Author Topic: Basic Power Supply  (Read 1841 times)

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Offline psysc0rpi0n

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Basic Power Supply
« on: July 27, 2019, 01:33:16 pm »
Hello.

I'm seeking advice.
I want to purchase a basic power supply for home and/or hobby usage.
Not many features needed, just the basic for security like over current protection (maybe not the correct wording. Is it reverse current?).

I probably won't need more than 30V and maybe up to 10A (5A would also be OK I guess).

I think 2 channels is almost mandatory to have the possibility of having access to mirrored voltages!

What brands would you suggest up to about 150€???
 

Offline Jan Audio

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Re: Basic Power Supply
« Reply #1 on: July 27, 2019, 01:39:56 pm »
If that exist i buy also.
You need more money.
 

Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #2 on: July 27, 2019, 02:09:06 pm »
What can I get up to that price?


Edited;

I have no clue about brands but looks like that with less than 250€ I won't get anything with 2 channels. Disregarding the price, what are low budget options with 2 ch?

Global Specialties brand is anything good?

I found this LeCroy but it's almost 500€...
Link Lecroy Teledyne T3PS23203
« Last Edit: July 27, 2019, 02:23:57 pm by psysc0rpi0n »
 

Offline Jan Audio

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Re: Basic Power Supply
« Reply #3 on: July 27, 2019, 02:33:12 pm »
There are 3 channel PSUs for around 300 Siglent SPD3303C only i dont want that brand.
I like the iTech 6302 for around 500, only its still chinese crap.
Better bring 1400 euro for some quality rhode & schwartz, they just increased the prices from 1250 to 1400, now i can not afford that even more ( not that NGE crap model ).

I see there is a UNI-T UTP3303C also, i would not buy that brand.
« Last Edit: July 27, 2019, 02:36:03 pm by Jan Audio »
 


Offline Candid

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Re: Basic Power Supply
« Reply #5 on: July 27, 2019, 03:39:44 pm »
1. https://www.welectron.com/Korad-KD3305D-Labornetzteil_1
2. https://www.welectron.com/Korad-KA3305P-Benchtop-Power-Supply

1. 179,- EUR including 19% VAT
2. 229,- EUR including 19% VAT

Shipping from Germany to Portugal about 10 EUR only with DHL

No. 2 I can suggest, it works very well for the price. No. 1 may be very similar in quality.
« Last Edit: July 27, 2019, 03:44:17 pm by Candid »
 

Offline Jan Audio

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Re: Basic Power Supply
« Reply #6 on: July 27, 2019, 03:42:08 pm »
Remember this : if your PSU fails, they keep sending it back to china until you have no more warranty,
the same counts for the R&S brand ( not to china then ), they dont fail as often.
With these prices it is expensive gambling.

Peaktech looks nice, it is not trusty, even before warranty ends.
No real quality control they told me in this forum.
 

Offline Candid

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Re: Basic Power Supply
« Reply #7 on: July 27, 2019, 03:47:29 pm »
I got a Korad from Welectron and it was faulty and I got it replaced without any costs for me even no postage costs for sending the faulty unit back to them. I got a DHL returning ticket sent from Welectron. Perfect service and good prices.
 

Offline Jan Audio

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Re: Basic Power Supply
« Reply #8 on: July 27, 2019, 03:52:59 pm »
Ah that is better if you get a new fresh model without repairs, if a shop can guarantee that to me i certainly buy any brand from them.
New model with new guarantee that is.
 

Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #9 on: July 27, 2019, 04:01:49 pm »
There are 3 channel PSUs for around 300 Siglent SPD3303C only i dont want that brand.
I like the iTech 6302 for around 500, only its still chinese crap.
Better bring 1400 euro for some quality rhode & schwartz, they just increased the prices from 1250 to 1400, now i can not afford that even more ( not that NGE crap model ).

I see there is a UNI-T UTP3303C also, i would not buy that brand.

OOhhh no way. That would cost more than my Scope...
If I buy a better power supply, it will be at most 500€. And it cannot be right now. I need to wait to get my hands on that money!
 

Offline bob91343

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Re: Basic Power Supply
« Reply #10 on: July 27, 2019, 04:03:01 pm »
I have lots of power supplies, none of which I purchased new.  Swap meets, auctions, friends, all have helped stock my laboratory.  Not to mention the learning factor in trying to repair a unit that didn't do what it was intended.

I just bought a power supply at a swap meet for $2.  It had a shorted diode across the output.  It works great now, up to 18V at 2A with digital meters and current limiting.

The guy who sold it to me predicted that I would have it working in 5 minutes.  He was wrong; it took 15 minutes because it had two problems.  The other one was that the binding posts had been interchanged so it put out reverse voltage if you believed the colors.
 


Offline Jan Audio

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Re: Basic Power Supply
« Reply #12 on: July 27, 2019, 04:07:55 pm »
That velleman dont even has a type number, how can youtube find it then ?,
if its not on youtube from a user i dont like buying at all.

Owon oscilloscopes also looks nice, only no one on youtube has it, must have a reason maybe because no one has one.
 

Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #13 on: July 27, 2019, 05:45:00 pm »
That velleman dont even has a type number, how can youtube find it then ?,
if its not on youtube from a user i dont like buying at all.

Owon oscilloscopes also looks nice, only no one on youtube has it, must have a reason maybe because no one has one.

Well, I'm not looking for scopes. That's was just a comment on the price you told me for a good Power Supply. Not even my scope cost that much. And it's a cheap one too but it fits my needs so far. It's a basic Rigol MSO1104Z.

So to buy a Power Supply that costs more than a scope it's not reasonable for me not even in my possibilities. I can't afford such a power supply. I may consider something around those 400€ or 500€ max but not right now! I need to save some more to be able to purchase such power supply!
 

Offline Nornand

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Re: Basic Power Supply
« Reply #14 on: July 27, 2019, 05:45:16 pm »
That velleman dont even has a type number, how can youtube find it then ?,


LABPS23023
 

Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #15 on: July 27, 2019, 06:43:57 pm »
That velleman dont even has a type number, how can youtube find it then ?,


LABPS23023

Can't find reviews, tests or anything relevant about that brand!
 

Offline ledtester

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Re: Basic Power Supply
« Reply #16 on: July 27, 2019, 07:29:31 pm »
A couple of years ago I got a Tenma 72-8335A which has 2 channels @ 24V 1A/CH plus a 5V/2A channel, and it continues to serve me very well. Since then I've acquired a used Topward 6303A which is more in line with what you are considering. However, I still find that my Tenma is often adequate for the testing that I need to do.

Most digital and op-amp circuits can get by on 24V / 1A. There will be times when you need more volts or amps, but I've always been able to cobble together another power supply to do the job. Step-down converters like the Ruideng offerings make this easy and offer very good performance.

I got my Tenma for around $80 on sale from Newark. It's not available from the major distributors anymore, but I found this link selling used ones - and they have a European phone number:

(link)

The main point I wanted to make, though, is that you might be able to get by with multiple cheaper supplies.

And here's Dave's review of an earlier model Ruideng buck-converter module - the newer ones have a nicer user interface:

https://youtu.be/Cw2AjcczHg4

« Last Edit: July 27, 2019, 07:32:37 pm by ledtester »
 

Offline tautech

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Re: Basic Power Supply
« Reply #17 on: July 27, 2019, 08:26:26 pm »
There are 3 channel PSUs for around 300 Siglent SPD3303C only i dont want that brand.
I like the iTech 6302 for around 500, only its still chinese crap.
Better bring 1400 euro for some quality rhode & schwartz, they just increased the prices from 1250 to 1400, now i can not afford that even more ( not that NGE crap model ).

I see there is a UNI-T UTP3303C also, i would not buy that brand.

