Stereo Preamplifier with adjustment tone


Many times we needed to use a simple circuit of preamplifier, with few components and facility of made. This circuit use a opamp. the Motorola, TCA5550, that contains a double amplifier, as outputs for the adjust of volume, balance, treble and bass. These adjustment of all parameters become from a line monophonic linear potesometers, increasing by far the facility of manufacture. The placement these potesometers should become as much as possible, more near in IC1, so that is minimised the noise. The circuit does not require big current in order to it work.

Circuit diagram

Circuit diagram

Part List

  • R1-2-3-4=100 Kohms
  • RV1-2-3-4=100 Kohms Linear pot.
  • C1-2-8-9=4.7uF 63V
  • C3-4=100nF 100V MKT
  • C5-14=100uF 40V
  • C6-7=47nF 100V MKT
  • C10-11-12-13=220nF 100V MKT
  • C15-16=10uF 63V
  • IC1=TCA5500 Motorola