Blowing fuses

[Studio270]

I keep blowing the fuse when I connect the amp board.
I'm sure I have the board wired right. Can anyone tell if I have the power supply wired right to the transformer?
TIA

 

[rayma]

I keep blowing the fuse when I connect the amp board.

Try a a soft start with a Variac, and maybe a somewhat larger and/or slow blow, fuse.

 

[sofaspud]

Disconnect the amp board from the power supply.
Verify the power supply before connecting it back to the amp.

Blowing fuses means you have a serious wiring/circuit issue.
Better pictures and info will help to solve it.

If it's true that the fuse blows when connecting the amp board, I wouldn't be so sure it is wired right.

 

[Studio270]

Ok,heres the whole mess.

Power supply

Mains

Amp

Both Amp and P/S

This is for a power amp for my pre amp so I just need mono.
I can't believe I 'm not able to figure this out. I'm sure it's something dumb.🙂
Thanks for helping me.

 

[Philfr]

Hi,
How many diodes you have ?
http://www.diyaudio.com/forums/chip-amps/224887-please-help-chipamp-lm3886-amp-blowing-fuses.html
Phil.

 

[Studio270]

Thanks Phil,
That looks like it will work.I have all 8 diodes in the power supply.

 

[troystg]

Apexjr.com has a really good pictorial on using a common return transformer.. I will see if I can find the link..

 

[troystg]

http://www.apexjr.com/images/PSU-CT2.jpeg

 

[troystg]

Apexjr.com under the miscellaneous items...

 

[Studio270]

Thanks troystg

 

[troystg]

No worries that's what the forum is for.. Good luck and let us know how it turns out.

 

[turk 182]

before you kill anymore fuses or potentially your chipamps look up the "dim bulb tester" threads and info i think it's worth your time and money and should save you from releasing the "magic white smoke" from your project.

 

[Studio270]

I'm ditching the original transformer and I got a toroidal. I believe this simplifies thing for me.
Thanks everyone for your help.