OOhhh no way. That would cost more than my Scope...
If I buy a better power supply, it will be at most 500€. And it cannot be right now. I need to wait to get my hands on that money!
370 Euro buys you a good 3ch PSU with the ability to parallel to 30V @ 6A and series for 60V @ 3A.
They don't give issues and are a steady good seller here.
https://www.siglenteu.com/power-supplies/spd3303x-spd3303x-e-series-programmable-dc-power-supply/
Avid Rabid Hobbyist
 
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Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #18 on: July 27, 2019, 10:17:16 pm »
There are 3 channel PSUs for around 300 Siglent SPD3303C only i dont want that brand.
I like the iTech 6302 for around 500, only its still chinese crap.
Better bring 1400 euro for some quality rhode & schwartz, they just increased the prices from 1250 to 1400, now i can not afford that even more ( not that NGE crap model ).

I see there is a UNI-T UTP3303C also, i would not buy that brand.

OOhhh no way. That would cost more than my Scope...
If I buy a better power supply, it will be at most 500€. And it cannot be right now. I need to wait to get my hands on that money!
370 Euro buys you a good 3ch PSU with the ability to parallel to 30V @ 6A and series for 60V @ 3A.
They don't give issues and are a steady good seller here.
https://www.siglenteu.com/power-supplies/spd3303x-spd3303x-e-series-programmable-dc-power-supply/

I like that one way more despite the fact that I didn't need the fancy screen. That might be a good option.

thanks for this suggestion.

Edited;

Ohhh, I just noticed you're a Siglent ditributor, right?
 

Offline nctnico

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Re: Basic Power Supply
« Reply #19 on: July 27, 2019, 10:43:04 pm »
Tautech is a Siglent distributor so according to him Siglent is always the best. Too bad he removed the line saying he is a Siglent distributor from his signature. In the 300 to 400 euro ballpark there is a lot of choice from many brands. I setup this URL to show PSUs up to about 500 euro:
https://eleshop.eu/test-measure/power-supplies/filter/price/28-517.html

I have no affiliation with this webshop other than being a customer. They carry a wide variety of brands to cater to any budget and requirement.

BTW: did you look on Ebay or your localised online advertisements website for a used power supply?
« Last Edit: July 27, 2019, 10:52:03 pm by nctnico »
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline aristarchus

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Re: Basic Power Supply
« Reply #20 on: July 27, 2019, 11:03:30 pm »
Since seen that you also got the MSO1104z like me, my advice is to get the DP832, I got it and am happy with it two years now.
 

Offline tautech

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Re: Basic Power Supply
« Reply #21 on: July 28, 2019, 02:12:32 am »
Ohhh, I just noticed you're a Siglent ditributor, right?
Yep as noted in my profile.

If I thought the X/X-E model PSU's were a POS I wouldn't suggest one as they continue to sell steadily here.
I don't have any issues with them other than with the EU and US websites that still don't show the default display like you can see here on the factory website:
http://www.siglent.com/ENs/pdxx.aspx?id=1132&T=2&tid=17

At the end of the day it's your $/Euro to spend on what best fits your needs and budget.
Good luck with your hunt.
Avid Rabid Hobbyist
 

Offline TurboTom

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Re: Basic Power Supply
« Reply #22 on: July 28, 2019, 07:51:40 am »
Since seen that you also got the MSO1104z like me, my advice is to get the DP832, I got it and am happy with it two years now.

100% confirm! AFAIK, the DP800 is the only lab supply family available in this price range with the option to enter the settings via a decimal keypad or via the encoder -- it's your choice. Having got other PSUs with encoder / pot only "programming" interface, I always prefer my DP832 or 811. Their base models can be hacked to the full-featured "A" versions. Don't let you talk out of the 832 due to the fact that CH2 and CH3 share a common ground. This has been covered in many contributions and you can use the two main channels in series, in parallel and also to provide a split, symmetric supply. The supply provides the same "headroom" as the Siglent SPD3303X series (2x 32V@3.2A max; 1x 5.3V@3.2A max), Rigol only don't promote it as a feature (maybe they should...).

