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Robin's build #003 (take 2)

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NSJ
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@robin how sure are you? It's how they sound that I notice them. Audio taper sounds gradual, Linear sounds like a switch lol. Every A and B pot I've used has sounded as it should.


   
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swepri
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Posted by: @nsj

@swepri never seen that yet, I've used all sorts and every A has been audio taper and every B has been linear. Are you sure about the US Euro thing?

I have seen both, but did not think too much about it before reading this book, where it is explained a bit more: https://hazeguitars.com/blog/complete-guitar-wiring-introduction

 


   
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Posted by: @nsj

I've used all sorts and every A has been audio taper and every B has been linear. Are you sure about the US Euro thing?

 

Yeah same here, I never heard about this, but that does not mean it does not exist of course. For guitar I always use LOG anyway, so I order LOG pots specifically.


   
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Robin
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@nsj 

 how sure are you? 

I'm as sure as absolutely certain.


   
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@swepri every pot for guitar I ever see is either china, japan or usa made anyway, can't say I've ever seen a european pot. Seen reference to vintage pots using a C though lol


   
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@robin I've got to ask, where did you find these weirdo pots? 🤣 

 

I generally stick with alpha and cts for the most part as I can get both in metric which means an 8mm shaft, the metal nobs I use cover the nut nicely. Bournes however makes pots specifically for guitar, very easy action on them but they all seem to be imperial, 3/8ths shaft and the metal nobs don#t hide them as well.


   
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@koendb always the same, you go to bed then wake up to another change in what you know to further complicate your life 🤣


   
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Posted by: @nsj

@swepri every pot for guitar I ever see is either china, japan or usa made anyway, can't say I've ever seen a european pot. Seen reference to vintage pots using a C though lol

According to the book, C is usually code for reverse LOG pots.

 


   
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Posted by: @koendb
 

Yeah same here, I never heard about this, but that does not mean it does not exist of course. For guitar I always use LOG anyway, so I order LOG pots specifically.

 

Same here, I look for LOG or AUDIO when buying pots, not A or B.

 


   
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tv1
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Posted by: @robin

@nsj 

 how sure are you? 

I'm as sure as absolutely certain.

 

So, that's a "maybe" ??

 

The answer - of course - is just to ignore the tone pots.  Never use them ... 😉

 

Online guitar making courses – guitarmaking.co.uk


   
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Posted by: @swepri

Posted by: @nsj

@swepri never seen that yet, I've used all sorts and every A has been audio taper and every B has been linear. Are you sure about the US Euro thing?

I have seen both, but did not think too much about it before reading this book, where it is explained a bit more: https://hazeguitars.com/blog/complete-guitar-wiring-introduction

As the man says in the book (which was literally within arm's reach when I read your post!) "my advice is to ignore any codes and test".

 

Online guitar making courses – guitarmaking.co.uk


   
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Robin
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@nsj 

I've got to ask, where did you find these weirdo pots?

These were amongst a job lot of harnesses from ebay, somebody clearing out their junk boxes. I've only got myself to blame.


   
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@tv101 excuse me, I'd like to buy some pots off you, could you send them out so I can test them before paying? Thanks 🤣


   
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@swepri me three but they've always been A for audio and B for linear. No idea where anyone buys the back to front crazy pots lol


   
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@robin we won't hold it against you lol


   
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@robin Sorry for hijacking your thread. 😳 

Anyway, here is a snippet from Wikipedia on the potentiometer issue:

"A letter code may be used to identify which taper is used, but the letter code definitions are not standardized. Potentiometers made in Asia and the USA are usually marked with an "A" for logarithmic taper or a "B" for linear taper; "C" for the rarely seen reverse logarithmic taper. Others, particularly those from Europe, may be marked with an "A" for linear taper, a "C" or "B" for logarithmic taper, or an "F" for reverse logarithmic taper.[2] The code used also varies between different manufacturers. When a percentage is referenced with a non-linear taper, it relates to the resistance value at the midpoint of the shaft rotation. A 10% log taper would therefore measure 10% of the total resistance at the midpoint of the rotation; i.e. 10% log taper on a 10 kOhm potentiometer would yield 1 kOhm at the midpoint. The higher the percentage, the steeper the log curve.".

 


   
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Robin
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@swepri 

A letter code may be used to identify which taper is used, but the letter code definitions are not standardized.

Now that thats cleared up, I'll see if I can find another can of worms to open.


   
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Posted by: @robin

@swepri 

A letter code may be used to identify which taper is used, but the letter code definitions are not standardized.

Now that thats cleared up, I'll see if I can find another can of worms to open.

 

Pickup wiring colour codes??

😉

 

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@tv101 

Pickup wiring colour codes??

You're onto something there, there is a need for a definitive list of pickup colours and obviously it'll have to include random unbranded items from ebay left over from a kit builders upgrade.


   
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I think my next build is going be a ukulele, my granddaughter has taken an interest.

20240504 152717

 


   
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