Vantek power supply - Page 1
Forum section: electronics / general

author: Gall
author_rank: Frequent Contributor
timestamp: August 22, 2011, 11:30:01 am
content: Hello,Does anybody have any experience with this one:Vantek 0-32V 5A 2 channel Programmable DC Power Supplyhttp://www.goodluckbuy.com/vantek-0-32v-5a-2-channel-programmable-dc-power-supply-.htmlAre there any similar models? I'd like to have a general purpose benchtop power supply with at least two outputs that may be tied to the same voltage (for opamp-based circuits). High power and/or higher voltage is good but not really needed.Now I'm using an old HY3003 one. It has only one output. I'd like to upgrade.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 22, 2011, 11:51:59 am
content: This product is made by having in mind exclusively the Chinese market.At list all the indications on the face plate this is what they are saying.About the EEV, in about two years time of operation, we managed to educate our self's and build an opinion about the branded DMM and oscilloscopes, but not about the modern PSU, mostly because the people are looking at the totally uncharted market,so to find something cheap.I am not that positive that you will find a user review about it, but you are always welcome to post yours as first one.

author: Gall
author_rank: Frequent Contributor
timestamp: August 22, 2011, 12:17:43 pm
content: Yes, it is for Chinese market. They also have single-output models with English text on panels. I have no idea about three-output export model. It may be under different brand of the same manufacturer.Another question: are there any PSUs with similar look? This one has a good chance to be just another clone of something.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 22, 2011, 12:32:41 pm
content: Quote from: Gall on August 22, 2011, 12:17:43 pmAll those PSU this days looks alike, there is no chance to say if it is a clone or not by looking the banana plugs arrangement.

author: Gall
author_rank: Frequent Contributor
timestamp: August 22, 2011, 01:53:23 pm
content: Found it: seems that "YoRi" is another name for this one. Even the model number is the same.I've never seen another PSU with banana plug arrangement like this, it's quite unique

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 22, 2011, 03:49:46 pm
content: About the carrying loop at the top I can see similarities.But not in anything else.http://www.18show.cn/show/197477/Product_5680007.html

author: Gall
author_rank: Frequent Contributor
timestamp: August 22, 2011, 04:53:17 pm
content: There was a PDF catalog of YoRi somewhere else, it shows the same model.Looks like the site itself shows wrong photos: they even have a photo of an digital scope instead of a cheap PSU at one of their pages!Strange.

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 22, 2011, 06:05:06 pm
content: The major question is : Do you have any authorized reseller locally ? (about those brands )If not, its risky to get a product just because of the picture, especially at the 300$ range.Your old PSU looks to be a Mastech, did you search their own range about something more advanced ?

author: Gall
author_rank: Frequent Contributor
timestamp: August 23, 2011, 09:15:50 am
content: Yes, my old one is Mastech. They have wide choice of simple power supplies but almost no advanced.Here in Russia there are no local resellers at all. There are some local companies that rebrand cheap Chinese equipment (maybe with additional QC but I'm not sure, usually Russian QC is even worse than Chinese). They are quite expensive (i.e. Atten scope for the price of Instek).I'm looking for a three-channel, quite compact programmable bench PSU for $300 or such. I'm ready to tweak it a bit if needed (no need to be very good out of the box).

author: SgtRock
author_rank: Unknown
timestamp: August 23, 2011, 01:06:57 pm
content: Dear Gall:--Heretofore, Vantec has only been known for making computer power supplies. Reports on the computer PSUs are that they are middle of the road in price and quality.--I am a little wary, because they do not provide a very good picture or description. I would try to get more information before buying this one.--As always, I would recommend you consider buying a name brand PSU used on eBay, with a guarantee.--What ever you do, I wish you the best of luck. Best Regards???

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 23, 2011, 05:21:30 pm
content: Quote from: Gall on August 23, 2011, 09:15:50 amNo way PedroThe most practical would be to get two adjustable ones ( single channel )And make a third of your own, combining many LM7805 / LM7806 / LM7812 ... up to 24V or more.

author: ciccio
author_rank: Frequent Contributor
timestamp: August 23, 2011, 07:11:20 pm
content: Quote from: Kiriakos-GR on August 22, 2011, 03:49:46 pmFrom the linked site:There is passage outputting, a passage exportations is adjustable whole a passage output to fix - Use four LEDS display, distinguish to show four passage output’s electric voltage values is worth with the electric current - Have the stable electric voltage, stabilize the electric current - Follow the exportation automaticallyWhat does it mean?Does somebody is really considering buying something starting from these specifications?