Consider this: you may not need a 'scope for every single design you build or device you test, but you very likely need a PSU for it so I wouldn't skimp on that one. It may hurt a little more when buying, but later on, you will always enjoy a quality tool.

So my recommendation would be, if you are really sure you don't want a PSU with a decimal keypad, get the Siglent or a second hand "premier" brand PSU (though the second hand market in Europe isn't comparable with the US, it's much more difficult to get a good deal), otherwise get a DP832.

Cheers,
Tom
 

Offline nctnico

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Re: Basic Power Supply
« Reply #23 on: July 28, 2019, 08:19:39 am »
I second the keypad suggestion on a digitally controlled PSU. I have a few of these (from HP/Agilent/Keysight) and I always use the keypad to enter the values. Much quicker than turning an encoder knob for an eternity. On an analog PSU I prefer 10 turn potmeters.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline Jan Audio

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Re: Basic Power Supply
« Reply #24 on: July 28, 2019, 01:18:14 pm »
Ohhh, I just noticed you're a Siglent ditributor, right?

That is why i dont buy that brand.
 

Online BillB

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Re: Basic Power Supply
« Reply #25 on: July 28, 2019, 03:21:21 pm »
Ohhh, I just noticed you're a Siglent ditributor, right?

That is why i dont buy that brand.

Seriously?  Because a distributor recommends the products he sells?

IIRC, tautech has never hidden the fact that he is a Siglent distributor.  It is clearly visible in his profile that can be seen on every single one of his posts.

I'll admit that I have a lot of Siglent gear, and I'm actually thankful to have an active forum member who also represents the brand.  He has provided extremely helpful support for the equipment that I have, but he also contributes extensively in general.  There are many other factory reps here for other brands that chime in occasionally to support/recommend their product and that is it.  Between the two, I'll take the active contributor.

Back to the topic at hand, I've got a few of the SPD-3303X-E's and I haven't had any problems with them.  Sure there are a few things I don't like, such as the lack of a keypad and the anemic third channel.  But, for the price, I think it offers a nice set of features for the money.     
 
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Offline Jan Audio

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Re: Basic Power Supply
« Reply #26 on: July 28, 2019, 03:42:44 pm »
I,m not here to read advertiesements.
If you get direct help in your problem topics is a good thing.

They advising only 1 brand for years, i bet people fall for it.
 

Offline Candid

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Re: Basic Power Supply
« Reply #27 on: July 28, 2019, 03:51:43 pm »
370 Euro buys you a good 3ch PSU with the ability to parallel to 30V @ 6A and series for 60V @ 3A.
They don't give issues and are a steady good seller here.
Very similar to the Korad KA3305P (Programmable benchtop power supply, 3 channels (2x30V/5A, 5V/3A), parallel and serial mode for the 2 30V/5A outputs, 315W total power, 10mV/1mA resolution, USB/RS232 interface) 229,- EUR incl. 19% VAT. THe siglent has a smarter display if needed/preferred and my have better internal electronics. The Korad has better resolution 10mV/1mA.

https://www.welectron.com/Korad-KA3305P-Benchtop-Power-Supply
« Last Edit: July 28, 2019, 03:54:03 pm by Candid »
 

Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #28 on: July 28, 2019, 04:19:11 pm »
I've been reading posts. It is obvious and I can't see anything wrong with that, that someone representing a brand, that recommends the brand he represents.

So, I'm not paying much attention to those parts os posts that are bringing someone down just for recommending a product they represent. That's not a reason that makes a brand better or worse. Probably, way more important than the brand, is the components used inside the product.

So, I'm thankful I got here at least 3 options. Siglent, Rigol and Korad.

