Solid state guitar ammplifier

Discussion in 'The Projects Forum' started by Austin Varughese, Mar 5, 2018.

  1. Austin Varughese

    Thread Starter New Member

    Feb 9, 2018
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    As posted earlier I intend on building a guitar amp and I am thinking of using a TL071 pre amp followed by a LM741 tone control and a LM1875 power amplifier I found the attached schematics are they all right or do I have to make changes also what is soft start ?
    P.S. Sorry if I posted in the wrong section. ;P
     
  2. bertus

    Administrator

    Apr 5, 2008
    18,608
    3,606
    Hello,

    I would also use the TL071's in the tone control in stead of the LM741.
    Or use a TL074 (wich contains 4 opamps) for preamp and tonecontrol, to make it more compact.

    Bertus
     
  3. Austin Varughese

    Thread Starter New Member

    Feb 9, 2018
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    Also do the resistors used have to have high power ratings or does any resistor work ?
    P.S. sorry if a noob question.
     
  4. MrChips

    Moderator

    Oct 2, 2009
    17,127
    5,296
    Power rating of resistor is determined by the calculated power dissipated by the resistor. Select a power rating that is 1.5 or 2 times the calculated power rating.

    Here is quick look-up chart to help you determine the required power rating. Use the rating at the next higher wattage.

    For example, a 1kΩ resistor has 10V across the resistor.
    Power dissipated P = V x V / R = 100/1000 = 0.1 W = close to 1/8 W
    Use ¼ W resistor.

    [​IMG]
     
  5. Austin Varughese

    Thread Starter New Member

    Feb 9, 2018
    7
    0
    Thank you for your help ;D
     
  6. Austin Varughese

    Thread Starter New Member

    Feb 9, 2018
    7
    0
    Also could you point to a schematic for the TL074 preamp and tone control
     
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