author: Gall
author_rank: Frequent Contributor
timestamp: August 23, 2011, 07:58:39 pm
content: Quote from: Kiriakos-GR on August 23, 2011, 05:21:30 pmOk, adjustable with DAC and two buttons for reference source. Potentiometers tend to wear out producing dangerous pulses at output. Mastech produces something in that range but there are no dealers at all.It's kind of lottery. It IS possible to make a cheap programmable PSU, microcontroleers are cheap nowadays. It IS possible to make it small, powerful and multichannel, UC3842 is cheap too, look at Meanwell products for example. This Chinese PSU MAY be a nice combination of these low-cost chips. It also MAY be absolute crap ("please bring itbackto the trashcan!"). I saw both variants before.QuoteIt's translated from Chinese via Google. Ok, the documentation is useless.QuoteNot Vantec, Vantek. Some Chinese manufacturers use this trick. I.e. my old good multimeter is branded "Sunwa" (despite its name, surprisingly good, works for 14 years already without losing precision. Not as safe as major brands but I use it for low voltages only anyway.)

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: August 23, 2011, 09:42:19 pm
content: Quote from: Gall on August 23, 2011, 07:58:39 pmOk I have one last suggestion and I believe that is usable.Start using the ebay.de link, there is a true wide market in Germany (that is almost close to your door.)Make a list of some branded models that you have some interest, and I will personally help you, to locate one of them in the German ebay.My own Kenwood supports remote control operation, and master slave operation.With out knowing it, you gave me an wonderful idea , to use the remote connection of it, in a way to have selectable presets,instead of rotating the knob all the time.And so I can use it, as to was programmable but with out any software.( I will make an complete presentation about it soon )And so I am ready to return the favor, when ever you are ready too.

author: SgtRock
author_rank: Unknown
timestamp: August 24, 2011, 12:13:39 am
content: Dear Gall:--Sorry about the Vantek vs Vantec mix up, I made an erroneous assumption.http://www.taiwantrade.com.tw/MAIN/en_front/en_search/product/brief_companyList.do?TaiwanOnly=true&INVNUM=27280172&isShowCRM=1--Vantek is a Taiwanese company, probably better than a mainland co. Vantec is in Freemont CA. My mistake. I notice by the way that Cyrillic posts become gibberish on this forum. "HE XOPOIIIO" Best RegardsClear Ether

author: Gall
author_rank: Frequent Contributor
timestamp: August 24, 2011, 06:29:07 am
content: Quote from: Kiriakos-GR on August 23, 2011, 09:42:19 pmThank you for this idea, I always forget about it after usin ebay.com. I can speak German...I'm still investigating cheap Chinese things, too. Maybe there is anything that can be at least treated as a nice DIY kit.

author: Gall
author_rank: Frequent Contributor
timestamp: August 24, 2011, 07:37:31 am
content: Upd: PDF for the cheap one:http://2.dx1.elecfans.com/n/elecfans.com-DPS%203000P%CD%A8%D3%C3%CA%FD%D7%D6%B4%E6%B4%A2%D6%B1%C1%F7%B5%E7%D4%B4.pdf

author: Bored@Work
author_rank: Super Contributor
timestamp: August 24, 2011, 06:57:53 pm
content: Quote from: Gall on August 23, 2011, 09:15:50 amAdd 50%, i.e. make it $450, and you get a UniSource P6100. And compact it is. Although they are a little bit hard to come by.

author: Gall
author_rank: Frequent Contributor
timestamp: August 25, 2011, 10:36:29 am
content: Thank you!Just curious. I saw a lot of photos of PSUs recently. They have only few layouts:* Like Mastech HY3003, GW Instek etc., two meters on top and four potentiometers* Like larger Mastech, twice as large with the same layout (high power 1-channel or 2-3 channels)* small programmable like this:http://img.alibaba.com/wsphoto/v0/346802952/140_ITech_IT6720_60V_5A_100W_Programmable_DC_Power_Supply.jpg_200x200.jpg(NOT clones, just similar)* another similar one (all clones, since they all have strange manual range switch)* larger Rigol + clones* many different models all having one encoder or buttons only, dot matrix display.There is no other model that looks similar to this one by Vantek (3 channels, 2 encoders, no numeric keypad, 7-segment LEDs). Hm?.. I was sure it is clone of something...