Grounding of the Buss on the back of the pots question?

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JamesHealey
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Grounding of the Buss on the back of the pots question?

Post by JamesHealey »

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?
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gearhead
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Re: Grounding of the Buss on the back of the pots question?

Post by gearhead »

The outer shell of each pot provides a ground to the chassis.
JamesHealey
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Re: Grounding of the Buss on the back of the pots question?

Post by JamesHealey »

ahhh thats cool so they're fully sealed pots then for that to happen.

makes sense.
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bancika
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Re: Grounding of the Buss on the back of the pots question?

Post by bancika »

fully sealed doesn't have anything to do with that. Pot body/shaft is metal and it makes connection to chassis which is grounded.
Abstract
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Re: Grounding of the Buss on the back of the pots question?

Post by Abstract »

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.
Stupid question alert:


Then why the buss? :?:
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gahult
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Re: Grounding of the Buss on the back of the pots question?

Post by gahult »

Probably just to provide a convenient easily accessible tie point for short ground wires coming off the board.

Gary
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xk49w
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Re: Grounding of the Buss on the back of the pots question?

Post by xk49w »

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.
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Blind Lemon
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Re: Grounding of the Buss on the back of the pots question?

Post by Blind Lemon »

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. :roll:
Kregg
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Re: Grounding of the Buss on the back of the pots question?

Post by Kregg »

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. :roll:
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.
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Blind Lemon
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Re: Grounding of the Buss on the back of the pots question?

Post by Blind Lemon »

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
Kregg
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Re: Grounding of the Buss on the back of the pots question?

Post by Kregg »

"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.
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