BTW, my multimeter was bought on that electroshop, iirc. It's polish shop, right?

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Offline Hans578

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Re: Basic Power Supply
« Reply #29 on: July 28, 2019, 04:49:59 pm »
I would buy just 2x Peaktech 6225A. Very decent power supplies imo. Doesnt take much room either since they are switching ones. From Reichelt one costs 75 euros so 2x will be excatly 150 euros. They will send all sorts of heavier stuff up to 10kg for 10 euros only all over the Europe.
 

Offline nctnico

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Re: Basic Power Supply
« Reply #30 on: July 28, 2019, 05:50:54 pm »
BTW, my multimeter was bought on that electroshop, iirc. It's polish shop, right?
Eleshop.eu is a web shop from the Netherlands.

I would buy just 2x Peaktech 6225A. Very decent power supplies imo. Doesnt take much room either since they are switching ones. From Reichelt one costs 75 euros so 2x will be excatly 150 euros. They will send all sorts of heavier stuff up to 10kg for 10 euros only all over the Europe.
I strongly recommend against using a switching PSU for developing circuits. There is too much (electric) noise coming from these power supplies making it impossible to measure small signals. Switching power supplies are great if you need a lot of power and don't have to care about ripple and noise so much.
« Last Edit: July 28, 2019, 05:53:25 pm by nctnico »
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline ledtester

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Re: Basic Power Supply
« Reply #31 on: July 28, 2019, 06:29:44 pm »
So, I'm thankful I got here at least 3 options. Siglent, Rigol and Korad.

Since you're considering the Rigol and Korad offerings, you may be interested in this comparison video...

https://youtu.be/EpIxw90Oku8
 

Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #32 on: July 28, 2019, 07:14:37 pm »
Thanks for the video.

About the shop, that name rings a bell. I bought my multimeter from a Polish shop. Can't remember the name. They had nice prices.

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Offline tautech

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Re: Basic Power Supply
« Reply #33 on: July 29, 2019, 02:44:14 am »
Back to the topic at hand, I've got a few of the SPD-3303X-E's and I haven't had any problems with them.  Sure there are a few things I don't like, such as the lack of a keypad and the anemic third channel.  But, for the price, I think it offers a nice set of features for the money.     
I was never fan of that ^ either however the last week or so has me using a single channel SPD1305X for old LA battery recovery where I'm ofen checking current draw and voltages so to keep the battery cool.
When recovering old neglected batteries current draw can change dramatically and while I could set CC charging it doesn't give the same picture about what's going on so I might make adjustments a few times/day.

Despite the lack of a numeric keypad on Siglent PSU's the UI controls are quite adequate by using the Fine control to toggle to the digit you need to adjust and the </> to select the field for adjustment.
Encoder operation permits say *.1 to be reduced to *.0 and then to *-1.9 and the same for any decimal selected.

So while the lack of a numeric keypad might be seen by some as a hindrance to operation I don't feel it is as adjustments can still be made speedily with just the encoder, Fine and </> controls.
In this case Siglent's compact single channel PSU's don't have the front panel real estate for a numeric keypad and an encoder so the choice to reuse the same control layout of their 3ch PSU's makes some sense to me.

Avid Rabid Hobbyist
 

Offline nctnico

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Re: Basic Power Supply
« Reply #34 on: July 29, 2019, 09:43:23 am »
Sure you can make do with an encoder knob but a numeric keypad just is better. If you can buy a PSU with a numeric keypad for the same money, then buy that.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Online BillB

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Re: Basic Power Supply
« Reply #35 on: July 29, 2019, 12:58:32 pm »
Sure you can make do with an encoder knob but a numeric keypad just is better. If you can buy a PSU with a numeric keypad for the same money, then buy that.

Similar money, but the DP800 is a tad larger too.  For me, when I was first comparing I was outfitting a very small bench and space was a premium.  I traded the keypad for the (IIRC) a larger display and the smaller size.  Frankly, the majority of the time I use them it is set and forget.  If I'm really actively hunting for precise values, I'm automating anyway.       

