SOLVED Big Muff not working

almondcity

Well-known member
After 12 successful builds with no issues, the 13th has beaten me. I get bypassed sound, but no sound and no LED when activated. I used sockets for the transistors and trimmers for R7 and R12 I believe. Using the Green Russian values.

The only thing I can think to try would be removing the trimmers or maybe reflowing the DC jack connections, otherwise I have no idea why my LED is at least not working.

Can anyone spot any problems?

Thanks
 

Attachments

  • 20210616_001349-small.jpg
    20210616_001349-small.jpg
    529.3 KB · Views: 23
  • 20210616_001355-small.jpg
    20210616_001355-small.jpg
    433.9 KB · Views: 25
  • 20210616_001359-small.jpg
    20210616_001359-small.jpg
    634.1 KB · Views: 26
  • 20210616_001407-small.jpg
    20210616_001407-small.jpg
    479.3 KB · Views: 24
  • 20210616_003346-small.jpg
    20210616_003346-small.jpg
    799.2 KB · Views: 18
  • 20210616_003400-small.jpg
    20210616_003400-small.jpg
    688.1 KB · Views: 21
No, it's a clue that there is a missing connection. Apply power. Connect the meter black lead to shell (GND) lug on either the IN or OUT jack. Touch the read meter lead to the anode of the 1N5817 and report the reading.
 
Back
Top