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double checking helps for sure

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MrDEB

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been designing the pc boards for eq tilt unit and looking at the mixer input section I realized I don't really need the op amps as I am using line level input devices (tv, mp3 player, stereo, radio)
ran through tina and no difference .
Mixer circuit I was/ am using
6 Input Mixer by IC 741 , LF351 ,TL071 Circuit Project Electronic
 

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  • lwith op amps.GIF
    lwith op amps.GIF
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  • less op amps.GIF
    less op amps.GIF
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Yes. U3 can be the mixer like this:
 

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  • Mixer.PNG
    Mixer.PNG
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rebuilding schematic/ pc board

Removing 1 op amp and moving things around and got to wondering why is R16 and C8 in circuit?
the mixer I posted has these componets but in simulating I see no difference with or without?6 Input Mixer by IC 741 , LF351 ,TL071 Circuit Project Electronic
trying to cut down on number of IC's for more pc board real estate.
I presently have 4 stereo inputs utilizing 2 1/2 TLo74's
using the revised mixer I can eliminate at least 1 TL074.
 

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  • mixer.GIF
    mixer.GIF
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  • mixer schematic.GIF
    mixer schematic.GIF
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