Madbean Naughty Fish

[yuka42]

Good Afternoon!

Yet another troubleshooting question.....

Finished a Naughty Fish (Mutron III) build by MadBean.  The pedal sounds amazing, fantastic, and more than I hoped it would be.  Beautiful and fun pedal build.  Great job MadBean.  One problem though....

The HP/LP/BP switch works great in the far right position...(BandPass i believe), but when in the middle and left I get silence.  Possible switch issue?  I tried to be extra careful not to overheat the install of the switch but ya never know.  Or is there another obvious spot in the circuit that pokes out for those more knowledgable in the design?  The other two switches work as they should and sound great.  I will be poking around this weekend with an audio probe to try and diagnose, but I thought I'd put the question out there.  Here's the link to the build doc with schematic...

http://www.madbeanpedals.com/projects/NaughtyFish/NaughtyFish2015.pdf

Ryan.

 

[fazer]

Is it the correct type of switch?  There is on-off-on and on- on- on .  I have not looked at the link .  I just no I have grabbed one when I've needed th other before.

 

[PRR]

That's a very odd ON/ON/ON switch. Did you get it from Bean? Or somewhere else?

 

[yuka42]

ooo, good suggestions guys.  Will double check the switch type.  It would've been purchased from Tayda most likely.

 

[orangechili]

Those 3 positions ON/ON/ON switches can be different in their termination as well in my experience. If you verify it's the correct type of switch that is likely the issue. I had the same problem when I built a mutron III  on veroboard in the past. That's why some positions work and other don't.

 

[yuka42]

Hi.  In case you all were waiting patiently for an update....

The switch was correct and was operational.  After some poking around to test continuity, I discovered that there was no connection between the switch and pin 7 on IC3.  Not sure why.  Mightve busted a trace or something on the switch install.  Fixed it with a jumper and it works great.  The circuit board wiring diagram included in the docs helped a ton.  Thanks MadBean for the details!  I'll do further testing but I'm pretty sure its good to go.  Thanks for the help everyone.  In the process I learned how an ON-ON-ON switch works...so...bonus!!  Education by failure.  haha!

Ryan.