I need some advice on pot selection for gain adjustment of an op-amp. What I need to know is, should I use a linear taper or an audio (log) taper pot?
For testing purposes on the breadboard, I have put a liner taper trimpot there. (in the final, it will be a panel-mount pot) I looked at the waveform in the oscilloscope, and the amplitude seems to respond linearly. But this is a subject that I don't know too much about.
The op-amps in question are in an audio mixer, containing two pre-amps and one for the actual mix. Pictured is a simplified schematic of one of the pre-amps, with the resistor in question circled:
For testing purposes on the breadboard, I have put a liner taper trimpot there. (in the final, it will be a panel-mount pot) I looked at the waveform in the oscilloscope, and the amplitude seems to respond linearly. But this is a subject that I don't know too much about.
The op-amps in question are in an audio mixer, containing two pre-amps and one for the actual mix. Pictured is a simplified schematic of one of the pre-amps, with the resistor in question circled: