eh là bas ma
Well-known member
Hello,
I built this project with a musikding's kit. Never even heard of the original circuit before, i just wanted to try it, out of curiosity. It certainly has its own singular sound, but i'm not sure if my build is all right.
Everything seems to be working, the sound is close to the few demo i could find on utube, but i couldn't find a good quality sound sample as comparison.
I can explain the weird resistors at RB1 : musikding forgot to send this 6M2 resistor, i had to build my own.
I noticed some whistling noises that can appear with the Volume, Treble, and Bass controls. It's easy to get rid of them by turning the knobs a bit, but i wonder if this is supposed to happen ?
I also noticed a narrow spot in the gain control's rotation, around 1/4 of rotation, where the signal cleans up significantly. It's a bit strange : If i turn Gain fully CCW the sound gets more distorted. From 1/4 of rotation if i turn CW it gets also more distorted, more than fully CCW too : On my build the cleaner setting is a narrow spot at 1/4 rotation of the gain control. Could it come from my home-made biasing resistor ?
Here is a sound sample to give you a better idea of what's happening :
In this sample, Bass and Treble are set at the middle of their rotation. I just turn the gain knob. At the end i turn all controls to get some whistling noises. 3PDT is a bit noisy too, just a bit.
What do you think ? Should i start troubleshooting ? Do you think the effect sounds as expected, besides these few subtle issues ?
Every suggestions and observations are welcome ! And happy new year !
I built this project with a musikding's kit. Never even heard of the original circuit before, i just wanted to try it, out of curiosity. It certainly has its own singular sound, but i'm not sure if my build is all right.
Everything seems to be working, the sound is close to the few demo i could find on utube, but i couldn't find a good quality sound sample as comparison.

I can explain the weird resistors at RB1 : musikding forgot to send this 6M2 resistor, i had to build my own.
I noticed some whistling noises that can appear with the Volume, Treble, and Bass controls. It's easy to get rid of them by turning the knobs a bit, but i wonder if this is supposed to happen ?
I also noticed a narrow spot in the gain control's rotation, around 1/4 of rotation, where the signal cleans up significantly. It's a bit strange : If i turn Gain fully CCW the sound gets more distorted. From 1/4 of rotation if i turn CW it gets also more distorted, more than fully CCW too : On my build the cleaner setting is a narrow spot at 1/4 rotation of the gain control. Could it come from my home-made biasing resistor ?
Here is a sound sample to give you a better idea of what's happening :
In this sample, Bass and Treble are set at the middle of their rotation. I just turn the gain knob. At the end i turn all controls to get some whistling noises. 3PDT is a bit noisy too, just a bit.
What do you think ? Should i start troubleshooting ? Do you think the effect sounds as expected, besides these few subtle issues ?
Every suggestions and observations are welcome ! And happy new year !
Last edited: