Step 01.01: Drill 1590B Enclosure
Step-drill 12mm hole for stomp switch and 7mm holes for pots.
M1
Enclosure Drilling & Prep
Audio & InstrumentsAdvancedWeekend build
Vintage British JTM Overdrive Pedal
Classic plexi breakup in a compact 1590B die-cast enclosure featuring JFET gain stages and true-bypass switching.
dsejavitz
· updated about 1 month agoBuild progress · 0/2 steps0%
0 of 2 steps completed
Step 02.01: Trimming JFET Drain Voltage
Measure drain voltages with multimeter and adjust trimpot to 4.5V DC.
Vintage British JTM Overdrive Pedal
Bill of Materials & Tools
| Have | Item Name | Qty | Unit | Vendor |
|---|---|---|---|---|
| Hammond 1590B Aluminum Enclosure | 1 | pcs | Amazon | |
| 3PDT Stomp Switch | 1 | pcs | Amazon |
Milestones & Build Steps
Milestone 01 · Enclosure Drilling & Prep
Center-punch hole markings for 3PDT switch, potentiometers, and audio jacks.
Step 01.01·Drill 1590B Enclosure
Step-drill 12mm hole for stomp switch and 7mm holes for pots.
Milestone 02 · Circuit Assembly & Calibration
Populate 2N5457 JFET transistors and trim bias voltages.
Step 02.01·Trimming JFET Drain Voltage
Measure drain voltages with multimeter and adjust trimpot to 4.5V DC.
