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, April 6, 2015

Analogman Sunface

The Sunface is a clone of the Dallas Arbiter Fuzz Face, with a few tweaks. First, it has a 50k trimmer at the input of the circuit so you can adjust the pregain (it works exactly like the volume pot on your guitar), second it has an external control for biasing Q2 (the Sundial). Original units use a B5k pot here, which in series with the 2.2k resistor doesn't even equal the original Fuzz Face bias resistor of 8.2k. So you might want to up that pot to a B10k.

Analogman has made both a positive ground, germanium version, and a negative ground silicon version. The germanium versions have NKT275 transistors, and the silicon version uses the BC108. The layout reflects both versions with the perf side showing positive ground, and the PCB side showing negative ground.


24 comments:

  1. nice pedal,thanks for the layout ,used the pcb ,pnp

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  2. Hello, I have a problem, when I put the pot of fuzz all up, I rf freq in my amp.e hear a loud whistle

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  3. Hey! I've made a Sunface BC109, Its almost the same as this one, a little more gain. But the fuzz knob only works at almost the end of the potentiometer, you think changing the Pot for a logarithmic type would solve It? Thanks!

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    Replies
    1. That's a fairly common problem with Fuzz Face type circuits.Try using a reverse log 1k pot or linear 2k pot if you can't get the rev log. Switching to an audio taper there will only make the problem worse.

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    2. Ok , Thank you for that. I gonna do some tests and give you a feedback!

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    3. 5k linear is a too high value? You think It can mess up with the rest of the ciruit?

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    4. It might be too high... A rev log 1k is probably your best bet.

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    5. I took the change. Pedal remains with the problem, but for a surprise tone was improved, dont know why. Ok, thanks for the help, gonna find out some reverse log pots, I took a look at pots type graphics and got why you sad that!

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  4. Hi!
    I've made it using a mixture of soviet GT403G and GT308A, it sounds very interesting, but certainly lacks gain compared to nkt275 which i unfortunately don't have :(

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  5. Hey! What is the component marked with 4001?

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    Replies
    1. Polarity protection diode, 1N4001.

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    2. Are you sure the values of the resistors are the correct ones? I have an nkt275 and two of the four transistors have different values than on your schematics. Also I don't see a diode and the 47uf capacitor, maybe they are on the back of the pcb of the sunface.

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    3. I just looked at a bunch of sunfaces and all have different transistor values, confusing yes

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    4. Oh and btw what are the voltage values on the capacitors?

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  6. Resistor values may vary based on what kind of transistors Mike's used. This is essentially a Fuzz Face which often times needs some tweaking to get sounding right. The layout is verified and the values match that of the other layouts for this circuit I've seen. Voltages for caps can be whatever you have on hand. I typically use 100v for the film caps and 35 or 50v for the electros.

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  7. Hey, man. The layouts are confused. The pollarity of diode and the 47 caps are different. Can you help me? Thanks.

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    Replies
    1. If you read the second paragraph of the post, the left side shows positive ground and the right side show negative ground. If you're building with NPN transistors, follow the orientation of the right side. If using PNP transistors, follow the left.

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    2. Works fine and sound amazing! Thanks, bro!

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  8. hey man thanks for the layouts, what should i change in the layaout if im using a bc109 transistor? pleas help!!!!

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    1. You shouldn't have to change much. Socket the transistors for sure, and socket the 33k resistor as well. See where the stock values get you and adjust if need be from there.

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  9. Hi! Is it possible to change this trimmer to a external pot, like the Bias control? Thanks! Rafael

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    Replies
    1. Of course. The input goes to lug 3 and lugs 1 and 2 are jumpered and go to the 1µ input cap.

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  10. I've tried with bc109, 2n2222, bc548.
    Sounds great...more compressed than the NPN Fuzz Face.

    Thanks!

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