This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Monday, August 28, 2017

Friedman BE-OD

By popular demand, here's the BE-OD from Friedman, one of the best Plexi in a box pedals around. Well, not Plexi really. It's designed to emulate the Friedman Brown Eye tube amp head. Laid this one out for board mounted pots, and it will fit easily in a 1590BB. More info can be found on the FSB thread for this one.


44 comments:

  1. Hi, first i want to say that i love your layouts, they are great.

    any chance you could do this layout with a tl074?

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    1. Probably not. Not single layer and with board mounted pots anyway. There's a vero layout that uses the TL074 tho.

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  2. How's the off board wiring work with the status LED powered from the board?

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  3. This man, he is not fried, he's on fire

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  4. Wow! I was waiting for this pedal for a long time. Only one question. It's imposible to make a little tiny to fit in a 152B? However I appreciate your work. Thanks!

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    1. It'll require at least 2-layered board with a ton of vias.

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  5. Hello, the trimmer is trim-gain in the original pedal??

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    1. Yes, it controls the gain in the 3rd opamp

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  6. As soon as I get my bigger perf boards im on this one.... should be any day now. Great work on the layout man!!! Looks like it was a tough one.

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  7. I build the stripboard version over the weekend and is working fine, the only thing is i feel does not have enough headroom, i have to put the VOL over the 3/4 position to have the same vol than my bypass tone. I read on the FSB thread that has to be with the 4 clipping diodes, i used 4148 instead of the BAVs, so i will check if there is a way to increase current over it. Anyway this has nothing to do with the layout so i you can marked as verified.

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    1. By stripboard you mean perf, right?

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    2. yes that's correct, the perf board.

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  8. I finished mine over the weekend but the volume was very low, after checking everything I discovered two bridges, "I'm getting worried, I start losing qualities"
    The circuit works perfect, all pots respond well, as it had no anti-log potentiometers, applied linear, the leds also did not have 3mm, and soldered leds of 5mm, all without problems.
    The pedal produces some self oscillation, which can be attenuated reducing the gain through the internal trimmer, the last comments of the FSB thread, doubts if the mica capacitor will be 120pf or 1,2nF, because increasing the value reduces the noise and self oscillation, I have not tested yet but I will try as soon as I have a free time "tomorrow." I am waiting for the BAV99, but everyone who has already tested these diodes say they do not notice the difference between 1N4148, maybe I will not even bother to change them.

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    1. Hi! have the same problem. Excellent sound but only half the volume of my clean sound. Can you specify where you found the bridges? thanks!

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    2. Next to the logo and the name of the circuit, there is a thin line of earth between two tracks, it had a soldering point slightly touching, the other bridge was coarser, two points even joined, because I usually exajer in the amount of solder. I always print the inverted and enlarged circuit on a sheet of plain paper just to check, and it's a big help.
      Because of this situation, which caused me to lose a lot of time, because I could not find the problem, I proceeded to do the following if I did not have time to edit the circuit and erase all those lines of land that could give problems, after "decalcar" the layout on the copper plate, with an x-act and carefully, under a lamp with magnifying glass, scratch it.

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    3. Thank you! I had a bridge exact on the same position as you. But did not find anything else wrong until now. The pedal is still not as loud as the bypassed signal. I have to continue my search.
      It is hard to search for the error because always i take the guitar to check i spend half an hour in noodeling around :-) such a great Sound!

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  9. Can I replace the C10K and C100K with linear or log potentiometers? Wich values?

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    1. You can try linear tapers for those

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    2. I used the linear for the presence, it's okay! Unwritten rule is - LIN pots instead of REV LOG will do, not as "smooth" travel, but still usable... And having the lin pot for presence here I wonder if the rev log is actually mandatory, can't find anything wrong with the lin pot's sweep, guess some circuits are more picky than the others...

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    3. Of course, same value as rev log, just linear taper.

