Circuit Guitar Pre-amp BF245 and BF256
Guitar preamp based on an
FET BF245 and BF256 300x151 Guitar Pre amp based on an FET BF245 and BF256Guitar preamp, based on an FET BF245 and BF256 type.
Very easy to build, operate with 9 V battery. Unlikeprevious FET based Guitar pre amp which has gain of close to 1, which is presented here provide the gain (if all goes well).
The preamp gain is determined by the value of resistors R3 and R4 respectively located in the branches Drain (D) and Source (S) of the
FET. Potentiometer RV1, which provides a parallel, more or less pronounced on the capacitor C2 resistor R3, can make the variable gain which can vary from about 15 dB to about 25 dB.
The maximum gain is obtained when the capacitor C2 is completely in parallel on R3, that is when the potentiometer RV1, mounted variable resistor, and a position of minimum resistance (cursor R3). The gain is minimal when the cursor is on the side of C2.