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Purchasing a lab power supply

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aruna1:
hi guys
collected some money and trying to purchase my FIRST benchtop power supply.

I looked in aliexpress for a supply that fits to my budget and I have four options

Atten APS-3003
http://www.aliexpress.com/item/DHL-EMS-Free-shipping-ATTEN-APS3003Si-mA-Class-Adjustable-Linear-Regulated-0-30V-3A-DC-Power/574726749.html

Arts APS-3005 (same as atten i guess but with 5A)
http://www.aliexpress.com/item/DHL-EMS-Free-shipping-ATTEN-APS3005SI-DC-Power-Supply-single-channel-low-ripple-and-noise-high/577694277.html

RXN-303
http://www.aliexpress.com/item/Free-shipping-RXN-303D-LINEAR-DC-ADJUSTABLE-POWER-SUPPLY/693660747.html


DPS-305CF
http://www.aliexpress.com/item/5Ps-220Vof10V-Adjustable-dc-Digital-Control-30V-5A-Voltage-Power-Supply-DPS-305CF-storage-lock-for/729353120.html

I'm little biased to DPS-305CF as it has output on-off button and program memory.
but it is missing ability to adjust the voltage real time. (for example to check voltage cut-off circuit we can turn the voltage adjust knob of other power supplies. but since this has keypad i cannot do it)

so what do you guys think? which one should I go for?

thanks  :-//

Bored@Work:
In the end it is your choice. Such is life. Your risk, your money.

What you have there is a roundup of very typical low-end Chinese power supplies. There are hundreds of them out there, some are build OK, others are pure crap. You can't judge them from the outside, since manufacturers copy from each other or use the same enclosure suppliers. You can't even trust the same "brand" and type, because building quality varies, manufacturers change the inside without any indication, and some "brands" get faked.

In general, the ones you have picked there form Ali all seem to be a bit expensive for the typical Chinese supply. I have seen cheaper ones new on ebay.

For general bench usage I would go for one with a real knob, not a keyboard.

jpb:
I guess that you're not located in the UK and power supplies are heavy and expensive to ship. But just in case, I've been very happy with my TTi PL320QMD which I got from

http://www.test-measure.co.uk/

The supply is an old model TTi, hence sold cheap but it was brand new and shipped directly from TTi.

aruna1:

--- Quote from: Bored@Work on March 03, 2013, 01:13:02 pm ---In the end it is your choice. Such is life. Your risk, your money.

In general, the ones you have picked there form Ali all seem to be a bit expensive for the typical Chinese supply. I have seen cheaper ones new on ebay.

For general bench usage I would go for one with a real knob, not a keyboard.

--- End quote ---

Hi price on ali express is cheaper than ebay. at least when considering shipping to Sri Lanka. Atten seems good brand among chinese items like Rigol, dont you think? There are cheaper once at ebay with analog volt/current meters but I'm looking for supply that has digital display


--- Quote from: jpb on March 03, 2013, 02:09:29 pm ---I guess that you're not located in the UK and power supplies are heavy and expensive to ship. But just in case, I've been very happy with my TTi PL320QMD which I got from

http://www.test-measure.co.uk/

The supply is an old model TTi, hence sold cheap but it was brand new and shipped directly from TTi.

--- End quote ---

Hi
 I'm from Sri Lanka.

krish2487:
We have been through the same over and over again...

Any older HP/Agilent/TTi/Tek power supplies anyday over ny of the newer chinese crap.

Just search around patiently on ebay for a used pedigree power supply.

At the most you ll have to replace the electrolytics and maybe the power transistors..

The newer chinese power supplies are a disaster waiting to happen.

Ebay is your best friend in this case.. You ll get a good deal including shipping to Sri Lanka if you are patient..

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