Fuzzfactory + Stupidly Wonderfull tone control

[kupervaser]

So if I understand correctly, the higher the output capasitor, the more bas I can get?
Anything above 10uF would be good already?

As for the tonestack, do I need a highpass filter or a lowpassfilter? 
Whicha capasitor sjould be used for the filter?
Should I place the filter after the 10uF output cap just like we descussed here before?

Thanx in advance,

[MikeH]

Yeah 10uf will yield the most lows.  You probably won't even notice much difference between 1uf or even 0.1uf and the 10 uf.  0.1 uf is already pretty much full bandwidth as far as guitar is concerned, in most applications.  Experiment with values though.  if you use an on/off/on toggle you want to mount the smallest cap in the center position.  This will be the position that yields the least low end.  And then mount the other caps on the outer lugs, and when the switch is at either end you'll get a mix between the outer cap and the small center cap (which will add negligible value- ie 10uF + .001uF in parallel = 10.001uF; basically, no difference), which will yield more bass, and the most (all) bass.  If you want to get crazy you could add a rotary switch will all kinds of output cap options for all kinds of bass settings.

As for a low pass filter in most designs I'd put it right before the volume control, but this is a different animal, so you might try putting it right before the output cap.  Start with a 50K linear pot or so, and connect the output signal path to lug 2 (or 2 and 3) and connect a cap (start with 0.1-0.22 uf and adjust from there) to lug one and the other side to ground.  This will allow you to roll off highs, but you will lose some signal as you do.

[bumblebee]

The best way to tame the highs on the fuzz factory is to replace the input cap with 22uF and output with 47uF.

[kupervaser]

The best way to tame the highs on the fuzz factory is to replace the input cap with 22uF and output with 47uF.

What about gaining some more lows? I need more bottom from this pedal.

Thanx in advance,

[ode2no1]

upping the input and output caps will both give you more lows and cut highs. i built one and did 22uF for the input and 47uF for the output and honestly i thought it was a little bit too much, but that's me. just socket the two caps and go from there.

[kupervaser]

Right thanx a lot, will do that. I will post my results

[MikeH]

A lot of it depends on the settings... there's a lot of bass in there already on many of the settings.  When the starve is way down, there's a LOT of low end.  Enough to make my speakers flub out.  Increasing the in/out caps doesn't actually tame highs (at least I don't think), they just get drowned out a little by the additional low end (on most designs)

[kupervaser]

I always use the same settings, stab and gain on full and than adjust the gate and that other knob to get it silent. I always use a VOX duel overdrive. And when i turn the FF it just has to much highs and not enough low compared to the vox. I need them balanced. I will try to sweep the capasitors first. See how far i'll come. If that gives me enough low end but leave me with too much highs I will put a tone control in it just lik discussed here.

Thanx everyone.

[bumblebee]

The best way to tame the highs on the fuzz factory is to replace the input cap with 22uF and output with 47uF.

What about gaining some more lows? I need more bottom from this pedal.

Thanx in advance,

Naturally it increases lows.
You can even try 100uF in/out, I've done this and its not muddy in the least.

[Processaurus]

The best way to tame the highs on the fuzz factory is to replace the input cap with 22uF and output with 47uF.

What about gaining some more lows? I need more bottom from this pedal.

Thanx in advance,

Naturally it increases lows.
You can even try 100uF in/out, I've done this and its not muddy in the least.

The output cap and whatever resistance to ground after it form a simple hipass filter, which attenuates low frequencies.  It doesn't create or boost low frequencies, all it can do is not cut what is coming in on the other side of the cap.  Once you're letting all the audible frequencies through (>20Hz), there won't be anything to gain by making that cap bigger.

To boost bass you'll need an active bass boost circuit, or passively cut the mids and highs in a shelving kind of way.  Lots of ways to do that, that are well documented here.  Have you seen the "duncan tone stack calculator" online?  It's a fun tool for designing tone controls:
http://www.duncanamps.com/tsc/

[bumblebee]

Well the impression iot gave me was tons more lows, thats the desired effect and the cap swap does it.
WHy it does it, I have no idea if what you say is correct.

[kupervaser]

OK i will put sockets in the pcb and try 2 100uF capacitors first. If i dislike it I will try different values. In the worst case i will put a passive tone control just after the volume.


Thanx