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https://youtu.be/HAA0_tKjkZM

Replaced R19 and I've got sound now. It's not very loud or fuzzy. I checked that the resistors in the output buffer that lead to 9v are getting it R20 and R21) and R19 and 22 are getting a good connection to ground. It looks like this stage is supposed to get the volume back but that doesn't seem to be the case. I did check that all resistors that should be getting 9v are. I guess I'll check the grounds next? Does that seem logical?

Edit: posted a video below. All knobs dimed.

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Q4 is in there the right way. Replaced r22 last night. Transistor is socketed so I tried others and that's a no go. I'll try reflowing those pins, replace r21 and report back.


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I've been working on a big muff from diyguitarpedals.com.au and am not getting any sound. I've audio probed it and am getting sound to C12 to the base of Q4 but not c13. I've replaced c13 and have the same issue. I've reflowed solder as well around that whole section to no avail.
I don't get sound to any other pin than the base of Q4. Should I be getting sound to either of those pins?



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Hey guys/gals,

Been pondering this all afternoon. Went home for a quick lunch. Decided I hadn't tried my QoB since I got my test box working and found that it works.
Sort of.

Only works with both foot switches engaged.
Any thoughts off the top of anyone's head why that would be? I didn't get a chance to do much in the way of troubleshooting. But thought if someone had a quick thought of where to start on that one it would be appreciated.




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No but I can fill your blinker fluid. I'll even add the coupon code for 2% off


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Unfortunately mine is like #30 down the list so it might be a while until I get to it lol


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I ordered one of these. Takes care of some of the more difficult parts like smd soldering and eeprom programming for you.


https://mas-effects.square.site/product/mimirs-well-kit/6?cs=true


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I'd like to sub a TL072 for a 4558. Don't have any 4558 on hand. The pinouts look compatible. One question I do have is that in the build docs it shows what Voltage I should expect at each pin for the 4558. Would the voltage be similar for the TL072? Or completely different?


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I can help with GitHub. I'm a software engineer by day.


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Took 9 months off and forgot how to use a multimeter. Thanks for answering my silly question.


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Can anyone help shed some light on this?
I've not been able to get a 9v readout on anything.

What I have tried:
Multimeter setting


Four different sets of leads
1 set with a brand new multimeter I ordered just in case mine was bad. (Same readings for both)

Measuring at the DC Jack:
Get around 4v at the pins.
Different jacks. Some tayda and some lumburg that I just ordered from lovemyswitches.com

A bunch of different power supplies.


Is there something I'm missing?
I get nearly nothing to any board that I have wired up including one I verified working prior to all this madness.



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That's the one. Weird. I found a debugging page but the home url was different


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Anyone know what urls are available for this? I'd like to as a personal project rebuild it in a Vue application. I probably won't host it. And if I did it would be with permission. But mostly just to get back into Vue applications (I program in react for anyone who knows what I'm talking about :-) )



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No problem my guy. I ordered one too. Haven't put it together yet. But looks fun.


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