Author Topic: Autobahn aka MP Snow White autowah (Troubleshooting)  (Read 453 times)

brainbender

  • Diode Destroyer
  • *
  • Posts: 41
    • View Profile
Autobahn aka MP Snow White autowah (Troubleshooting)
« on: August 11, 2018, 03:51:43 PM »
Hi!

I'm having trouble with Autobahn. When I put a 78L05 in it's place, pedal sounds thin and have a pronounced envelope and high quack. Without it it seems to work ok (but just OK :D), but it has a high volume boost and it seems it triggers somewhat strange. I checked the tripple checked the values of components, checked for bad solder joints and shorts with USB microscope and everything is good. Also, i swapped more then 10 78L05's and replaced the IC's with other, but nothing is changing.

Any sugestions? Thanks! :)

jimilee

  • Electron Doctor
  • *****
  • Posts: 7254
  • Jimi Lee
    • View Profile
Autobahn aka MP Snow White autowah (Troubleshooting)
« Reply #1 on: August 11, 2018, 04:15:04 PM »
Clear, up close pictures both sides of the board and off board wiring. Also, do you remember the jumpers?


Sent from my iPhone using Tapatalk
Pedal building is like the opposite of sex.  All the fun stuff happens before you get in the box.

brainbender

  • Diode Destroyer
  • *
  • Posts: 41
    • View Profile
Re: Autobahn aka MP Snow White autowah (Troubleshooting)
« Reply #2 on: August 11, 2018, 04:29:16 PM »
My phone camera broke, so I can't post any photos. Everything with pcb is good, just as components. Weird... I can post some audio tomorrow. Offboard wiring is as always, Brian's method.

Btw. it sounds more like EHX Bassballs if that helps. :)
« Last Edit: August 11, 2018, 04:33:50 PM by brainbender »