Grounding schemes

[marshallguy]

https://el34world.com/charts/grounds.htm

Question,

Per this link above charts, where the circuit board is, there is a “Main board ground wire” that ties back to the chassis ground point

1. What part of the main board circuit board would that be?

2. Is the screen filter node part of the B+ filter cap section?

Thanks.

[sluckey]

1. Main board ground wire is for the power amp and bias circuits. I like to include the PI as well.

2. yes

[marshallguy]

1. Main board ground wire is for the power amp and bias circuits. I like to include the PI as well.

2. yes

Ok that thanks that how I ground too.