Power Supply heating the capacitors and burning line filter fuses immediately

[FauxFrench]

Thanks, I did not go sufficiently back in the postings. At least the problem is solved.

 

[claredes]

Indeed unusual. A guess, the capacitors do not handle the close to 70V well and leak. With your 12V transformer you can test if they are polarized correctly (according to what is marked on the capacitors). If you leave them for longer time with the big transformer they will probably explode.

I was able to solve the problem.
It was a silly mistake. Good thing it did not damage the capacitors.

 

[claredes]

Where did you source these 10mF's from?
Best regards!

I bought it at an electronics component store in my city.

 

[Kay Pirinha]

Is this store trustworthy, that means, are you sure that they didn't sell you faked 'lytics? We've yet had many examples here .
Best regards!

 

[addysoftware]

The capacitors are master brands? are they thruthful? I saw fake chinese capacitors movies on youtube. These are much smaller either in capacity or in voltage, and inserted in big capacitor cases. The manufacture is not made by hand and it does not appear obvious from external view.

 

[addysoftware]

Ah; i jumped over page two. Problem is solved, succes from now on.

 

[claredes]

Is this store trustworthy, that means, are you sure that they didn't sell you faked 'lytics? We've yet had many examples here .
Best regards!

Unfortunately I can not state with conviction that the capacitors are true.
The store is a reference in my city.
All I have to do is hope that they are original.
The measurements made with the capacimeter gave a result within the expected value of the capacitors.

 

[claredes]

The capacitors are master brands? are they thruthful? I saw fake chinese capacitors movies on youtube. These are much smaller either in capacity or in voltage, and inserted in big capacitor cases. The manufacture is not made by hand and it does not appear obvious from external view.

I really hope they are true and reliable as they were not cheap.
But after fixing the problem of assembly, everything started to work well, without heating and without high power consumption.

 

[claredes]

The capacitors are master brands? are they thruthful? I saw fake chinese capacitors movies on youtube. These are much smaller either in capacity or in voltage, and inserted in big capacitor cases. The manufacture is not made by hand and it does not appear obvious from external view.

I really hope they are true and reliable as they were not cheap.
But after fixing the problem of assembly, everything started to work well, without heating and without high power consumption.

 

[FauxFrench]

I really hope they are true and reliable as they were not cheap.
But after fixing the problem of assembly, everything started to work well, without heating and without high power consumption.

After having been polarized wrong with some 17Vdc from your 12-0-12Vac transformer and then exposed to 70Vdc, again the wrong way and until they heated importantly, they seem still to work. My suspicion of "fake" items causing part of the problem with this history would be none. You are lucky they show no clear defects following that treatment.

 

[bluerooster]

Interesting. While the rectifier bridge doesn't really care if it's installed backwards, the components downstream do.

Backwards rectifier means that downstream components, while installed correctly, will be backwards.

 

[claredes]

After having been polarized wrong with some 17Vdc from your 12-0-12Vac transformer and then exposed to 70Vdc, again the wrong way and until they heated importantly, they seem still to work. My suspicion of "fake" items causing part of the problem with this history would be none. You are lucky they show no clear defects following that treatment.

I was really lucky that I did not damage the capacitors.
Now with everything assembled properly, the power supply works just fine.
I changed the board I made manually for an industrialized one, it has a better finish and a thicker layer of copper.

See pictures of how the project is at this moment.

 

[FauxFrench]

I was really lucky that I did not damage the capacitors.
Now with everything assembled properly, the power supply works just fine.
I changed the board I made manually for an industrialized one, it has a better finish and a thicker layer of copper.

See pictures of how the project is at this moment.

Looks really nice. Good craftsman-ship.