power supply grounding in a stereo amplifier (2x mono amp) in 1 chassis

[mrjayviper]

some info:

• each channel has its own power supply and transformer
• ground for the power supply is derived from the center-tapped transformer (see screenshot below)
• only 1 AC input for the 2 power supplies

question: should I connect the 2 power supply ground together? I'm only asking since I want to install a ground loop breaker.

Thanks!

 

[Speedskater]

Each channel's DC supply common and audio circuit common should attach to the chassis at a single point near that channel's input connectors.

 

[amplidude]

Short wires, heavy gauge, twisted, there is a pdf Andrew Russel regarding proper grounding.
A few minutes later. Here it is..

 

[Speedskater]

The transformer center tap is at the wrong end of the DC supply common.
Use the DC supply output point.
* * * * * * * * * *
I would totally ignore that poor Andrew Russel paper!

 

[amplidude]

You are absolutely right speedskater, my pdf recommendation came from memory. I found pdf and uploaded, without looking, it is the wrong pdf, the uploaded pdf is rubbish, what i meant was the pdf written by hifisonix regarding amplifier wirring.

 

[Bonsai]

Short wires, heavy gauge, twisted, there is a pdf Andrew Russel regarding proper grounding.
A few minutes later. Here it is..

This not me 😳. It’s absolute rubbish.

 

[Bonsai]

The transformer center tap is at the wrong end of the DC supply common.
Use the DC supply output point.
* * * * * * * * * *
I would totally ignore that poor Andrew Russel paper!

This not me 😳. It’s absolute rubbish.

 

[Bonsai]

This may help

https://hifisonix.com/power-amplifiers/how-to-wire-up-a-dual-mono-bloc-amplifier/

https://hifisonix.com/technical/ground-loops/

(NOT from Russ Andrew’s - a completely different individual - but from Andrew Russell!)