I am building a bass with duncan lighting rods and as i was working out the electronics i realized while i was looking on the web I can't find a 100k push pull pot. (100k is what is recommended by duncan for their active pickups) I am trying not to have to drill 2 extra holes for 2 indapendent switches I'd like to use to push pull pots. My question is can I modify a 25k pot to work as a 100k pot? If no one knows for sure, can anyone tell me how pots are rated, for example is a 25k pot the max resistance it can apply or the minimum resistance it applies to a given circut.
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Need help with a pot problem
- Thread starter asdfcrash
- Start date
- Jun 25, 2006
- 3,226
- 341
- Disclosures
- Owner, Pike Amplification & 3Leaf Audio
My first thought when I read your thread title was that you should find some better help than TalkBass.
a 25 K pot would be able to give 25, 000 ohms of resistance between points when its turned fully to one direction.
Think of them like a variable resistor (well, that is all they really are!)
Think of them like a variable resistor (well, that is all they really are!)
If you haven't gathered, im not an electronics guru. I found this web site Invalid Link Removed where a guy turned a 1meg pot into a 500k pot by adding a resistor across the outside terminals. This is where Im confused and Im sure its a very basic electronics issue. I would have thought that you could only increase resistance by adding a resistance not lower it. I did find on a basic electronics tutorial that when a pot is rated it is the max amount of resistance it can apply (ie a 25k pot is 0 - 25000 ohms) so Im now guessing that if I wanted a 100k max resistance I could add a 75k resistor in line but now I could never reach 0 resistance I'd allways be bound to 75k minimum. I really don't know what that would mean for tone and volume in a guitar, but If anyone can explain some of the basics of how would work, or if anyone knows a good book or web site that explains its I'd be very greatful
Google series and parallel circuit laws. Whether or not something is wired in series or parallel effects the total resistance in different ways. I'd go into to it more but I don't feel like writing a small book
You shouldn't have much trouble finding info on that topic though. Good luck.
You shouldn't have much trouble finding info on that topic though. Good luck.
If you used a 250k pot with a 150-160k across the terminals you should get pretty close to 100k
http://www.1728.com/resistrs.htm
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http://www.1728.com/resistrs.htm
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cool. Those different 100k pots are a pain to find, try to find one with solid shaft but long threads
I asked Seymour Duncan about using 50k or 250k with their preamps but never got an answer. They did answer all the other questions I had though..
I know you can swap the "wafers" out of CTS pots. That meaning the actual pot material. The carbon. If CTS makes a push pull, buy a 100K and whatever push pull you find and swap the wafers.
In theory, it should work.
In theory, it should work.
www.banzaieffects.com has almost any kind of pots with almost any kind of imaginable configuration (imagine triple stacked mono & stereo pot with switch...
)
Or you wish to go cheaper, follow a calculation here to simulate a pot using bigger pot.: Invalid Link Removed
)Or you wish to go cheaper, follow a calculation here to simulate a pot using bigger pot.: Invalid Link Removed
