Bench power supply suggestion - Page 1
Forum section: electronics / testgear

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: October 23, 2022, 03:46:32 pm
content: Hi,I want to buy one of these models,GPP-4323 from GW-instek, my main problem with this is higher price, harder availability and Ethernet is optional.HDP4424B from Hantek it's the same price as owon, it seems more polished and has 4 channels, I can get it around 300$ lower cost than GPP-4323ODP6033 from owon it has 3 channels only and less pricyAny other model under 800$ you would recommend?

author: mawyatt
author_rank: Super Contributor
timestamp: October 23, 2022, 04:22:31 pm
content: We have 3 of the Siglent SDP3303X-E (easily enhanced to a X) and a GW 4323. The GW is nice with 4 channels, but the screen is small for viewing all 4 channels, and AFAIK does not offer user calibration. The Siglent has only 3 channels, but the display is easier to read for displaying 2 channels (3rd channel does not display), and has a somewhat quirky UI (which is easily mastered) & non-standard terminal spacing, but offers user calibration.These are really good lab supplies and accurate, however the one we always reach for in quick usage is the Siglent, the GW is seldom used unless a complex task is at hand requiring multiple PS channels. For the $400 the Siglent is tough to beat, especially when so easily "enhanced" to the X version (1mv and 1ma resolution).Honestly you can't go wrong with either, but don't know about the others you've mentioned. Don't forget to get the EEVblog discount if you go with a supporting supplier like Saelig here in US.Best,

author: nctnico
author_rank: Super Contributor
timestamp: October 23, 2022, 04:51:40 pm
content: For me a numeric keypad is a must on a digitally controlled PSU. Otherwise you keep turning the encoder endlessly.

author: Hexley
author_rank: Regular Contributor
timestamp: October 23, 2022, 05:19:38 pm
content: Quote from: ali_asadzadeh on October 23, 2022, 03:46:32 pmIt seems that Instek made Ethernet standard at some point recently. You might want to double check with your supplier.That Hantek looks well thought out. They placed the select and enable buttons right over their respective output terminals, which is how it should be done.Also, those output terminals are clearly color-coded right on the front panel, which is again how it should be done. Neither the Instek nor the Siglent does this as well in my opinion. Some of us GPP-4323 owners have resorted to marking the output terminals with acrylic marker. EEVBlog user jjoonathan pioneered this technique. My attempt to copy him is shown below.The Instek is pretty compact, at 213x145x312 mm. The Hantek is wider, taller and deeper, at 232x153x392 mm, which could be a consideration if your bench space is limited.The main advantage of the Instek is of course that two of its channels can be changed from power supply to active load mode. It turns out to be surprisingly useful to set up a load channel to constant current and use that as a current sink for non-destructive testing of LEDs, Zener diodes, and the like. I have also used a load channel in parallel with an output channel to make a two-quadrant source for emulating a battery in charge/discharge modes.Good luck with your decision.

author: tautech
author_rank: Super Contributor
timestamp: October 23, 2022, 07:04:22 pm
content: Quote from: nctnico on October 23, 2022, 04:51:40 pmThat's not the case if you can select the digit you need to adjust.

author: jjoonathan
author_rank: Frequent Contributor
timestamp: October 23, 2022, 08:48:02 pm
content: My GPP-4323 is still my daily driver and I love it dearly. As Hexley was saying, the one issue out-of-the-box is lack of color coding, which is easily fixed. Everything else is rock solid. I stand by my review.That said, GPP-4323 prices have gone up and the Hantek has appeared. The Hantek looks tempting, and I want to say that the better interface and lower price give it an easy win over the Instek, but there is just one problem: Hantek's well-earned reputation for bugfest products. Long ago I bought a Hantek scope and it was utter garbage, both hardware and software, and I have periodically seen evidence that they have continued with the approach "don't fix bugs, just discount until it ships." I have also killed expensive prototypes with cheap power supplies. I do not want to repeat that mistake, so I wouldn't touch the Hantek power supply unless I saw someone else (or several someone elses) use it extensively without issue. Your risk tolerance may vary.Best wishes! Let us know your experience if you pick the Hantek.

author: nctnico
author_rank: Super Contributor
timestamp: October 23, 2022, 09:35:25 pm
content: Quote from: tautech on October 23, 2022, 07:04:22 pmIt is still a crappy way to operate a bench PSU. I have some instruments that need to be adjusted that way and it is not very comfortable.

author: TurboTom
author_rank: Super Contributor
timestamp: October 24, 2022, 08:13:05 am
content: You may also have a look at Rigol's new additions, DP932A and DP2031 (though the latter is clearly above your mentioned budget). On my DP800 supplies, I always liked the ultra-sturdy mechanical construction (which is good to have at ~10kg weight of these PSUs) and the option to use them resting on their back face on the floor, next to the workbench.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: October 24, 2022, 08:13:49 am
content: Thanks for the feedback, I'm toward GPP-4323, But it has higher price, and lower price looks temptingIf I go with hantek do I make a bad choice? what about owon, it has higher output power at the same price of hantek?

author: John B
author_rank: Frequent Contributor
timestamp: October 24, 2022, 08:32:44 am
content: Although there's more "value" with more channels, there's usually less functionality. I have a 3 channel GPE PSU from GW instek, and while it's generally fine, the 3rd channel is 5V only and doesn't have a user specified current limit. When I have on board regulation I generally want at least 7.5V. I came to much the same opinion again regarding the newer GPE series in a 4 ch version, but I would definitely consider the 2 channel.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: October 27, 2022, 11:10:35 pm
content: Guys I have made my near final decision, I mean I'm going to buy these equipment’s next week from my supplier in China,For the power supply I go with GPP-4323 @ 4900RMBAnd for my first Digital oscilloscope I'm going with siglent SDS2104X Plus @8100RMB,I want to know if I'm making the right decision, or Should I go with HDO1074 or MSO5074 from Rigol,Note That I plan to hack the scopes to max options.

author: tautech
author_rank: Super Contributor
timestamp: October 27, 2022, 11:29:53 pm
content: Why, you flag says Canada ?If you wait a few days there are sales promotions coming with free options and much better pricing.Right now best advice is to hold off purchasing for the significant savings over Nov and Dec.https://www.eevblog.com/forum/testgear/siglent-sds2000x-plus-coming/msg4487866/#msg4487866

author: BillyO
author_rank: Super Contributor
timestamp: October 27, 2022, 11:49:29 pm
content: Quote from: ali_asadzadeh on October 27, 2022, 11:10:35 pmOn the scope look into pricing from RCC in Toronto. They ship for free and they do provide support, as well you can get more detailed support from Siglent NA. If you buy from China you will likely be on your own.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: October 28, 2022, 12:01:53 am
content: QuoteThanks for the update, what sort of pricing should we expect?Also Should I go with Rigol or siglent?