Grounding of the Buss on the back of the pots question?
Moderators: pompeiisneaks, Colossal
-
- Posts: 477
- Joined: Thu Aug 28, 2008 5:34 pm
- Location: Leeds, UK
Grounding of the Buss on the back of the pots question?
I've noticed on a few layouts and designs that this isn't grounded? surely it is? does the guitar input jack ground it to the chassis or does it ground at star ground?
Re: Grounding of the Buss on the back of the pots question?
The outer shell of each pot provides a ground to the chassis.
-
- Posts: 477
- Joined: Thu Aug 28, 2008 5:34 pm
- Location: Leeds, UK
Re: Grounding of the Buss on the back of the pots question?
ahhh thats cool so they're fully sealed pots then for that to happen.
makes sense.
makes sense.
Re: Grounding of the Buss on the back of the pots question?
fully sealed doesn't have anything to do with that. Pot body/shaft is metal and it makes connection to chassis which is grounded.
Re: Grounding of the Buss on the back of the pots question?
Stupid question alert:bancika wrote:fully sealed doesn't have anything to do with that. Pot body/shaft is metal and it makes connection to chassis which is grounded.
Then why the buss?
Re: Grounding of the Buss on the back of the pots question?
Probably just to provide a convenient easily accessible tie point for short ground wires coming off the board.
Gary
Gary
In the 60's people took acid to make the world weird. Now the world is weird , and they take Prozac to make it normal.
Re: Grounding of the Buss on the back of the pots question?
It also gives a decent ground reference - like the Fender brass ground plate. Relying on grounding through the pot bushings and front panel is probably not the best approach.
- Blind Lemon
- Posts: 147
- Joined: Sat Nov 10, 2007 3:28 am
- Location: Okie
Re: Grounding of the Buss on the back of the pots question?
I have always wondered about this myself........we strive to eliminate grnd loops and then we intentionally create one by putting a bus across the back of the pots.
Re: Grounding of the Buss on the back of the pots question?
I think the problem with ground loop mainly occurs when the grounds are coming from different sources and running parallel through poorly insulated wire. That's why Ken was a stickler (from what I've read) at placing wires and electronics just so.Blind Lemon wrote:I have always wondered about this myself........we strive to eliminate grnd loops and then we intentionally create one by putting a bus across the back of the pots.
- Blind Lemon
- Posts: 147
- Joined: Sat Nov 10, 2007 3:28 am
- Location: Okie
Re: Grounding of the Buss on the back of the pots question?
I'm sure what you're saying is correct , but, my understanding of a ground loop is a component grounded in 2 locations creating a loop antenna.
http://www.epanorama.net/documents/grou ... asics.html
http://www.trinitysoundcompany.com/grounding.html
Quick reading.
BL
http://www.epanorama.net/documents/grou ... asics.html
http://www.trinitysoundcompany.com/grounding.html
Quick reading.
BL
Re: Grounding of the Buss on the back of the pots question?
"A ground loop occurs when there is more than one ground connection path between two pieces of equipment."
That's why, when I built my home theater, I plugged all of my equipment into one power source, ran wires from different sources (speaker, projector & lighting) at least one foot away from one another and crossed at a 90 degree angle.
That's why, when I built my home theater, I plugged all of my equipment into one power source, ran wires from different sources (speaker, projector & lighting) at least one foot away from one another and crossed at a 90 degree angle.