If R2 is dropping 7 volts then either C3 is defective (short circuit) or your trimmer pot isn't 5k
Again I ask, what range of voltage change do you get from the trimmer pot.
If R2 is dropping 7 volts then either C3 is defective (short circuit) or your trimmer pot isn't 5k
Again I ask, what range of voltage change do you get from the trimmer pot.