cheap/chinese LPSU's - minefield?

[Monge]

@the_doc735 Thanks for creating this thread ? 

I would be nice to have one place for looking at a Cheap LPSU.

I’ve heard good things about this for a router

https://www.ebay.com/itm/131867485038?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

It’s a little more expensive.

Cheers Monge

[Monge]

33 minutes ago, look&listen said:

 

For $187 you get R-core xformer, sigma11 variant reg. circuit, but crap full wave bridge rectifier.

 

Maybe look at

https://www.ebay.com/itm/Finished-100VA-Ultra-Low-Noise-Linear-Power-Supply-Ouptut-9v-12v-19v-24v-R1716/141770497380?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

 

For $156 get above, but Ultra-Fast Recovery diodes, bigger box to separate weak fields & heat, different S11 variant. I have one for 9 mo. & all Ok (power server).

 

But for all el-cheapo LPSU's, not just these, important to observe 2 rules!

1) Never use close to rated output specs. Asking for trouble & @Superdad has shown regulation breakdown, even unit failure.

2) Always inspect inside new unit for any issues- loose parts, bad soldering, &c. (QA cost money, not spent on el-cheapo's)

 

@look&listen Thanks for correcting me and the advice.

For ny own router I’m using a BOTW P&P Eco.

I have 2 TP link MC200CM 9V/0.6A version 2.23 in a drawer that I want to try again.

So this one Will be OK?

https://www.ebay.co.uk/itm/30W-Hifi-Ultra-low-noise-Linear-Power-supply-DC9V-2A-R-core-transformer-L6-51/192581769256

Thanks In advance.

Cheers Monge

[Monge]

8 minutes ago, mourip said:

 

I have been using a Teradak unit for several years. They even have an internal potentiometer that you can use to tweak the voltage a bit.

 

https://www.ebay.com/itm/TeraDak-DC-30W-TOUCH-DC9V-2A-Hi-Fi-Audio-Linear-Power-Supply-/130906580297?hash=item1e7aa3e549

@mourip Thanks ? So this one with LT3045 In series or parallel would be nice for TP link MC200CM version 2.23 I Think.

Cheers Monge

[Monge]

14 hours ago, mourip said:

 

I just put my MC200CM's back into my system. I am running the "clean" side from a 5V LPS and the other side from the standard SMPS brick. Works great on 5v.

Thanks for testing the MC200CM at 5V ? It’s apreciated here.

Cheers Monge