Recent content by Ad H

I fixed it with the same power chassis plug, isolated with a small piece of epoxy and 4 M2 bolds/nuts and minus on the center pin.

I think you are right. I am going to change this with an isolated power jack.

and it is working, no short circuit. I know that most pedal power supplies have the minus in the middle.

I modified the polarity of the power supply..

I used a non isolated power jack and 9 volts DC in the center pin. So the minus is connected to the chassis. The battery minus is interrupted when I plug in the external power plug. I prefer using the battery...

Thank you all for the comments and especially the wiring diagram posted on this site; it was very helpful to me. As you can see, I used a very old and rusty germanium transistor AC 127 from the 1960s. Some resistor values are difficult to obtain here in the Netherlands, so I replaced them with...