JFET preamp
A preamplifier with Junction Field Effect Transistor (JFET) makes your guitar sounds great, operating in similar manner to the vacuum tubes. This circuit is very simple to build and can be used as a booster.Steps
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Created by DHEA
Status: Active
Status: Active
JFET preamp Step 1 of 5
A preamplifier with Junction Field Effect Transistor (JFET) makes your guitar sounds great, operating in similar manner to the vacuum tubes. This circuit is very simple to build and can be also used as a booster. Additionally, the high input impedance will enhance the bright tone of your guitar.
With this PCB you can use trimmers to easily adjust the bias point and behavior of the transistor. You can use a voltmeter to measure the voltage of the source (Vs) and drain (Vd) on the PCB pads.
Materials list
- 1x JFET Preamp DIY PCB
- 1x 47NF 0.047UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
- 1x 220PF 50V CERAMIC DISC CAPACITOR
- 1x 100UF 35V 105C RADIAL ELECTROLYTIC CAPACITOR 6X11MM
- 1x J201 JFET N-CHANNEL AMPLIFIER TRANSISTOR
- 1x 1M OHM 1/4W 1% METAL FILM RESISTOR
- 1x 33K OHM 1/4W 1% METAL FILM RESISTOR
- 1x 5K OHM TRIMMER POTENTIOMETER CERMET 1 TURN 3362P
- 1x 50K OHM TRIMMER POTENTIOMETER CERMET 1 TURN 3362P
- 1x 100K OHM LOGARITHMIC TAPER POTENTIOMETER
