Cricklewood Electronics

47dB Microphone Preamplifier Kit

This deceptively simple 2 stage transistor preamp kit provides a remarkably clear boost to allow a microphone to be used in a standard line level input.   

• Instructions x 1
• PP3 9V Battery Clip x 1 
• 1µF Boxpoly Capacitor x 2
• 100nF Ceramic Capacitor x 1
• 10µF Ceramic Capacitor x 1
• 100µF Electrolytic Capacitor x 1
• 22kΩ 1/4W Carbon Resistor x 1
• 4.7MΩ 1/4W Carbon Resistor x 1
• 1MΩ 1/4W Carbon Resistor x 1
• 3.3kΩ 1/4W Carbon Resistor x 1
• 47kΩ 1/4W Carbon Resistor x 1
• BC547B Transistor  x 2
• Neutrik NYS2152 1/4" (6.3mm) Jacks x 2
• PCB x 1

Technical Specifications:

Input Voltage: 9VDC
Gain: 47dB
THD: < 0.5%