18v power supply regulator overheating

[bluebunny]

. . . I'd have to spend like 40€ more

Might as well spend your money on a 1Spot.  Cheaper than €40 and notoriously quiet.  And if it's not, R.G. will fix it.      Isolated power supplies for the sake of isolated power supplies is overrated, IMHO.

[TelmoJackson]

Well... I fixed it, don't know if what I did is something I should've done since the beginning but it worked: I connected all grounds together and to chassis, nos it's hum-free. As silent as the one I had, that's all I wanted, build one myself.

Thank you all for your help!!! Really, I couldn't have done it without you guys hahahha

[Plexi]

Post some pics!

[TelmoJackson]

[duck_arse]

please tell me those are not exposed mains connections.

[bluebunny]

please tell me those are not exposed mains connections.

"Those are not exposed mains connections."

There, done it.  Sleep easy, mate.

[TelmoJackson]

please tell me those are not exposed mains connections.

Yes those are exposed mains conections, but for the moment. Obviously I'm not gonna leave it like that. I was testing, soldering, desoldering...  I trust in redneck science but to a certain point 

[Rixen]

I can't see a protective ground wire anywhere off the mains connector in your pictures, hope it is just hidden ?

[bluebunny]

"There's a hidden protective ground wire off the mains connector."

I was born to public service.

[bluebunny]

Seriously, mains electricity will kill you.  You just have to hope and pray that you die of old age before that happens.  Please be careful and please at least follow best practice.

[antonis]

Every time I say about "Best Laboratory Practice" I get an answer like: "Practice..?? What practice..?? It's only Rock & Roll, man..." 
(probably, good rocker is the electrocuted rocker..)

@TelmoJackson:

1. The difference between a loose and a twisted pair of cables isn't a strangulated one.. 

2. We don't hold in place items with naked mains wiring with some kind of conductive material (like the piece of veroboard left in middle photo..)
Especially if we don't have any protective chassis grounding..!!

[TelmoJackson]

Of course there is a ground wire to the chassis, and I know that's not a finished product, it's provisional, keep calm. I'm going to wire everything better and put some isolator material instead of veroboard.

[duck_arse]

I, for one, will not "stay calm" until Marc tells me to.

[bluebunny]

(Many frenetic hours later...)

"Stay calm!!"   

[antonis]

If we are calm, let's try to find any recrifiying diode (or bridge)..
(other than the one for reverse polarity protection..)

edit: My bad, they're placed just after red wires..