shielded wire help please!

Started by carboncomp, June 06, 2011, 02:47:38 PM

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carboncomp

Could i get some help with shielded wire?

got one end stripped to just the core, and the other end stripped to 2 wires (core and shield) now I know I have to connect the shieldto ground............but im building a positive ground range mater.....so where would I ground the shilled for the input wire?

Im using this kit from www.PigeonFX.com and a DPDT switch as in the diagram.

http://pigeonfx.com/layouts/layoutrange.html


John Lyons

In a PNP circuit the red battery wire is ground.
You connect the braid/shield to ground in either
PNP or NPN. Ground is ground in both.  ;)
Basic Audio Pedals
www.basicaudio.net/

carboncomp

Thank you Mr Lyons

So I could ground it at any of the following points?


theundeadelvis

I believe you're going to want to ground it either at the jack (where you red dot is), or the red dot on the far right of your eyelet board.
If it ain't broke...   ...it will be soon.

carboncomp

Quote from: theundeadelvis on June 06, 2011, 04:19:53 PM
I believe you're going to want to ground it either at the jack (where you red dot is), or the red dot on the far right of your eyelet board.

Why just those two point.....Is Ground not Ground regardless of where it is on the build?  :icon_confused:


Govmnt_Lacky

Quote from: carboncomp on June 06, 2011, 08:47:12 PM
Why just those two point.....Is Ground not Ground regardless of where it is on the build?  :icon_confused:

NO...

The points on the right of your diagram are DIRECTLY connected to your source ground.

The other points need to go through resistors, capacitors, switches, etc. in order to get to ground.

Besides, there is a pretty big hole on the jack to put lots of ground wires. Why fight it?  :icon_lol:

Good Luck  ;D
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for an amount of 'up to and including my life.'

John Lyons

The only ground points are the jack on the right and the top right of the
terminal strip. At the jack is best, as mentioned above. Short wire, next to
the wire you're shielding...
Basic Audio Pedals
www.basicaudio.net/

polaris26

As a related aside, the term 'positive ground' has always bugged me.  It is a misnomer and misleading at best.  Ground, by definition, is the reference point from which all voltages are measured, be they positive or negative.  Therefore it cannot be positive or negative, because it is by definition neutral or at zero potential to itself. 

A better way of saying it would be that these so-called 'positive ground' circuits are really 'negative supply' circuits, because they use a negative supply (-9V usually) in reference to ground.   

Dave

In the heart of the Poconos!

MikeH

Quote from: polaris26 on June 06, 2011, 09:52:10 PM
As a related aside, the term 'positive ground' has always bugged me.  It is a misnomer and misleading at best.  Ground, by definition, is the reference point from which all voltages are measured, be they positive or negative.  Therefore it cannot be positive or negative, because it is by definition neutral or at zero potential to itself. 

A better way of saying it would be that these so-called 'positive ground' circuits are really 'negative supply' circuits, because they use a negative supply (-9V usually) in reference to ground.   

Dave


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