Differnces between Potensiometers

[billysgtr]

I need a linear B50k pot. Is there any difference between the following types or I could use both?

http://www.banzaimusic.com/CTS-Pot-50k-REVERSE-log.html 

and

http://www.banzaimusic.com/Alpha-Guitar-Pot-50k-lin.html

...what is the reverse log at the first url?

[GibsonGM]

The "audio" (or "log") and REVERSE log (reverse audio, really) refers to the 'taper' of the pot.    When you turn a linear pot, it responds in a linear fashion....each division of its rotation gives the same change.  So, at 1/4, and 3/4 rotation, you would be equal resistances from either end of the pot.

We use log pots to mimic the response of the ear, which is not a straight line.  So you tend to find them as volume controls.

Log taper pots follow a logarithmic scale - not every part of the rotation gives you the same amount of change..... read up on this here: http://www.geofex.com/article_folders/potsecrets/potscret.htm

To answer your question, you need the SECOND link, the 50k LINEAR one.  There IS a difference, and it's one you probably wouldn't like

[knutolai]

Anti-Log and Lin pots are not the same.

[billysgtr]

Great, Thank you both!  
It is about the reverb 2 byoc.
I also need to replace the other pot too. But I don't know which type is better for that too.
Actually don't know which to choose in here http://www.banzaimusic.com/search.php?mode=search&page=1

The manual says C10k (DWELL)
http://buildyourownclone.com/potc10kpc.html

There is some noise while turning the pots

[tommycataus]

Hey Billy, you probably want to start by reading the following article:

http://www.geofex.com/article_folders/potsecrets/potscret.htm

If you check out the graph out will give you a brief guide to how the pots work. The two most common are linear (B) which has an even change in resistance throughout its rotation, and logarithmic (A) which has very little change through most of its rotation, as it is bunched up at one end.

Reverse log (C) type pots are not used as often and have most of their change in resistance bunched up at the other end to a logarithmic pot as the name suggests. Each does the same thing but the taper of the pot means you will have to rotate it to a different point to get the same results. You want the one in the second link.

Edit: what those guys said

[billysgtr]

#Reposting for an answer#
Great, Thanks all of you!  icon_smile
It is about the reverb 2 byoc.
I also need to replace the other pot too. But I don't know which type is better for that too.
Actually don't know which to choose in here www.banzaimusic.com/Potentiometers/

The manual says C10k (DWELL)
http://buildyourownclone.com/potc10kpc.html

There is some noise while turning the pots

[bloxstompboxes]

You may just want to try cleaning the pots first with a contact cleaner. I use CRC brand cleaner. You just spray it into an opening in the pot and turn it a few times. Should clean it right up. If the pot truely is worn out, the resistive material on the board in the pot the wiper slides on is worn away, then you will have to change them.

[billysgtr]

I tried to clean them but nothing.
I need to change them. Any suggestions?

[billysgtr]

I think I find it!
This http://buildyourownclone.com/potc10kpc.html

is the same type with this http://www.banzaimusic.com/CTS-Potentiometer-10k-log.html

It is type C, Log(audio). Like tommycataus said

Am I right?

[duck_arse]

indeed, yes, you are right. "C" = reverse log = anti-log = reverse audio. A taper is for volume controls. B taper is for other things, linear in nature. C taper is for odd controls, like the gain control in a fet boost, or an oscillator rate control, or dwell controls (whatever that is).

and then there is the "G" taper found in the tubescreamer tone control.

[bloxstompboxes]

indeed, yes, you are right. "C" = reverse log = anti-log = reverse audio. A taper is for volume controls. B taper is for other things, linear in nature. C taper is for odd controls, like the gain control in a fet boost, or an oscillator rate control, or dwell controls (whatever that is).

and then there is the "G" taper found in the tubescreamer tone control.

I have always heard it referred to as the W taper, but I googled and now I see the G taper also. Hmmm.