Knackered Pots

[stewblack]

Hi. I need to source replacement pots for an active bass. Google has not been my friend 😥

Not got involved in this kind of game before so any advice very welcome. Up to and including "pay someone else to do it"

[itu]

B relates to linear and numbers to 30 kilo ohms. So you should be after around 25 - 30 kilo ohm linear pot.

It should be noted, that B sometimes relates to logarithmic pot. Sadly, there are no standards here.

[Islander]

A simple rule to remember is that volume pots are normally logarithmic (log) and tone pots are linear (lin).  The standard value nearest the 30k in your circuit would be 27k and that should work just fine.  The rest is down to the spindle size and type, the physical size of the pot and the type of connection (through PCB or wiring tag).  You'll need a decent soldering iron and either some desoldering wick or a solder sucker to remove it.   Good luck.

[stewblack]

Thank you for the advice. Getting the old one off might be fun too

[John Cribbin]

Define Knackered.

Are they actually broken, or noisy / scratchy?

 

[stewblack]

1 hour ago, John Cribbin said:

Define Knackered.

Are they actually broken, or noisy / scratchy?

 

Not just noisy. A plastic part inside disintigrated and jammed one up the other never stops turning 

These are knackered not just in need of a clean.

[Chienmortbb]

On 26/01/2019 at 08:00, itu said:

B relates to linear and numbers to 30 kilo ohms. So you should be after around 25 - 30 kilo ohm linear pot.

It should be noted, that B sometimes relates to logarithmic pot. Sadly, there are no standards here.

Actually the British standard is A = Linear B = Log but of course the Colonials had  to be different and their standard is the other way round. As they influenced all the rest of the world most pots are A = Log or as they call it Audio  taper. 

[itu]

OK, here is a guide that I often refer to: http://www.resistorguide.com/potentiometer/ . Easy to read and has lots of information. Enjoy.

[stewblack]

Thanks folks!