Hey All,
I've been having fun w/ building distortion circuits for keyboards and guitars. I'm working w/ the LF347 op amp. I've noticed three things:
1) There's still a hint of original signal going through the circuit when the circuit isn't powered. I'm guessing a higher valued resistor on the input would solve this problem. (2.2k, 5k, etc.)
2) There is a distinct hum in the output. I'm thinking of a passive low pass filter for this.
3) I noticed that when turning the volume on the keyboard amp w/ this circuit connected, I noticed there is a sudden jump in volume. And it then slowly progresses as the volume is turned up. This is not the case when the circuit is not connected.
Datasheet on the op amp:
http://amiga.serveftp.net/Datasheets/LF347-QuadOp-amp.pdf
I've been having fun w/ building distortion circuits for keyboards and guitars. I'm working w/ the LF347 op amp. I've noticed three things:
1) There's still a hint of original signal going through the circuit when the circuit isn't powered. I'm guessing a higher valued resistor on the input would solve this problem. (2.2k, 5k, etc.)
2) There is a distinct hum in the output. I'm thinking of a passive low pass filter for this.
3) I noticed that when turning the volume on the keyboard amp w/ this circuit connected, I noticed there is a sudden jump in volume. And it then slowly progresses as the volume is turned up. This is not the case when the circuit is not connected.
Datasheet on the op amp:
http://amiga.serveftp.net/Datasheets/LF347-QuadOp-amp.pdf
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