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BUILD PLANS

UNCLE WORM

DIY Preamp — Full Build Docs

Build your own uncle. Solder at your own risk.

$35.00INSTANT DOWNLOAD

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WHO IS UNCLE WORM?

UNCLE WORM is the circuit we get asked about most, so we wrote everything down instead of selling it. Starve the second stage and it sags like an old amp with a tired rectifier. The docs assume you can solder but not that you know why any of this works — we explain the why.

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WARNING LABEL

Mains-free, 9V only. If your build smokes, you installed the diode backwards.

UNCLE WORM_SPECS.TXT
Difficulty
Intermediate — 62 joints, no SMD
Circuit
JFET preamp + starved-voltage stage
Enclosure
125B, template included
Build time
About 3 hours, or a whole weekend

WHAT YOU GET

  • Schematic + annotated layout (PDF)
  • Full BOM with Mouser + Tayda part numbers
  • Drill template, 1:1 printable
  • Gerber files for the PCB

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