Hey Anders,thank you for this Layout. I have built it and it works, but i think it sounds not right. I have checked the schematics at fsb and there are two diodes missing. One 1N5817 (1N4004 in the schematic) and one 1N4148 (pin 9 and 10 at the Tl074P). And the one 1,5k resistor at c18 i18 should be a 4,7k. I have made the changes but I thinkt taht it still sounds not right. Sven
Hey! Thanks for the heads up! Changed 1,5k resistor to 4,7k and added the missing 1N4148 diode. I prefer in series protecion diodes insted of diodes across V+ and Ground . Thats why I omitted 1N4004 diodes but they could easily be added to the existing layout just in case 1N5817 diode fails.What is it about it that doesn't sound right. Noise, gating, hum?
It sounds a bit gating or like misbiased fuzz. With the gainpot turned down it is totaly silent but in the yt videos there is in this position a little distortion.
I'll take closer look at the schematic to see if there is any errors in the layout.
Hey, I think I have found the mistake. The 47,5k restistor x4 /Q4 is connected to pin 3, but should be connected to pin2 X4/P4.Now it sound way better and there is distortion even when the gainpot ist turned down.
Thanks! Such a small mistake and easy fix. So would you consider the layout verified by now?
Yes! I think now it sounds as it should.
Cheers, I'll tag it.
Maybe i was a bit to quick to call it verified. It still sounds a bit gated. I compared the layout with the schematic and your layout has ten 100nf caps, while the schematic has only nine. I think the cap at yz14 shouldn't be there. But it doesn't change the sound. And i count 43 cuts. Maybe you should take a look also.
I'll take a second look. That 100nF cap was an addition that I usually use in high gain circuits. It runs parallel with 22uf cap which is connected between the main Vref route and ground. It don't affect the tone apart from possible noise.Hmmm, gated you say, evn with the gate switch left open?
I think it has way to much gain or volume. It is very fast at unity. With the gate off and the gain turned down it sounds good and has plenty of distortion, even in this position. When i turn the gain clockwise it starts to sound gated, especially when i play palm muting ore single notes. With the gate on the gain pot has to be set over 12 oclock to sound good. it sounds gated with the gain turned down. thank you for helping me.
Mine is working now, I have changed the zener diodes.
hi, i have a problem with this effect. is it verified? i think the number of links is false.
as if count it right on the schematic there are actually 17 links + 2 links from FX loops, but in the description it says there are 18 links. Maybe one link is hidden under an element
I'll take a closer look at this one tomorrow.
ok thank you. I have already prepared the board, but now I have to wait until it will be clear what to do with the missing line
Just checked the layout and it is 17 links if using an effect loop, 19 links if you're not using it.
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Hi went through this, moved some components around according to the schematic nothing seems to be inconsistant with your layout It sounds huge and all the controls seem to function i ahven't noticed any gating( i havent had enough time to test it since i've finished it just befor going to work )i will fully test it tomorrow Thank you fuzzhead for the layout.
That is great! Glad you got it working. This one is pretty high on my list.
you can call it verified, this thing is awsome and the gate is very useful and responsive. it doesn't affect much my sustain ( i will replace that trimpot with a pot so i could control the amount of gain without opening the enclosure )Keep up the good work.
I’m struggling to get this one working. I’m just getting static hiss. All the pots and switches seem to work as it changes the sound of the hiss as you would expect it to normally. I’ve swapped out all my ICs and checked all my components and soldering. Does anyone know where abouts I should be looking here?
Try soldered the ground to the metal cover of the pots.maybe it will help
Built this last april '21 out of effects layout which has the same layout with dirtbox layout.i call this verified with flying colors! Tnx.