Tillman's Discrete FET Guitar Preamp
This is the famous Tillman Discrete FET preamp and can be used as preamp for piezo pickups or as a 3dB boost in general.
I ditched the J201 mentioned in the original design and replaced it with a 2N5485. Adjust R3 to set the drain to 6-7v. I used a potmeter to find the correct value.
I've placed one in front of my ValceCaster to boost the input signal and add some clarity.
Bill of materials
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Click here to see the bill-of-materials as a list or download it as a comma separated values file (.csv).