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Topic: Simple Wiring Question for Bigsby Volume/Tone Pedal |
Thomas de Bourbon
From:
California, USA
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Posted 20 Nov 2023 1:34 pm |
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Just bought a bigsby volume/tone pedal but only the volume works, not the tone. I took it apart to look inside and it seems like the tone pot isn't connected where it's supposed to be. Anyone have any help? I am a decent solder but I don't know shit about wiring. I feel like it's pretty simple...
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Jeff Highland
From:
New South Wales, Australia
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Posted 20 Nov 2023 1:47 pm
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Well you have one lug of the pot connected to a capacitor thru to ground so you would want to connect from hot on the output jack to the centre lug (wiper) on the pot.
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Cody Farwell
From:
Sunland, CA
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Posted 20 Nov 2023 5:29 pm
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| Looks like it's also missing the string for the tone pot. |
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Landon Jarrel
From:
Atlanta, GA, USA
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Posted 20 Nov 2023 7:04 pm
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| Cody Farwell wrote: |
| Looks like it's also missing the string for the tone pot. |
Indeed. Fortunately, a shoestring usually works fine. Also, it may be worth getting a replacement capacitor because there is a chance it has degraded over time and actually turned more into a resistor. This happens to "paper-in-oil" capacitors where the paper, if not acid-free, will degrade and cause capacitance issues. The same paper degradation is what turns old books yellow-orange. 
I'm not sure of the factory value in the Bigsby pedals, but .047 and .022 microfarad are "ballpark".
Here's how to wire the Fender version of the Volume-Tone pedal. Circuitry-wise, they are basically the same so it'll work.
(From this discussion: https://bb.steelguitarforum.com/viewtopic.php?t=315822&sid=2c568baa9f17ab9e0cd69b8de0b9d671) |
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