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Topic: Ernie Ball VP jr taper |
Ed Baker
From:
Connecticut, USA
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Posted 9 Aug 2022 6:38 am |
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Is there a passive way to change the volume taper of an Ernie Ball VPjr?
I'd like to not come up with a way that doesn't need an external power supply.
Right now, it seems the only reasonable power control is in the last 10% of the pedal travel range. |
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Mike Auman
From:
North Texas, USA
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Posted 9 Aug 2022 2:35 pm
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Here's how the manufacturer does it, they added a "taper" switch that puts a resistor across the potentiometer and shifts the taper. Yours probably has a "log" taper, if so 50% rotation only gives you about 20% of the resistance which is why it changes suddenly at toe-down. Adding this resistor will bring it closer to a "linear" taper which gives you 50% of resistance at 50% rotation with less bunching-up at the end. I'm assuming you have the 6180 VP Jr. with the 250k ohm pot, as shown here. If so, a resistor around 220k to 250k ohms would work fine. You can just wire it from the tip lead of the "in" jack to the tip lead of the "out" jack, or across the two lugs of the pot that go to those spots (lugs 2 & 3.)
_________________
Long-time guitar player, now wrestling with lap steel. |
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Ed Baker
From:
Connecticut, USA
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Posted 10 Aug 2022 5:43 am
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Nice.
Thank you. |
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