The links you provided seemed to either have expired or are broken, but I happened to have gotten one of those variable 30 volt, 10 amp, Chinese made power supply units for Christmas (my daughter was asking me what I wanted for Christmas, so I figured why not that) ;-) Anyway, it is over current protected so you can't pull much over 10 amps, even with the leads dead shorted. There's pretty fine voltage control from 0 all the way to 30 volts and the ripple is only a few millivolts. May not be suitable for a professional lab environment, but at ~$80, including free shipping ($0 for me, since it was a gift), it's certainly good enough for my purposes ;-)
David
Sent from my iPhone
> On Jan 10, 2015, at 2:10 PM, Tedd Payne <teddp2@xxxxxxxxxxx> wrote:
>
> My apologies if this is a little off topic, but does anyone here have
> first-hand experience, or factual info, on the quality and reliability of
> these inexpensive Chinese power supplies?
>
>
>
> http://www.ebay.com/itm/WEP-30V-10A-10AMP-Precision-Variable-DC-Power-Supply
> -Pro-Digital-Adjustable-/151534803659?pt=LH_DefaultDomain_0
> <http://www.ebay.com/itm/WEP-30V-10A-10AMP-Precision-Variable-DC-Power-Suppl
> y-Pro-Digital-Adjustable-/151534803659?pt=LH_DefaultDomain_0&hash=item23482d
> 9acb> &hash=item23482d9acb
>
>
>
> ebay seems to have several of the same basic supply, from different sellers,
> with different labeling and pricing.
>
>
>
> Thanks in advance!
>
>
>
> Tedd
>
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