugs are inexcusable, the rest of the instrument is irrelevant.

Hi, Dave. Love the great work. Bought the siglent PSU because of the bang-for-the-buck. Happy with it except for the non-std spacing. Don't get that at all. But, when I got it, one side of the units paint was delam. I took pix to share if you'd like. KJM

Very helpful video, thanks. Sigmund has since changed the banana plugs and other than the spacing which has no meaning for me they are OK now. So I just ordered one of these. I also looked up the data sheet for the Lelon capacitors. The 6800/63 is rated 105°C, 3.6A ripple current, 3000 hour life at full load @ temp. That is spec for spec as good is the Nichicon, Panasonic, or CDE caps. I know you are not a fan Taiwanese capacitors but in the absence of any data to the contrary and if you can believe the specs, that’s about as good as it gets for a filter cap.