Question about the Four Output Isolated Power Supply

[verdolaga14]

HI,

I'm planning to build the Four Output Isolated Power Supply of GGG. I have a question about the polarity that goes to the transformers. Following the layout posted in the site:

http://www.generalguitargadgets.com/diagrams/ss-ps4_lo.gif

The positive goes to the right leg of tranformer 1 and the left leg of transformer 2. Is it alright? It is not supposed to change the polarities that go to the bridge rectifiers in the other side of the transformers?

Cheers,
Juan
PS: sorry about my english.

[fpaul]

I've built 3 of them and they work great.  I'm not the most knowledgable person but here's what I think is the answer.  Someone correct me if I'm wrong.

The negative leads from the jacks go to the negative leads on the caps so that looks right.  Same for the positive leads. Each transformer has two isolated secondaries, that's how you get four isolated outputs.  Since it's AC there isn't polarity on the secondaries because it's a sine wave.  Polarity is only an issue after it its rectified to DC.

[verdolaga14]

Thank you very much Frank !

I'm not an expert neither but your answer sounds logical. I forgot the AC DC issue, you're right. I will try it...

Cheers,
Juan

[dudleydoright]

  Without looking I must say anything upstream of the bridge rectifier is ac and switches polarity approximately 60 times a second in the US and 50 times a second in Europe. The connections to be sure are not swapped are the primary and seconday. The rectifier will delegate + & - for your DC voltage.  Just a lowly electrician so I could be wrong, but, not this time. Good luck and be careful with the primary contact.