can pot and cap be switched on tone control?

R

rabbitkiller

Guest
I am fixing the wiring on my bass guitar and the tone control may be
miswired. The how-to websites have it going

signal-> pot -> capacitor -> ground

and mine is wired

signal -> capacitor -> pot -> ground

are these equivalent circuits?

Thanks
rK
 
rabbitkiller wrote:
I am fixing the wiring on my bass guitar and the tone control may be
miswired. The how-to websites have it going

signal-> pot -> capacitor -> ground

and mine is wired

signal -> capacitor -> pot -> ground

are these equivalent circuits?

Thanks
rK
Click to expand...
No.

http://en.wikipedia.org/wiki/File:RC_Series_Filter_%28with_V%26I_Labels%29.svg

--
Les Cargill
 
"rabbitkiller" <audrale@gmx.com.fr> wrote in message
news:jmuogi$gks$1@news.albasani.net...
I am fixing the wiring on my bass guitar and the tone control may be
miswired. The how-to websites have it going

signal-> pot -> capacitor -> ground

and mine is wired

signal -> capacitor -> pot -> ground

are these equivalent circuits?
Click to expand...
Depends where you take the signal from to the next stage.

If you have simply the series connected pot & cap shunting the signal on its
way to the next stage then it doesn't matter whether the pot or cap is
grounded.

Frankly I don't see the signal being taken from the junction between the pot
& cap in this application.
 
On Sat, 21 Apr 2012 09:50:24 -0700, rabbitkiller <audrale@gmx.com.fr>
wrote:

I am fixing the wiring on my bass guitar and the tone control may be
miswired. The how-to websites have it going

signal-> pot -> capacitor -> ground

and mine is wired

signal -> capacitor -> pot -> ground

are these equivalent circuits?

Thanks
rK
I agree with Ian on this unless you can provide a schematic that would
Click to expand...
cause me to change my mind.

Tom
 
On 12-04-21 10:48 AM, Les Cargill wrote:
rabbitkiller wrote:
I am fixing the wiring on my bass guitar and the tone control may be
miswired. The how-to websites have it going

signal-> pot -> capacitor -> ground

and mine is wired

signal -> capacitor -> pot -> ground

are these equivalent circuits?

Thanks
rK

No.

http://en.wikipedia.org/wiki/File:RC_Series_Filter_%28with_V%26I_Labels%29.svg


--
Les Cargill
Click to expand...
There is the difference with my configuration the output signal isn't
taken out of the middle of the R/C junction:


Signal from Volume Pot --> Output Jack (Branch 1)
|
--> Capacitor --> Tone Pot --> Ground (Branch 2)

I should tell you that the tone control seemed to work like this.
 
On 12-04-21 12:36 PM, Ian Field wrote:
"rabbitkiller"<audrale@gmx.com.fr> wrote in message
news:jmuogi$gks$1@news.albasani.net...
I am fixing the wiring on my bass guitar and the tone control may be
miswired. The how-to websites have it going

signal-> pot -> capacitor -> ground

and mine is wired

signal -> capacitor -> pot -> ground

are these equivalent circuits?

Depends where you take the signal from to the next stage.

If you have simply the series connected pot& cap shunting the signal on its
way to the next stage then it doesn't matter whether the pot or cap is
grounded.

Frankly I don't see the signal being taken from the junction between the pot
& cap in this application.


You are right; the signal does not come out of the middle of the R/C
Click to expand...
junction. Here is a more complete description:

Signal from Volume Pot --> Output Jack (Branch 1)
|
--> Capacitor --> Tone Pot --> Ground (Branch 2)

I should add that the tone control seemed to work with this
configuration, though I don't have the greatest ear and couldn't tell if
it was optimal.
 
On 12-04-21 03:35 PM, Tom Biasi wrote:
On Sat, 21 Apr 2012 09:50:24 -0700, rabbitkiller<audrale@gmx.com.fr
wrote:

I am fixing the wiring on my bass guitar and the tone control may be
miswired. The how-to websites have it going

signal-> pot -> capacitor -> ground

and mine is wired

signal -> capacitor -> pot -> ground

are these equivalent circuits?

