how to make a pan control?

[Mad Scientist Jr]

I found some schematics for a simple line mixer:

http://www.electronicsteacher.com/circuits-and-diagrams/music-related-schematics/linemix.gif

How would you add a pan control to each input?

Is this just a regular potentiometer, or are pan controls some special
kind of dual pole pot that when turned to the right or left, decreases
the opposite side's signal proportionally?

Much appreciated...

 

[RichL]

I found some schematics for a simple line mixer:

http://www.electronicsteacher.com/circuits-and-diagrams/music-related-schematics/linemix.gif

How would you add a pan control to each input?

Is this just a regular potentiometer, or are pan controls some special
kind of dual pole pot that when turned to the right or left, decreases
the opposite side's signal proportionally?

Much appreciated...

The latter.

 

[John Popelish]

I found some schematics for a simple line mixer:

http://www.electronicsteacher.com/circuits-and-diagrams/music-related-schematics/linemix.gif

How would you add a pan control to each input?

Is this just a regular potentiometer, or are pan controls some special
kind of dual pole pot that when turned to the right or left, decreases
the opposite side's signal proportionally?

Much appreciated...

They are usually just individual linear or special
symmetrical taper pots stacked on a single shaft. I think
Bourns makes pots that can be assembled in an arbitrarily
large stack behind the one with the know shaft. I haven't
seen quad linked slide pots, but I am sure somebody has
produced them, at some point.

For example:
http://www.bourns.com/pdfs/PTR90.pdf
http://www.bourns.com/pdfs/8182.pdf
This one shows some special symmetrical tapers:
http://www.bourns.com/pdfs/PTH90.pdf

 

[Keith Adams]

Thats a simple mixer alright. Simple minded. After running an already weak
signal through pots and then fixed resistors your remaining signal needs to
be amplified by some means before leaving the mixer or the remaining signal
will be next to nothing.

 

[Jim]

Thats a simple mixer alright. Simple minded. After running an already weak
signal through pots and then fixed resistors your remaining signal needs to
be amplified by some means before leaving the mixer or the remaining signal
will be next to nothing.

Explain to us how that differs from using the volume control on a guitar.

I use dirt cheap pan fade pedals. I'm fairly picky about tone. They
work GREAT. ...and it's a simple single linear slider pot. Signal is
split between the two outputs. Rock the pedal one way, and the pan fade
is transparent, not really in the circuit for the one amp. I even use
two for panning guitar between three amps.

 

[bg]

Mad Scientist Jr wrote in message

I found some schematics for a simple line mixer:

http://www.electronicsteacher.com/circuits-and-diagrams/music-related-schem atics/linemix.gif

How would you add a pan control to each input?

Is this just a regular potentiometer, or are pan controls some special
kind of dual pole pot that when turned to the right or left, decreases
the opposite side's signal proportionally?

Much appreciated...

A pan pot is meant to change the position of a sound source without changing
the volume of the source. In other words, you can move the sound from left
to center to right and it should sound just as loud at any position. Only
the position changes. A simple balance pot changes both the position and
loudness. Pan pot circuits are a bit more involved than balance pot
circuits.
bg

 

[Keith Adams]

Well Jim I'm probably wrong but see it like this.. The guitar is one of the
first signals in the chain and will be sent through a varying number of
gain stages in an amplifier. A mixer is one of the last if not the last in
the chain. I've built the same type of mixer and the results were less than
desirable.

 

[Jim]

Well Jim I'm probably wrong but see it like this.. The guitar is one of the
first signals in the chain and will be sent through a varying number of
gain stages in an amplifier. A mixer is one of the last if not the last in
the chain. I've built the same type of mixer and the results were less than
desirable.

I'm talking about a passive pan fade pedal between guitar and amp, very
early in the chain.
Super Reverb
Guitar - pan fade 1 < Marshall JMP 2204
Pan fade 2 <
Mesa Mark III

Insert effects where they work the best.

 

[Marra]

I found some schematics for a simple line mixer:

http://www.electronicsteacher.com/circuits-and-diagrams/music-related...

How would you add a pan control to each input?

Is this just a regular potentiometer, or are pan controls some special
kind of dual pole pot that when turned to the right or left, decreases
the opposite side's signal proportionally?

Much appreciated...

Put a pan slider on the outputs and take the middle of slider as your
output.