# Need help reading a schematic, is this a 220k log b pot?

This is saying a 220k log b potentiometer for the tone pot VR8, correct? That is such an extremely odd value, but I don't see that sort of notation very often either and I wanted to make sure I'm not misinterpreting. Thanks!

• B is a linear pot. A is log. Jan 12 '18 at 16:44
• Can you add your comment as an answer so I can give you credit? Thanks! Jan 12 '18 at 16:45
• I don't have a reference, unfortunately. Without it the answer won't be credible. If I have one, I will add. Jan 12 '18 at 16:46
• Now I have it. Check it out. Jan 12 '18 at 16:56
• @EugeneSh. also on the wiki page for pots under heading "Resistance–position relationship" Jan 12 '18 at 16:57

## 1 Answer

According to the table given on this page, "A" stands for logarithmic potentiometer (Audio), and B is standing for linear one (In Asia and America at least):

• Got to love the discrepancies from country to country. >_< Jan 12 '18 at 16:58
• @TomCarpenter Yeah... well, at least the B thing is unique. Jan 12 '18 at 16:59
• The taper goes by manufacturer, not country. Yes there are a typical schemes, but the manufacturer sets that label. Jan 12 '18 at 22:58
• I hate it when someone edits my posts, and gets it wrong... and I get negative marks because of it.... Jan 13 '18 at 0:01