SPD3303X: 225(W)×143(H)×278(D) mm

DP800: 239mm(W) x 157mm(H) x 418mm(D)
 

Offline TurboTom

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Re: Basic Power Supply
« Reply #36 on: July 29, 2019, 06:28:48 pm »
I guess I've got to take up the cudgels for the DP800 once again...
Besides the presence of the decimal keypad, there are two more things that I really like a lot about these PSUs: The rubber bumpers, especially those at the back, make it possible to operate the PSU resting on its rear face and to place it next to you on the floor. I found that VERY useful in several situations already. They also permit to set down the instrument on any face except the front (the terminals project).
My second "thumbs up" is the general build quality -- it's literally made like a tank. Siglent also appears to be decent qualiy but definitely not as rigid as the DP800. Korad or Owon and the likes with these flimsy reinforcement straps screwed directly to a tiny tab of the plastic front panel, making the latter a structural component of the (quite heavy) PSU, is something that I wouldn't consider adequate. But of course, electrically these power supplies may also do a good job.
Regarding the Rigol DP800 family, nowadays the issues of the early revisions that Dave highlighted, have been completely solved.
Price-wise, if you're prepared to spend 400 euros, I think some 70 or 80 more to get a more decent unit, shouldn't make much difference. If, on the other hand, your "comfort zone" stretches up to 250 euros, the only options will be the "cheapos". Depending on your application(s), you may even get along fine with a switcher, but if you only once need to check some really sensitive circuitry, you will be at a loss.

In the end, it's your decision -- we can only help with thoughts and information to find the best solution for yourself.

Cheers,
Thomas
 

Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #37 on: July 31, 2019, 10:25:57 am »
I was out for 2 days. Later when I get home I'll catch up with the thread.

Btw, the shop where I purchased my multimeter was TME.

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« Last Edit: July 31, 2019, 12:07:32 pm by psysc0rpi0n »
 

Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #38 on: August 03, 2019, 08:25:19 am »
Hi.

I also need to consider space. It's a bit of an issue because as I'm just a newbie, I have all my stuff in my laptop desk which is already being expanded with sits. I have already stuff sitting on a sit next to my laptop esk on my living room... Adding to that, my laptop printer is also on this desk, so space is an issue. So probably I'm going either for the Siglent or Rigol. But still thinking about 2x of the single channel Korad. 60V and 5A is more than enough.
 

Offline tautech

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Re: Basic Power Supply
« Reply #39 on: August 03, 2019, 09:02:00 am »
Double check measurements if you’re tight for room.
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Offline Zorc

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Re: Basic Power Supply
« Reply #40 on: August 11, 2019, 06:50:29 pm »
So probably I'm going either for the Siglent or Rigol. But still thinking about 2x of the single channel Korad. 60V and 5A is more than enough.

I'm considering almost the same.
Still in doubt, but going for 2x the Korad KA3005P seems a very attractive option. In fact, I could do with just one at the moment and I could just buy another one when needed.
Going this route would be a lot cheaper then the mentioned Siglent, and even more then te Rigol.
This guy happily seemed to have swapped his Rigol for 3x Korad: https://youtu.be/EpIxw90Oku8

Seems that most of the past issues with the Korad supply are fixed. See for example: https://youtu.be/562U6G0XTDE
Ofcourse it isn't perfect, but thats also the case for the Siglent and the Rigol.
Specs wise the korads should be a great option, but I'm still not sure how they compare to the Siglent/Rigol, quality wise (i.e. reliability, noise etc.).
On the other hand, if one of the Korads would fail on me I could just buy another one and it would still be cheaper....
Must admit I kinda like the Siglent, but not sure if it is worht the price (for my use).


