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 Forum index » Instruments and Equipment » General Discussion
Changing pot values?
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Wild Zebra



Joined: Apr 28, 2005
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PostPosted: Tue Dec 06, 2005 9:47 am    Post subject: Changing pot values? Reply with quote  Mark this post and the followings unread

How do you change a pot value if you have a fixed pot? Adding resistors right? In series or parallel. What lug would the added resistor\resistors be assigned to?

Thanks

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Uncle Krunkus
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PostPosted: Wed Dec 07, 2005 2:40 am    Post subject: Reply with quote  Mark this post and the followings unread

If you want the one pot value to be substitutable for a number of circuits (which I think is what you want!) I would recommend modifying the circuits slightly. Keep in mind that it is alot harder to get a small pot value to behave like a large one than vice versa. So try to make the pot at least 50-100K.
The tracking of a pot is usually changed when you add resistors around it which might give you a good result, it might not. i.e. they may make a linear pot behave like a log pot (or anti-log pot) they may make a log pot work like a linear one. Or they may create a tracking curve which is nothing like either.
Check out this pdf from Elby Designs (while you're there, check out Laurie's other Synth DIY stuff, he's got heaps there!): -
http://www.elby-designs.com/documents/tailoringpotentionometers.pdf

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Wild Zebra



Joined: Apr 28, 2005
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PostPosted: Wed Dec 07, 2005 7:14 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks, that pointing me in the right direction.
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