Hallo!
Sorry if I'm writing in English but I can't speak German.
I have built 10 musikding stompboxes and so far 4 of them are not working properly, so after some basic troubleshooting I'm looking for help here on the forum. I want to ask you about the Phaser.
Mine works ok in bypass but when I turn it on I get no sound at all. All the wiring seems ok and also the pcb is identical to the one on the pdf instructions. Are there any errors in the Version1 documentation?
In a next post I'm also going to post some photos. Meanwhile I measured bias point voltages on the 3 ICs and on the transistors as indicated in one pdf. Here are my measurements.
IC1 4,5 4,5 4,4 0 4,3<-->5,4 4,8<-->5,2 4<-->6 9,1
IC2 4,5 4,5 4,5 0 4,2 4,2 1,8 9,1 Pins measured from 1 to 8
IC3 7,4 4,5 4,5 0 4,5 4,5 1,7 9,1
Q1-Q4 2,6 4,5 4,5
Q5 4,5 3,9 4,4 measuring the 3 pins from left to right with the straight part below and the curled part above in a top view of the pcb
My measurements are a bit different from the ones on the pdf...
What should I check to try to make it work? Photos are coming soon. Please help..
Thank you!