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  10. I applied sockets in the diodes, and in the capacitor of 120pf, the diodes tried several and some combinations, the differences in the sound are not many, nor are they better, so I continue with the 4148, the condenser makes a lot of difference, I started by changing it by one of 560pf, and soon notice an attenuation of the background hiss, I increased to one of 1nf, and the pedal almost became silent, I played guitar alternating the values and I did not notice any cut of frequencies or change in the sound, unless removal of noise; I wanted to test with a 1.2nf, but since I only had 1.8nf, that's what I applied,and the noise disappeared, I think it's going to stay that way.
    There are still some problems to solve, the self oscillation is a bit exaggerated, the FSB thread reporter commented that applying an input buffer solved the problem, I got the Cornish Buffer, it improved a bit but not enough.
    (My texts are translated in google, because my English is very bad)

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  12. One question! should there be DC voltage 4,5v at the two LEDs on the right side? One of them is always on and i can not find the source. i am almost freaking out!

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  13. i just finished building this one today and found a major error in the layout causing very low output and all of the clipping LEDS not working correctly. it's the two LEDs (D7 & D8 that connect to pin 3 of the treble pot. their other side the are NOT supposed to connect to ground. they go to +VB (the orange trace). after fixing that, it works perfect and it sounds great.

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    1. Thanks for catching that John! Fixed now.

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  14. Anybody Tried this using 4148 ? Is that working properly ?

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  15. Is there a "Layout wishlist"? I would also like to make and compare this pedal with the Diezel VH4. Schem can be found here:
    http://www.freestompboxes.org/download/file.php?id=28802&mode=view

    Thanks!!!

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  16. Hi, I just built this one yesterday - it works fine except that I get a lot of AM station frequencies and it's as loud as the guitar signal. How do I get rid of that annoying AM niose?

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  17. is there a orientation for d1 2 and d7 8 which way does the cathode and anode face ?

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    1. With LEDs, the flat side indicates the cathode. So here, the cathode of D1 and D7 are on the right, and the cathode of D2 and D8 are on the left.

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  18. Built this last night. Sounds great, no issues! Thanks for sharing your work and making these amazing layouts available to everyone!

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  19. Hi, May I know where to get the transfer image, please? Thank you!

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  20. Try to break the ground loop on the pcb to reduce noise...

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  21. build it today. got some serious oscilation problem. changed the pf caps to higher values , oscilation did decreased but not stopped. because my own stupidity I have managed to change the power source to a more reliable one (strymon blue sky wall supply). And the oscilation stopped... I will change the original pF values back now. The layout is working as it should and I thank to author for sacrificing his time to make this available. Everything is working as it should without any problems and I tried the circuit at 18V.. The sound was better louder and tighter.

    Ps: for high gain circuits always use a reliable and silent, quality power supply. I had learned the hard way :)

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  22. Although I had trouble, I read the 10 Ohm as a 10K my fault, I have to say this was a fantastic circuit. I changed values on a few things because I know the tone I like and the red LED's carry a higher frequency so I went down to d1 and d2 green and yellow so I got a little lower frequency on the 2nd stage gain. Then went with the switching diodes you had suggested since I didn't have any of the BAV99 and then I went red and yellow on the presence/hard clipping/treble and then finally I went with bass and volume control of the two 220n caps down to 120n (those were done because it was all I had really.).

    After everything it was still a great sounding circuit. I know it isn't exact to the actual pedal but I built it with the idea if for some ungodly reason I needed more crunch I could simply let my amps gain channel do that. I have noticed no AM frequency and no adverse effects. I did not get any oscillation and all is well and for my build to be a modified BE-OD it is what I was looking for.

    Thanks for your hard work and the ease of use of your site to get the transfers. Oh and the power diode I used was a 1n4001 since a lot of pedals out there use those on the power supply part of the circuit and it works just fine so I can confirm that the 1N4001 works in this circuit.

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