Guitar Pre-amp based on an FET BF245 and BF256

Published:2013/3/14 2:45:00 Author:Ecco | Keyword: Guitar Pre-amp , FET | From:SeekIC

Guitar 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). Guitar preamp InputThe input impedance is mainly determined by the value of R1 and R2, the FET with an input impedance of several tens of MOhm. It is approximately 1 MB and corresponds more or less, even to the value of R2. The coupling between the sensor (microphone) and FET guitar is done through the capacitive coupling capacitor C1 associated with R2 forms a highpass filter whose cutoff frequency is low enough (about 30 Hz at -3 dB with a slope 6 dB / octave).



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