Fok Fuzz 3,5%

[newbie builder]

Hey, I was hoping somebody could help me figure out a parts list by looking at this schematic:

I have the list for the regular Folk Fuzz, but not the "De Luxe" version. Here are some soundclips of what the finished thing sounds like: http://www.custom-sounds.se/static/en/43/
It's a design by Bjorn Juhl of BJF electronics in Sweden, and I'd like to make it if I can, but I'm fairly new to building stuff. I might just build the regular Folk Fuzz (the schematic is in that link, as well as the parts list) because it would be easier no doubt and I don't need anything too fancy. Is the 3,5% version much harder? Or just a few more components. Thanks

[warioblast]

Hi,
I'm going to build the Folk Fuzz 3.5% too  . I have all parts but I've been busy with other projects (lately the axis fuzz).

I asked help on HCFX forum, and Swedish forumite Andreas gladly translate the schematic.

From top left, "line by line"

"Folk Fuzz 3.5%" - this is probably only funny (and then just barely) for swedes, as it alludes to the medium strength beer we can buy in grocery shops and supermarkets (the stronger stuff is only sold in special government-controlled stores). So "Folk beer" is what the teens get drunk on...

"Till lysdiod" - to LED (anode)

"Fotomkopplare visas i förbikopplingsläge" - footswitch shown in bypass mode. The "3P2V" is a regular 3PDT, btw.

"Volym" and "Diskant" means "volume" and "treble", respectively.

"minuspol batteri" - battery negative

The parts list reads:
T1, T2 = 2M2219A for Silicon, 2N1306 for Germanium. Hfe needs to be larger than 60.
T3 = 2N2219A or similar
T4 = 2N2905 or similar
R1 - R11 = 0.6w metal film
R12 and R13 = 1/4w (0.25w) carbon film
C1 and C7 polyester (film)
C2 = silver mica or ceramic
C3, C4, C5, C6 = Long life electrolyte caps
P1, P2, P3 = Alps RK09
LED in your choice of colour
"2.1mm marushin" is the dc plug.

added notes from the man himself:
Rightwell the Folk Fuzz was made as an article in swedish FUZZmagazine, since
then a follow up: Folk Fuzz De Luxe also made an article.
I have attached the schematic used for that in a Word file, in case you'd like
to build that.
You may have to give the file the suffix .doc and download to disk to be able
to open it if you run PC.
The total De Luxe article may be translated later this year

The real magic lies in the semiconductors, it's just that the Folk Fuzz circuit
can accept so many different types of transistors.
In particurlar the T2 will have the most impact on sound of the circuit.
Note that germanium types can also be used here, if you can find any good ones.

Try to find trannies with approximate gain of 100.

WIMA makes good caps for the range used in the circuit.
The small cap, is used to limit the bandwidth  of T2 and is one that is best
tuned to perfection as the real value it gives in the circuit is the gain of T2
multiplied with the value.

The circuit was aimed at giving good results with parts that would be easy to
find and inexpensive.
If you'd like to make something more outof it check out the De Luxe version"

There's also a thread on TGP forum where Bjorn chimes in.
If you have more questions don't hesitate to drop a mail to Bjorn, is a very friendly and helpfull  guy.

[newbie builder]

Thanks for the quick response! I have all the mouser part #'s for the regular folk fuzz, but not for the 3,5%. Do you have them for the 3,5% handy? (if not I'll just look them up) I read about the Folk Fuzz over at TGP first since I regular there, and ocasionally music toyz and HCFX too. You'll have to post pics when you build it, I'm curiuos to see how you lay it out and how easy/hard it turns out to be to build.

[warioblast]

I got every parts easily, except for the transistors: I ordered several different types but the less gain I have is 150 hFE.
I'm gonna breadboard it first and see if it needs to be biased, or see if I really need to get 100hFE transistors.

[newbie builder]

WHere did you find the 150hfe?

