What did I do wrong?

Officer Bukowski · Post by **Officer Bukowski** » Sun Oct 09, 2011 4:04 am

I've only tried it with my tele. My SG is out of comish right now haha

I know it's really weird. It sounds normal unless I do the whole volume thing. Then it sounds completely broken. It's actually pretty sweet. But I kinda want it to work normally.

Officer Bukowski · Post by **Officer Bukowski** » Sun Oct 09, 2011 5:37 pm

I just completely rewired this pedal with a different wiring style and it's still making the tremolo sound. Did I fry one of the components or something? I really don't think I did but it's definately possible.

I can email a clip of the tremolo sound if it would help solve the problem.

Jero · Post by **Jero** » Sun Oct 09, 2011 7:36 pm

What wiring style did you use this time?

Officer Bukowski · Post by **Officer Bukowski** » Sun Oct 09, 2011 10:40 pm

I copied the wiring diagram for the mudbunny pcb from madbean but changed it a bit for no battery and the LED lug + CLR on the board. The wiring looks a lot neater. I'm not sure if there's a difference but I'll probably wire 3PDTs this way now.

Fuzzrociouspedals · Post by **Fuzzrociouspedals** » Mon Oct 10, 2011 10:31 am

Just for fun, take a look at GGG's 3pdt wiring. I've stuck by this for foreeeeeeveeeeeer!

willc · Post by **willc** » Mon Oct 10, 2011 12:24 pm

Yeah, The GGG wiring diagram is a great reference tool if building pedals. The one on the Beavis Audio site is good too and both sites have lots of great info if you are wanting to build those little noise boxes.

Officer Bukowski · Post by **Officer Bukowski** » Mon Oct 10, 2011 7:59 pm

Thanks I'll use the GGG wiring diagram next time.

So if I connect the output jack's tip to it's sleeve the weird tremolo sound seems to go away. Would it affect anything else if I connected the two with a wire?

candletears7 · Post by **candletears7** » Mon Oct 10, 2011 8:09 pm

if you connect the out jack's tip to it's sleeve you will short the signal to ground and get overwhelming silence.

Officer Bukowski · Post by **Officer Bukowski** » Mon Oct 10, 2011 8:32 pm

Yeah I just tried that and figured that out myself haha

but it solves the problem when I connect them with my finger. This is driving me crazy I can't figure out what's wrong.

Jero · Post by **Jero** » Tue Oct 11, 2011 1:23 am

Do you still have the middle lug of your dc jack going to ground?

Officer Bukowski · Post by **Officer Bukowski** » Tue Oct 11, 2011 1:40 am

No I fixed the dc jack.

Schlatte · Post by **Schlatte** » Tue Oct 11, 2011 2:51 pm

Officer Bukowski wrote:Yeah I just tried that and figured that out myself haha

but it solves the problem when I connect them with my finger. This is driving me crazy I can't figure out what's wrong.

hmmm sounds like some sort of grounding issue to me... :idk:

And always remember:

McSpunckle · Post by **McSpunckle** » Wed Oct 12, 2011 5:05 am

It sounds like the circuits just gets unstable with the transistor biased right to ground. Which isn't normal for SHO, last I checked (the And Aardvarks! is a lot like an SHO and it's always biased straight to ground).

Hmm... double check that the biasing resistors are connected properly and that the protection diodes are facing the right direction.

Also, if you're using the enclosure to carry ground, make sure the jacks are on really tight.

Maybe add a filter cap? I've never noticed them helping anything, but maybe!

eatyourguitar · Post by **eatyourguitar** » Wed Oct 12, 2011 8:31 am

here is an example of how useless protection diodes are. everyone has 9v tip negative power supply. this is not the wild wild west of DIY like in the craig anderton book. but if you install that diode backwards you have protection from turning on lol.

McSpunckle · Post by **McSpunckle** » Wed Oct 12, 2011 8:53 am

I was talking about the two diodes protecting the MOSFET, actually. If they were backwards, it would affect the bias, since the 4V(ish) bias voltage would go through the diode, making it more like a .6V bias voltage... and I think the power would be able to get right to the gate of the MOSFET...

... on second thought, I don't think the pedal would work if that was the case.

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