Was looking for a symmetric lab psu capable of doing +/- 60V at 4A for testing class D poweramps when I bumped into these Wanptek smps lab supplies @ aliexpress:
Bought 2 of them:
As with all mains connected CN warez I opened them up to look for obvious safety issues & check on used capacitors:
Looked Cheng up on badcaps ... better to check them out first. As expected their labeled capacitance is a bit off 🙂
Ordered some genuine Ruby's which measured more realistically 😛
Fits snuggly, just a bit worried about the merely 5 mm between the non isolated top and the metal covering ....
Better safe then sorry.
While at it, checked the secondary caps also, these did measure definitly better but with a high'ish esr.
Had a bunch of these laying around, better ESR so decided to swap these too.
The original capacitance was 470+470+1000 which I swapped for 3 x 680. Total extra cost was about 10 euro per PSU, worthy investment I think
Bought 2 of them:
As with all mains connected CN warez I opened them up to look for obvious safety issues & check on used capacitors:
Looked Cheng up on badcaps ... better to check them out first. As expected their labeled capacitance is a bit off 🙂
Ordered some genuine Ruby's which measured more realistically 😛
Fits snuggly, just a bit worried about the merely 5 mm between the non isolated top and the metal covering ....
Better safe then sorry.
While at it, checked the secondary caps also, these did measure definitly better but with a high'ish esr.
Had a bunch of these laying around, better ESR so decided to swap these too.
The original capacitance was 470+470+1000 which I swapped for 3 x 680. Total extra cost was about 10 euro per PSU, worthy investment I think
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