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instek vs Mastech DC POWER SUPPLY

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SnakeBite:
Hello,

i want to buy a new PS and i can't decide which.
i was thinking about INSTEK PSP-2010 which is good PS from a good company at good price range ($275 USD) and also has a great power range 20V @ 10A MAX.
but then i saw the Mastech PS which also have larger power rang(30v @ 10A) and beter price ($149USD).

my only doubt is which one is beter PS from durability and accuracy point of view.
what do you think about Mastech company is it a good company or another low end Chinese company?
thanks
 Ido

http://cgi.ebay.com/MASTECH-VARIABLE-REGULATED-DC-P-S-HY3010E-0-30V-0-10A-/120636320893?pt=LH_DefaultDomain_0&hash=item1c167c2c7d

http://www.tequipment.net/InstekPSP2010.html

saturation:
There is a review of some Mastech PSU on this forum, just search for it, and our experience buying it from a distributor in CA [ who also sells through eBay] and I'd rate is 6-7 stars /10.  Just know, you won't get much after purchase support or service even if it has a warranty.  So, when you buy it, keep this in mind.

http://www.mastechpowersupply.com/

You should also check out the latest models, which offer some better features for the same money, such as fine adjustment control.

I see you've selected a linear PSU, and these are easy to service.  The devices are well made, in 1980s style technology and have good electronic characteristics.

Instek is a top Taiwan based company, and they do give good support, you have may even a local support system in Israel.  The PSU you've linked is a switching PSU, and those are more complicated to service, and worth getting from a reputable company.  If you compare the cost of the Mastech switching PSU of a similar type, the difference is not very much and will not be worth the hassle if things go wrong.  They are much more difficult to self service.


--- Quote from: SnakeBite on November 16, 2010, 01:16:42 pm ---Hello,

i want to buy a new PS and i can't decide which.
i was thinking about INSTEK PSP-2010 which is good PS from a good company at good price range ($275 USD) and also has a great power range 20V @ 10A MAX.
but then i saw the Mastech PS which also have larger power rang(30v @ 10A) and beter price ($149USD).

my only doubt is which one is beter PS from durability and accuracy point of view.
what do you think about Mastech company is it a good company or another low end Chinese company?
thanks
 Ido

http://cgi.ebay.com/MASTECH-VARIABLE-REGULATED-DC-P-S-HY3010E-0-30V-0-10A-/120636320893?pt=LH_DefaultDomain_0&hash=item1c167c2c7d

http://www.tequipment.net/InstekPSP2010.html



--- End quote ---

SnakeBite:
the two PS i chose is SMPS the Mastech i chose is SMPS not linar.

anyways ... i didn't understand what you recommand more the instek or the  Mastech in terms of safty, durability and accuracy .

i really don't care about the service difficulty just to choose the beter one.


my terms of good PS are (by order):
accuracy
safty
durability
price


Ido

cybergibbons:
They are very different power supplies.

I own the GW-Instek PSP-2010 - I bought it as it was cheap, and also because it is programmable. I can use a PC to measure voltage, current and power, as well as control it.

It's a nice bit of kit. Exceeds the specifications listed in the manual. Response to dynamic loads is fairly good, but I wouldn't run an audio amp off it. It's very efficient - I was running a 5V 80mA load day in, day out for almost 6 months on it. The one thing I don't like is the very narrow viewing angle on the LCD display - I much prefer LED displays, but then it does show a lot of information.

There are a couple of photos of the insides on Flickr: http://www.flickr.com/photos/cybergibbons/sets/72157624189901913/. In line with the other pieces of GW-Instek gear I have, the construction is good. It looks better than the Mastech internals I have seen.

saturation:
Sorry, snakebite, you are right, the Mastech is SMPS.  My mistake.

http://mastechpowersupply.com/dc-power-supply/switching-power-supply/mastech-regulated-variable-dc-power-supply-30v-10a-hy3010e/prod_14.html

My rating was not so much the product alone, but the seller.  I'm sorry.

I do not own or know of the SMPS made by Mastech, but their linear supply, which I do own, is well made.

There are a threads of Mastech supplies at the rcgroups forum and their experience covers over 2 years of use:

http://www.rcgroups.com/forums/showthread.php?t=833118


As for your requirement in bold my 1803 supply meets all your requirements after 7 months of ownership, but it is linear:

accuracy: stable down to the uV, typically mV
safety: short circuit, fuse, protected
durability: no stats, but given RCgroup experience, its been around for at least 2006 or longer and popular, no long term issues
price: very high value for price




--- Quote from: SnakeBite on November 16, 2010, 02:25:28 pm ---the two PS i chose is SMPS the Mastech i chose is SMPS not linar.

anyways ... i didn't understand what you recommand more the instek or the  Mastech in terms of safty, durability and accuracy .

i really don't care about the service difficulty just to choose the beter one.


my terms of good PS are (by order):
accuracy
safty
durability
price


Ido

--- End quote ---

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