 

Offline electricMN

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Re: Basic Power Supply
« Reply #41 on: August 11, 2019, 08:54:13 pm »

Very similar to the Korad KA3305P (Programmable benchtop power supply, 3 channels (2x30V/5A, 5V/3A), parallel and serial mode for the 2 30V/5A outputs, 315W total power, 10mV/1mA resolution, USB/RS232 interface) 229,- EUR incl. 19% VAT. THe siglent has a smarter display if needed/preferred and my have better internal electronics. The Korad has better resolution 10mV/1mA.

https://www.welectron.com/Korad-KA3305P-Benchtop-Power-Supply

I have this Korad and like it a lot. I preferred a linear power supply for the lower noise. The transformer in it is huge. I've only used it a handful of times but will do some extensive testing of it in the fall when I get back to Arizona for the winter. I took it apart when I got it and nothing about it scared me. YMMV.  :)
 

Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #42 on: Yesterday at 09:44:55 pm »
I still haven't bought the power supply. Priorities came in the meantime (daughter school stuff). But I'm under pressure now because the power supply I've been using for the past few years is of a friend of mine and he told me he will need it soon.

What you guys have to say about the above Korad posted in the previous post?
 

Offline J-R

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Re: Basic Power Supply
« Reply #43 on: Today at 01:02:16 am »
I still haven't bought the power supply. Priorities came in the meantime (daughter school stuff). But I'm under pressure now because the power supply I've been using for the past few years is of a friend of mine and he told me he will need it soon.

What you guys have to say about the above Korad posted in the previous post?

I'm not sure which unit you're currently interested in, but I have the KA3005D ($65) and KA6003P($80).  Bought as returns from Amazon about 2 years ago.  Replaced fans immediately with temperature controlled units (probe on heat sink).  Software is basic and buggy, but does at least add some value.  Remote control of course, more memory buttons, logging, and a step function where it will follow a list of voltage/current/time values.

The 30V 5A unit is on the workshop bench, 60V 3A programmable is on the electronics bench.

They work, I got them for a good price, I'm happy enough with them.

 

Offline psysc0rpi0n

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Re: Basic Power Supply
« Reply #44 on: Today at 09:17:39 am »
I still haven't bought the power supply. Priorities came in the meantime (daughter school stuff). But I'm under pressure now because the power supply I've been using for the past few years is of a friend of mine and he told me he will need it soon.

What you guys have to say about the above Korad posted in the previous post?

I'm not sure which unit you're currently interested in, but I have the KA3005D ($65) and KA6003P($80).  Bought as returns from Amazon about 2 years ago.  Replaced fans immediately with temperature controlled units (probe on heat sink).  Software is basic and buggy, but does at least add some value.  Remote control of course, more memory buttons, logging, and a step function where it will follow a list of voltage/current/time values.

The 30V 5A unit is on the workshop bench, 60V 3A programmable is on the electronics bench.

They work, I got them for a good price, I'm happy enough with them.

I was referring to the Korad KA3005P and Kora KA3305P. But I think I will go for the 2x Korad KA3005P. 2 real inependant channels (2 completely isolated grounds), more combined power (if 3x of this are compared with the KA3305P), cheaper because I don't need 3 of them, more space saving, more weight saving. I hope the buggy software is not that bad as you mention!

An will this "welectron" site be the cheapest site where the power supply is being sold?
« Last Edit: Today at 09:22:42 am by psysc0rpi0n »
 

Offline ledtester

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Re: Basic Power Supply
« Reply #45 on: Today at 09:46:36 am »
Let me propose another option for you:

https://youtu.be/bSkeV2ezuBs

- 32V, 5A output
- 4 digit displays for both voltage and current
- CC, OVP, OCP, OTP protection
- can be used in series and parallel configurations
- extremely lightweight and compact
- only $60
- has Voltlog's stamp of approval

It's not a linear supply, but in retrospect I've never needed a linear supply. The radio circuits / experiments I've done were all battery powered.
« Last Edit: Today at 09:52:59 am by ledtester »
 


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