Building a FuzzFace - couple of questions

[Xplizit]

Hi, I'm going to build a FuzzFace, and I have a few questions about it.

1) Is  PCB-board correct? (I made it, just want to check and see if it's right before I get it made. It's just a rough sketch.)
http://home.no/xplizit/FuzzFace/fuzzfacepcb.JPG
(Using this schematic: http://www.geofex.com/Article_Folders/fuzzface/fftech1.gif )

2) The AC128 seems very unstabile, or hard to get a good one. Is the AC188 a good replacement option?

3) What capacitators should I use? (Ceramic, polyester, electrolytic...)

4) The output capacitator is 0,01F, but I found a schematic for the FF on another site aswell, it was the same except for the output cap, which was 0,1uF. Which is correct ?

5) How do I make it so I can use it with an adapter ?

6) I want an on/off LED (3PDT switch), where is the LED placed? In the circuit, or between two of the terminals (?) on the switch?

7) I was thinking of putting in a Tone-knob aswell. Would this work fine, or would it mess with fuzz? And should there be a resistor between the tone and vol ?


Heh, sorry for all the questions. Was a little more than I thought It's my first pedal, and I don't want to screw it up  :lol:

Thanks!

[Xplizit]

Anyone.. ?

[MarkB]

check out the boutique fuzz face project on GGG - I think that has a lot of the mods you want to do - he also has a schematic on there for making it negative-ground (for use with a wall-wart)..

The AC188 is a fine substitute - as long as it's the right gain/leakage.. read the article on GEO for how to test trannies for Fuzzes.
"-)

[toneman]

hey X,

i'm workin on a same FFclone schemo.
it's on a breadboard, not wired.

don't know bout the AC128/188.
i'm using a .1mfd--that's point1microfarad 4 output cap.
larger the cap, more low freqs.

i'm using some old GE Ger trannys.
used the Hfe function on my DMM and got 50.
thought i read U needed Hfe of 120 to 150(?)

pumped it with a 1Vpp sinewave;scope says i got signal out,
but i'm varying the output Rs 2 increase output level.
don't know what the output wave should look like.
it's *definitely* fuzzy.
changing ratio of Rs on collector of Q2 will increase output level.
have some AC188s 2 try in a few dayz.

the 20mfd on the 1K wiper IS the tone control.
makes peak on rising edge of waveform.

2run on 9v pwr supply, just get polarity correct.
afn
tone

[petemoore]

Technology of the FF
 Just thought Id throw that in there in case you haven't checked...runoff groove and other places also have necessary FF info.

[Xplizit]

Thanks!

Markb, what site is that? project ggg ?

I've read the article on geofex. (was where I got the schematics)

I don't have a DMM though, never heard of it before actually.. I only have a volt/ampere meter.. maybe there's some DMM's at school, I'll ask on monday..

[spongebob]

:arrow: GGG = www.generalguitargadgets.com

Look under Effects Projects -> Distortion -> Fuzz Face

[Xplizit]

wow, great site.  

[Mike Burgundy]

DMM=Digital Multi Meter.
Your basic voltage and current meter with a numerical display (as opposed to needle-and-scale). Usually more bang for the buck than the old analog ones, plus a lot more handy features (like transitor testing, frequency, capacitance, etc).
Get one - you won't regret it.
As far as the GEO transistopr test is concerned, your voltmeter will do!