madbeanpedals::forum

Projects => How Do I? Beginner's Paradise. => Topic started by: IWouldLikeToDIY on December 29, 2017, 01:29:00 PM

Title: quick question about potentiometers
Post by: IWouldLikeToDIY on December 29, 2017, 01:29:00 PM
Hello everyone !

Ive just started my first project and and would need a 50kB, 10kA and 25kB ...
I have absolutelly NO IDEA what kA/B is ... Can someone tell me what resistance they got (ohms) ??

thank you , wish you a happy new year and pardon please my english ;)
Title: Re: quick question about potentiometers
Post by: Scruffie on December 29, 2017, 01:34:01 PM
50k (50,000 ohms) is the value, A/B/C is the taper. A is Logarithmic, B is Linear, C is Reverse Logarithmic.
Title: Re: quick question about potentiometers
Post by: Zigcat on December 29, 2017, 04:45:21 PM
And W is wtf.
Title: Re: quick question about potentiometers
Post by: somnif on December 29, 2017, 04:58:07 PM
W is log from 0 to 5, reverse-log from 5 to 10. Fine control at the extremes, coarse control in the middle.
Title: Re: quick question about potentiometers
Post by: madbean on December 29, 2017, 05:51:58 PM
In very rare cases, A can be used for linear and B for Audio. Only seen that mentioned in the UK, though. For everyone else it is the other way round (99% of the time).
Title: Re: quick question about potentiometers
Post by: EBK on December 29, 2017, 08:42:47 PM
Quote from: madbean on December 29, 2017, 05:51:58 PM
In very rare cases, A can be used for linear and B for Audio. Only seen that mentioned in the UK, though. For everyone else it is the other way round (99% of the time).
Translation:  It's ok to feel a little confused.
Around 1 out of 100 people seem to inadvertently get the linear/audio, B/A thing backwards.  For instance, there was this one British guy.... :P
Title: Re: quick question about potentiometers
Post by: peterc on December 29, 2017, 10:27:40 PM
QuoteIn very rare cases, A can be used for linear and B for Audio. Only seen that mentioned in the UK, though.

I have only seen this on 2 brands of pots, Omeg and Piher. YMMV though....

Peter
Title: Re: quick question about potentiometers
Post by: Valid on December 30, 2017, 02:05:15 AM
Many DOD pedals have alpha pots that are marked with a W. But they don't seem to be
log->center<-rev.log.
Does anybody what they are?
B?


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