[sdiy] Deciphering Roland 100 filter schematic

[Philippe Derenne]

Hi Aaron and all,

My information about A, B and C pots is : it depends on the country :

Europe and USA :
    A (or no letter) : linear
    B : log
    C : anti-log

Japan :
    A (or no letter) : log
    B : linear
    C : anti-log
Do Japanese people have special ears ? ;^)

Have a look there (pages 2 and 4) : 
http://www.farnell.com/datasheets/19801.pdf

And if you look at the Roland schematic, upper right corner, the "phones 
level" pot is a B-type : this one at least must be a log one...
Now what if your schematic is "made in Japan" ???  ;^)

Hope this helps...

Phil.

----- Original Message ----- 
From: "Ben Lincoln" <blincoln at eventualdecline.com>
To: "SDIY" <synth-diy at dropmix.xs4all.nl>
Sent: Monday, April 21, 2008 10:58 PM
Subject: RE: [sdiy] Deciphering Roland 100 filter schematic


> On Mon, April 21, 2008 1:47 pm, Gene Stopp said:
>
>> 1) Taper?
>
> That's what I was thinking. Alpha pots have an A ("Audio") or B ("There is
> no 'B' in 'linear'") in their part numbers to indicate taper.
>
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