Need help with power supply

[bluegti]

Originally I was going to build two mono-block amps in a separate chassis, but now I have decided to put both amps in a single chassis. I have two Avel Y236503 160VA 22V+22V Toroidal Transformers and a LM3886 Dual Mono Kit Contents from chipamp.com.

After looking at the Power supply configuration based off of a unregulated design by Carlos Filipe I believe that I should connect the primary and secondary wires as follows:

• Blue/Violet twisted to 110V mains
• Grey/Brown twisted to 0V mains
• Black to AC1 on power supply board
• Red to AC1-- on power supply board
• Orange to AC2 on power supply board
• Yellow to AC2-- on power supply board

I read Chip amp power supply - a beginners guide, but now I'm confused. I believe the configuration referenced above has two bridge rectifiers but I want to be sure.

• Please confirm that I have my connections correct.
• Do I need to implement the loop breaker circuit as descrived in the begninner's guide, or can I simply run a wire from the CHG (chassis ground) on the circuit board to a chassis ground point?
• Anything else I should consider?

Thanks for you help... I'm almost done!

[Nuuk]

If you have four rectifier diodes, then you have a single bridge, if you have eight diodes, then you have a dual bridge.

[pacificblue]

Originally posted by bluegti

• Blue/Violet twisted to 110V mains
• Grey/Brown twisted to 0V mains
• Black to AC1 on power supply board
• Red to AC1-- on power supply board
• Orange to AC2 on power supply board
• Yellow to AC2-- on power supply board

Yes.

Originally posted by bluegti
Do I need to implement the loop breaker circuit as descrived in the begninner's guide, or can I simply run a wire from the CHG (chassis ground) on the circuit board to a chassis ground point?

You should use the wire. If that results in a ground loop, i. e. hum, then you can try to solve that with the loop breaker circuit.