Good Value Bench Supply - Page 1
Forum section: electronics / beginners

author: ksmccausland
author_rank: Newbie
timestamp: September 29, 2016, 09:13:11 pm
content: Looking to get a new bench supply with the following criteria being the "ideal," but obviously not gonna happen: 48V, 5A, 3 isolated outputs (one 0-5V output); I'll settle for 24V, 3A, but has to have 3 outputs. Anyone have any recommendations? I'm not turned off by the name brands $ticker price, but if I can save some $ without too much sacrifice that'll be the best option. I've looked around and have seen some of the stuff from Circuit Specialists PPS2320A (https://www.circuitspecialists.com/hantek_pps2320a_power_supply.html) on the low end, to the Rigol 832 (https://www.rigolna.com/products/dc-power-supplies/dp800/dp832/) on the high end. Any input from anyone who owns one of these or has something else in the ballpark? I know Dave seems to like the Rigol...granted after he fixed it

author: rstofer
author_rank: Super Contributor
timestamp: September 29, 2016, 10:43:32 pm
content: I am headed for the Rigol DP832 as soon as I recover from a few other expenses. There is a better discussion forum over inhttps://www.eevblog.com/forum/testgear/I'm pretty sure Dave's problem with the heatsink has been resolved.One reason for selecting the 832 is the ability to upgrade it to the capabilities of the 832A with a little hack. This gives better resolution but I understand that the 832A has a more colorful display. Somehow that doesn't interest me...

author: tautech
author_rank: Super Contributor
timestamp: September 29, 2016, 10:58:28 pm
content: Have you had a look at these:http://www.siglentamerica.com/pdxx.aspx?id=1393&T=2&tid=17The SPD3303X-E is reasonable value @$389In series mode it'll do 1 output at 60 V and 3 A.You can get the EEVblog member discount code here:https://www.eevblog.com/forum/testgear/equipment-discounts-from-saelig/

author: FlyingHacker
author_rank: Frequent Contributor
timestamp: October 01, 2016, 12:07:38 am
content: Depending on your needs you may want to look at used lab equipment like a Lambda or an Acopian, or even an old HP. These may not have all the fancy displays (most are analog meters), but they are rock solid power supplies that will far outlast the modern Chinese ones.When you buy something don't think about what it costs, but rather think about what ELSE you could buy with that money. Spend money on a fancy PSU and that is less money for something more useful like a scope. Quite frankly, most tinkering could be done with a 12V and 5V wall wart. They have their own form of current limiting (i.e. very little current to begin with).I would suggest you do get a PSU with current limiting, though. That will save lots of parts over its lifetime.

author: nanofrog
author_rank: Super Contributor
timestamp: October 01, 2016, 05:42:37 pm
content: Given you're in the US, I would also vote for quality used triple output supplies.I'd also recommend taking a look at Power Designs, Systron-Donner, Kenwood/Trio, and Leader.Some examples:Power Designs TP343Power Designs TP343B* (the voltage output changed from the previous model above).Systron Donner TL8-3Leader LPS-152The current output will depend on the model and configuration (i.e. parallel or series), but all of these will meet 24V or higher.* For disclosure, I own one of these and it's my primary supply.

author: FlyingHacker
author_rank: Frequent Contributor
timestamp: October 01, 2016, 11:08:13 pm
content: This is a triple Lambda. I have two of these. Fantastic supplies that will still be cooking long after a Rigol is in the landfill.http://www.ebay.com/itm/Lambda-LPT-7202-FM-Triple-Output-Regulated-DC-Power-Supply-/131955017784?hash=item1eb921c838:g:LO0AAOSw6n5XvJAR

author: ProBang2
author_rank: Frequent Contributor
timestamp: October 02, 2016, 01:08:31 am
content: Quote from: tautech on September 29, 2016, 10:58:28 pmThis PSU, reviewed from Dave? Or the cheaper model with less resolution?http://youtu.be/mdOauVzY9OUI am probably in a similar situation as the thread opener. Right now I am using the well known Korad PSU. (And I like this little sucker!) But I have a growing need for a PSU that is able to deliver at least 2 voltages of +15V and -15V at the same time. It seems, it will be a decision between the Rigol 832 and the Siglent 3303X. Until now the Rigol is prefered, because the Siglent has some negative points:No Go:No reliable 4mm standard connection.No standard width between the connectorsMajor Issues:Cable harness (with mains!) scratched from the chassis.Slider switch for the 3rd channel. (In my experience: They are not reliable.)Sad decisions:No 0-9 buttons for direct input of the wanted values.Wasted display (as mentioned in the video).Only 2 of the 3 channels displayed. Why?Minor Issues:Using of cheap capacitors.Rust. Straight from the factory... Serious?From the points above: Are there any solved? Perhaps I missed a follow-up video? (Like the one for the Rigol 832 or even for the Korad K3005P.) Or is there a software update (regarding the wasted display space)?And the last question:Is the cheaper Siglent 3303 version as easy hackable (for higher resolution) as the Rigol 832?

author: tautech
author_rank: Super Contributor
timestamp: October 02, 2016, 03:02:19 am
content: Quote from: ProBang2 on October 02, 2016, 01:08:31 amSame series but I've mentioned the "-E" with 10mV and 10mA resolution that's a good bit cheaper.But if you want to save a good bit more and don't need all the bells and whistles:http://www.siglentamerica.com/pdxx.aspx?id=174&T=2&tid=17Most of your other questions can be found in this thread, but a lot of it is just negative Siglent bashing.Sift through it to find what you need to know and I'll attempt to fill any gaps if you need.The 2 things I will comment on however are rust and Cap choice, both of which are totally blown out of all proportion and have no affect on the longevity of Siglent products that I have experienced.https://www.eevblog.com/forum/blog/eevblog-828-siglent-spd3303x-precision-lab-psu-teardown/I'll have a 3303X-E in stock in a couple of weeks if there's any tests you'd like me to do.