DIY Mic Pre Kits, Lunchbox Mic Preamp Kits, Power Supply Kits

Hi Owel!

I've bought from you 1 year ago this psu for my strips.

just finishing the soldering and when I test I've got only something like 19v on both 44/48v!

I've got your AL power tx and when I check the voltage on black/yellow secondary, I get only 10v!

i think I've made the wiring well for the tx (230v)
so, grey/vio connected together on primary and red/orange connected on the secondary

black=AC1
yellow=AC2

any idea where the issue could be?

cheers.
Jr.

Make sure you're switching your multimeter to AC or DC voltage setting when making a voltage reading. The secondary winding is AC voltage. The output of the PSU is DC voltage.

What is the AC voltage reading you're getting on the BLK and YELLOW wires of the power transformer?

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thanks for your answer Owel!

the only value I can get on my multimer is 11V in AC on secondary.
and 19.6V on 44/48V, same for both and on AC too.
it doesn't show anything on DC.

wow...while I was writing these lines and testing...I blown a fuse from the house.
I wanted to see how much current I've got from the wall...

it's weird, I have 230v but testing with AC and when I tried DC...wooosh...no more fuse. and some bengal fire in my rack.
strange cause in France we have DC right?

I hope I didn't killed the psu.

yikes. I think you have an error in your transformer wiring. Please review all your work on wiring the AC mains.

the output on the trafo secondary should be higher than 11V ac if you wired it properly.

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thanks I will re-check that...even if I followed your guide.

but maybe...

Can you email me pictures of your work, showing the wiring, the top side and underside of the PCB, and closeup shot of the soldering on the PCB.

Thanks.

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yep, I will check and if it the same I will take a picture...but it's time to go to work...

hello Owel.

so, the wiring of the tx is good.

gray and violet wired together and 220v between blue and brown.
secondary, orange and red wired together and black yellow to the psu.

this the cleanest shot I can get of the soldering.

Do you have a picture of the wiring?

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the wiring of the tx?

Yes. I want to see everything, how it's laid out, how it's wired, the condition of your work, etc. I can't be there to see your work, so pictures is the next best thing.

My guess is there is a short somewhere, either in your wiring, or on the PCB.

If you feel like this is starting to be complicated, you can send your PSU board and transformer back to me for repair, I'll test and fix it, then send it back to you. No charge on labor, just pay for shipping.

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thanks Owel, but I want to do this myself...
you know what, I will try to rewire the tx since it seems the first issue and if the issue still there I will shout for help!

thanks for your kindness.

I let you know whay's goin on!

Jr.

hi Owel!

ok I think the issue come from my multimeter.
rewired everythings = same value

so I tried an other tx (R type) 18v/18v = same value 10v on the secondary:shock:

I will try to borrow a real one to someone!

cheers!

You're the second person I've encountered with a broken multimeter that built my PSU kits.

They were not getting the correct voltage readings and it turned out to be their meter's fault!

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