[Nasse]

That percentage marking after the pedal name really does make a big difference, like "Folk" you think about Bob Dylan and hippies and all nice old songs, or Volkswagen, cheap but cheerful and high quality. 3,5% beer can be thought as something that makes people´s head "fuzzy". I have mostly empty bottles of beer in my house, so I avoid buying new, they will be empty soon anyway.

If you can find a cheap multimeter with transistor hfe measurement function, it will take you there, you can easily find suitable silicon transistors for this and, say, fuzzface type circuits. Do not try measure germanium transistors with these.

Sometimes you can find nice sounding transistors by using medium power TO-220 cased transistors, these have quite low hfe. But there are smaller and cheaper alternatives silicon trannies. It is best to buy ten or five (if you are lucky) and measure if you find suitable ones. Do a search for silicon fuzz face or "YAFF" at AMZ

[newbie builder]

I'm gonna bump this thread hoping somebody has built a folk fuzz/folk fuzz 3,5% and has a layout for one.
Thanks--

[rhys]

I just finished this circuit and really like it.  I tried to make a layout with Bancika's software but I made a total wreck out of the layout and it didn't work.  After someone here pointed out a number of mistakes in my layout I depopulated the screwy board and put it together on perf and it works wonderfully.  If noone else has a layout maybe I'll take another crack at it.

[markm]

I too would be very interested in a layout for this one.
The sound samples are KILLER!

[newbie builder]

Yeah- Bjorn Juhl is a genious. His other pedals sell for about $285 a piece- including this one if you buy it from him- but this is the only one he has published a schematic for. He goops all the rest of his pedals. If nobody has a layout, I'll try one too but it'd be hand drawn so hopefully if I upload it people can read it. I've learned a LOT more than when I first posted this thread, so I could probably do it, but it's always nice if somebody else has a layout because I haven't drawn one for a pedal this complex (yes..that noob )
Thanks--

[markm]

I may push the envelope a bit and take a shot at this layout....
First I'm trying the Eagle program then perhaps banicka's.
stay tuned.........

[markm]

Looks to me like (3) 3904 trannies could be used and (1) 3906.
I am correct on this??

[newbie builder]

You most likely are, though I'm not sure. I know that BJ said in his article that about 10,000 kinds of transistors can work in the circuit....I do know though that Mouser has the all but the germanium one. Hope you can figure out the layout! My PC crashed and that's what had the layout making software on it so I don't particularly want to draw today......

[petemoore]

  I'm thinkin' of takin' a crack at building this one.
  I'd use sockets for the Transistors. Actually Q's 3 and 4 are used as diodes and could be diodes.

[markm]

Here it is.
I used Banicka's software which is excellent BTW.
Please keep in mind this is my most complicated layout so far and, Only about half of the layouts I have done have worked 
If someone could check this I'd be very greatful as well as some other folks on this board!!!



Be gentle guys!!!
PLEASE! 

[newbie builder]

That looks nice! I haven't checked it yet but I will now to make sure everything looks right- at a glance it does though. Thanks!

[markm]

After looking at this for awhile, I resized it a little.
This looks alittle bit better I think.



Please, any of the big guns, let me have your feedback on this, I'm just learning this part of the game 

[newbie builder]

I'm not sure if this matters, but you have R4 (100k resistor) going straight to ground. On the schem, it goes to a 10uf which is connected to a 100ohm and ground as well as a 10k which goes to ground and the emitter of T2. I'm not much at layouts, so for all I know since it gets to ground it's fine, but I thought I'd say it just in case. Q4's emitter should go to ground, not through C6. The base should be the thing that goes through C6. C6 should go to the collector of Q2 as well as to C3+R10. That's all that I saw that seemed a little off, but for all I know I'm wrong and you had that completely correct! Thanks a lot for drawing up the layout- it looks great and is MUCH more complicated than anything I think I could've pulled off...the only thing I've done a perf layout for so far is the AMZ mini booster which is a good bit less complicated than this.
Thanks!

[markm]

You're right.....
Try this one!



In trying to make it smaller I moved a couple of things around and I guess I lost my place as to where I was at within the schem.
Let me know if you see anything else.
   MarkM

[markm]

Yet ANOTHER revision.............