Mutant Bass Drum not working at all

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Sone_brian
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Mutant Bass Drum not working at all

Post by Sone_brian » Sat May 09, 2015 2:54 pm

I just finished building my Mutant Bass Drum, plug it in and nothing happens. Tried a different power cable and still no go.. I rechecked all my resistors and verified everything is in correct. I also went back over all my solder joints.

I can't seem to find any info on test points where I can check for appropriate voltages when plugged in. Maybe the voltage regulator is bad?

Ive built several other diy modules as well as the 2 other Mutants with no issues. Any advice would be great, Im a bit stumped.

Thanks!

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sromanel
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Post by sromanel » Wed Jun 10, 2015 4:52 pm

Dude, did you solve it? I'm having the same issue, with the exception that dist side works fine

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blitit
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Post by blitit » Tue Sep 01, 2015 10:52 pm

same here
NEW EURORACK EP at blit.bandcamp.com

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frankaponte
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Post by frankaponte » Wed Sep 02, 2015 4:59 pm

What version PCBs? Didn't have any trouble with mine.

Sone_brian
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Post by Sone_brian » Tue Sep 15, 2015 10:54 pm

Hey sorry guys, I didn't get back for months on this one. Life got crazy busy and I haven't touched it since I made the post. I about to pick it back up mess around. Did either of you guys get yours up and working?

Sone_brian
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Post by Sone_brian » Tue Sep 15, 2015 10:56 pm

also boards are v1.05
so newest ones.

Ruben
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Post by Ruben » Thu Jan 28, 2016 10:38 am

Same here, only dist side is working.
Any luck?

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dropthedyle
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Post by dropthedyle » Sat Apr 02, 2016 12:37 pm

same problem here with 1.05 pcb ...

the distortion side is working.
trigging is not working at all.
when the trimpot screw of the decay is at max, the module oscillate and the green led is blinking.
when shunting the trig jack with one of the leg of the TL072, the trig is working twice (double trig : rising edge and falling edge ?)

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oiseaux
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Possible solution?

Post by oiseaux » Fri May 13, 2016 8:59 am

No electronics expert here, but I had the same problem... until I realized I hadn't set the Accent jumper on the PCB.
The module doesn't work without it...could this be your issue?
Scene, but not herd.

greenmind
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Post by greenmind » Mon Dec 04, 2017 12:10 pm

Just finished building my Mutant Bass Drum last night and I'm having the exact same problem! Distortion side appears to be working fine but I can't seem to get the bass drum to trigger. Accent jumper is attached. Did anyone figure out the issue?

greenmind
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Post by greenmind » Thu Dec 21, 2017 6:04 pm

It turns out I had a bunk voltage regulator. After replacing the 7805, the module is alive and thumping :sb: :sb: :sb:

Hope this info is helpful to others!

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