Guitar Preamplifier with Headphone Output

AJ Niessen

The guitar preamp is a device which allows any guitarist to practice an electric guitar without disturbing others. The device has a headphone output for so you can hear the guitar. The device is about the size of generally most FX pedals and has a metal case to protect the circuit board. It also uses a nine volt battery for power. The device receives the signal from the guitar through an RCA input.

Components:

• Zenerdiode
  • 1 4V7
• Resistors
  • 2 470K
  • 1 47k
  • 3 10k
  • 2 68
  • 1 390
  • 2 2,2
• Capacitors
  • 1 470pF
  • 1 10nF
  • 2 33nF
  • 2 100nF
  • 3 470nF
• IC Socket
  • 1 8p
• Resistor Trimmers
  • 1 100K
  • 1 1K
• Switch
• Electrolytic Capacitors
  • 3 220 uf
• RCA Connectors
  • 1 Guitar in
  • 1 Output
• Headphone Connector
  • 1 3,5mm Stereophone
• LED
  • 3mm red
• IC
  • 1 NE5532A
• Battery Snap
• 3 4mm Bolts
• 3 8mm M3 Spacers
• 3 Lock Washers
• 3 6mm M3 Bolts
• 1 Volume Knob
• Metal Housing\

The Assembly was quite easy. The resistors were taped together in the order of their placement. The directions were very clear on where things went. After completing it's assembly I gave it a test. I previously thought I might have mounted the IC socket incorrectly. I Actually mounted that correctly but reversed the positive and negative wires for the battery. After fixing that problem I tried again and had no success. I attempted some resoldering and came up with the same results.

Despite that it did not function I enjoyed building it.