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Used Crate V33 guitar amplifier restored and modified to clean up tone and create a third channel.
Used Crate V33 guitar amplifier restored and modified to clean up tone and create a third channel.
Above are a few pictures of the device my peers, Ethan Bush and William Westhafer, and I worked on. The top left image is one before any modification, and the bottom left is just after reinstalling the boards and adding a third channel with a DPDT switch.
Above are a few pictures of the device my peers, Ethan Bush and William Westhafer, and I worked on. The top left image is one before any modification, and the bottom left is just after reinstalling the boards and adding a third channel with a DPDT switch.
Below are some closer and clear pictures of the circuit board before and after modification.
Below are some closer and clear pictures of the circuit board before and after modification.
Before
After
To the right are the images of both the origional schematics and the modified schematics. During the process of replacing, removing, and switching parts, we noticed that the circuit board had been modified before, causing an added level of complication.
To the right are the images of both the origional schematics and the modified schematics. During the process of replacing, removing, and switching parts, we noticed that the circuit board had been modified before, causing an added level of complication.
We also did not have all of the exact resistors and capacitors, so we ran other components either in parallel or series depending on what we had and what we needed. Below is an example of this work around in the DPDT switch up close. The resistors are in series, while the capacitors are in parallel.
We also did not have all of the exact resistors and capacitors, so we ran other components either in parallel or series depending on what we had and what we needed. Below is an example of this work around in the DPDT switch up close. The resistors are in series, while the capacitors are in parallel.
Here is the solo to Nuclear by Mike Oldfield before and after the modification at the same volume and preamp settings.
Here is the solo to Nuclear by Mike Oldfield before and after the modification at the same volume and preamp settings.
Some parts were sourced from Bucknell's offered free parts, while others were either repurposed from other projects or devices (like the DPDT switch) or were already personally available. The schematic was sent to us from a friend of a friend, but no information is known about the creator.
Some parts were sourced from Bucknell's offered free parts, while others were either repurposed from other projects or devices (like the DPDT switch) or were already personally available. The schematic was sent to us from a friend of a friend, but no information is known about the creator.
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