Instrument preamp


Posted on Dec 19, 2012

The input impedance is the value of potentiometer Rl. If your instrument has extra-deep bass, change capacitor Cl to 0.5 mF. What appears to be an extra part in the feedback loop is a brightening tone control. The basic feedback from the op amp's output (pin 6) to the inverting input (pin 2) consists of resistor R7, and the series connection of resistor R4 and capacitor C3, which produce a voltage gain of almost 5 (almost 14 dB). That should be more extra oomph than usually needed.


Instrument preamp
Click here to download the full size of the above Circuit.

If the circuit is somewhat short on bass response, increase the value of capacitor C3 to 1 to 10 µ. Start with 1 µ¥ and increase the value until you get the bass effect you want.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Dual Litz Honeycomb Coils Crystal Radio
TX-500 500mW FM Transmitter
mosfet Driving LED strip from microcontroller
quick jobs h bridge circuit to drive
The converter IC circuit diagram
Synchronous motor thyristor excitation circuit



Top