Thanks
rK
I agree with Ian on this unless you can provide a schematic that would
cause me to change my mind.

Tom
Click to expand...
Here is what I have in my bass guitar: Sorry for repeating it so much:

Signal from Volume Pot --> Output Jack (Branch 1)
|
--> Capacitor --> Tone Pot --> Ground (Branch 2)

And here is a typical schematic of an electric guitar:

http://www.guitarelectronics.com/product/WD2HH3T21_00/Guitar-Wiring-Diagam-2-Humbuckers3-Way-Toggle-Switch2-Volumes1-Tone.html

A lot of other sites have an identical configuration for the tone.
Musicians are not Electrical Engineers, however, and I wouldn't be
surprised if one person got it to work and everyone else copied it.

Note there is nothing connected to the node between R and C which makes
it different from the wikipedia, RC filter.


Leif
 
On Sat, 21 Apr 2012 16:15:48 -0700, rabbitkiller <audrale@gmx.com.fr>
wrote:

On 12-04-21 03:35 PM, Tom Biasi wrote:
On Sat, 21 Apr 2012 09:50:24 -0700, rabbitkiller<audrale@gmx.com.fr
wrote:

I am fixing the wiring on my bass guitar and the tone control may be
miswired. The how-to websites have it going

signal-> pot -> capacitor -> ground

and mine is wired

signal -> capacitor -> pot -> ground

are these equivalent circuits?

Thanks
rK
I agree with Ian on this unless you can provide a schematic that would
cause me to change my mind.

Tom

Here is what I have in my bass guitar: Sorry for repeating it so much:

Signal from Volume Pot --> Output Jack (Branch 1)
|
--> Capacitor --> Tone Pot --> Ground (Branch 2)

And here is a typical schematic of an electric guitar:

http://www.guitarelectronics.com/product/WD2HH3T21_00/Guitar-Wiring-Diagam-2-Humbuckers3-Way-Toggle-Switch2-Volumes1-Tone.html

A lot of other sites have an identical configuration for the tone.
Musicians are not Electrical Engineers, however, and I wouldn't be
surprised if one person got it to work and everyone else copied it.

Note there is nothing connected to the node between R and C which makes
it different from the wikipedia, RC filter.


Leif
If the pot and the cap are in series then it doesn't matter which
Click to expand...
comes first.

Tom
 
"Tom Biasi" <tombiasi@optonline.net> wrote in message
news:drv6p79u4n4phdlh9kt7gufncg9d0evbn8@4ax.com...
On Sat, 21 Apr 2012 16:15:48 -0700, rabbitkiller <audrale@gmx.com.fr
wrote:

On 12-04-21 03:35 PM, Tom Biasi wrote:
On Sat, 21 Apr 2012 09:50:24 -0700, rabbitkiller<audrale@gmx.com.fr
wrote:

I am fixing the wiring on my bass guitar and the tone control may be
miswired. The how-to websites have it going

signal-> pot -> capacitor -> ground

and mine is wired

signal -> capacitor -> pot -> ground

are these equivalent circuits?

Thanks
rK
I agree with Ian on this unless you can provide a schematic that would
cause me to change my mind.

Tom

Here is what I have in my bass guitar: Sorry for repeating it so much:

Signal from Volume Pot --> Output Jack (Branch 1)
|
--> Capacitor --> Tone Pot --> Ground (Branch 2)

And here is a typical schematic of an electric guitar:

http://www.guitarelectronics.com/product/WD2HH3T21_00/Guitar-Wiring-Diagam-2-Humbuckers3-Way-Toggle-Switch2-Volumes1-Tone.html

A lot of other sites have an identical configuration for the tone.
Musicians are not Electrical Engineers, however, and I wouldn't be
surprised if one person got it to work and everyone else copied it.

Note there is nothing connected to the node between R and C which makes
it different from the wikipedia, RC filter.


Leif
If the pot and the cap are in series then it doesn't matter which
comes first.

Tom
Click to expand...

Probably worth adding; the only reason its that particular way round in the
guitar schematic is the convenience of soldering one end of the cap to the
pot body - which is clamped to the finger plate screening foil by the
spindle nut.
 
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