AMZ FX ANALOG ALCHEMY GEOFX MEF ROG MEF DIY WIKI

Are any of you guys interested in an old school silicon fuzz project ?

Started by Dragonfly, July 02, 2007, 08:53:00 PM

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Dragonfly

July 02, 2007, 08:53:00 PM
Yeah, its another fuzz...but it sounds pretty cool.

If you guys are SERIOUSLY interested in building it, i'll post the schemo and a PCB layout.

HERES A SOUND SAMPLE

???

jlullo

#1
July 02, 2007, 08:54:54 PM
this sounds very cool!  bring it on, ac!

petemoore

#2
July 02, 2007, 09:20:41 PM
  The riffing made the video image play a really neat patterns.
  Sounds almost like a momentary switch 'slighting effect' on the bass note attacks.
  Dialed in wtih HB's ?
Convention creates following, following creates convention.

caress

#3
July 02, 2007, 09:22:34 PM
sounds great!

km-r

#4
July 02, 2007, 09:28:37 PM
hey! that sounded cool~!!  :icon_biggrin:
Look at it this way- everyone rags on air guitar here because everyone can play guitar.  If we were on a lawn mower forum, air guitar would be okay and they would ridicule air mowing.

Dragonfly

#5
July 02, 2007, 09:33:43 PM
Quote from: petemoore on July 02, 2007, 09:20:41 PM
  The riffing made the video image play a really neat patterns.
  Sounds almost like a momentary switch 'slighting effect' on the bass note attacks.
  Dialed in wtih HB's ?

The clip is a 335 with a PAF in the bridge position...direct into a Line 6 Toneport...

The signal compresses just slightly as you play it, and the note blooms a bit thereafter... (nice "hype" words, eh ?)

jlullo

#6
July 02, 2007, 09:35:07 PM
it almost reminds me of those waaaay over the top big muff sounds in some old smashing pumpkins songs

foxfire

#7
July 02, 2007, 09:37:00 PM
i had a ton of fun with the whirlygig and now you drop this on me? not to mention it was your orpheum fuzz layout that made me think that i could build a pedal. you may be the reason my girlfriend doesn't think i love her anymore? and no i still haven't built the orpheum yet.

Dragonfly

#8
July 02, 2007, 09:39:22 PM
Quote from: foxfire on July 02, 2007, 09:37:00 PM
i had a ton of fun with the whirlygig and now you drop this on me? not to mention it was your orpheum fuzz layout that made me think that i could build a pedal. you may be the reason my girlfriend doesn't think i love her anymore? and no i still haven't built the orpheum yet.


:icon_biggrin:

Pushtone

#10
July 02, 2007, 10:16:30 PM
Sounds great! If you post we will build it.   :icon_smile:

Sound VERY good in the lower registers. A good fuzz for baritone guitar? Me thinks so.

I'm interested because it sounds different that anything I've built so far in the Fuzz/Dist category.

A nice addition to your current gallery IMO.
It's time to buy a gun. That's what I've been thinking.
Maybe I can afford one, if I do a little less drinking. - Fred Eaglesmith

Dragonfly

#11
July 02, 2007, 10:25:50 PM
Quote from: Pushtone on July 02, 2007, 10:16:30 PM
Sounds great! If you post we will build it.   :icon_smile:

Sound VERY good in the lower registers. A good fuzz for baritone guitar? Me thinks so.

I'm interested because it sounds different that anything I've built so far in the Fuzz/Dist category.

A nice addition to your current gallery IMO.

I havent tried it on bass or baritone yet, but i would think it would work well. Surprisingly (well...maybe not surprising to some), it doesnt use large value caps for the In /Out / interstage.

Anyway, I'll post the schem / PCB layout below. A useful addition would be a switch with a 22pF cap to ground to choose whether you want to roll off the extreme highs or not.

Dragonfly

#12
July 02, 2007, 10:28:57 PM




This PCB layout is untested, but should work fine :





And heres the "one knob" prototype I built today :



tungngruv

#13
July 02, 2007, 10:33:21 PM
Great playing Andrew!!!!!

Dragonfly

#14
July 02, 2007, 10:34:35 PM
Quote from: tungngruv on July 02, 2007, 10:33:21 PM
Great playing Andrew!!!!!

Thanks...I'm pretty much a "hack", but I have fun just improvising and messing around ! :)

The funny thing is that I get far more guitar playing time when I'm testing out circuits than when I just pick up a guitar for no reason.

tcobretti

#15
July 02, 2007, 10:35:22 PM
Very cool sounding, and I recognize some of the building blocks, and want to compliment you for your implementation of the circuit.

Very nice!

And that riff is perfect to highlight the pedal.

Dragonfly

#16
July 02, 2007, 10:37:55 PM
Quote from: tcobretti on July 02, 2007, 10:35:22 PM
Very cool sounding, and I recognize some of the building blocks, and want to compliment you for your implementation of the circuit.

Very nice!

And that riff is perfect to highlight the pedal.

Thanks...its a simple, easy to build circuit...but little things like Q2's collector resistor (1 Meg) can make all the difference.....Q1 collector runs at 4.5 - 4.8 volts, and Q2's collector is around .8 volts or so.

tcobretti

#17
July 02, 2007, 10:51:13 PM
Yeah, that's what I thought was interesting.  Q1 just boosts the signal into the mis-biased transistor.  Very nice!

Fenderstrat

#18
July 03, 2007, 01:44:52 AM
Thats awesome, sorry for the newbie question but how would you go about making a bass version of this?
By all logic it should work....   but it doesn't.

Dragonfly

#19
July 03, 2007, 02:23:08 AM
Quote from: Fenderstrat on July 03, 2007, 01:44:52 AM
Thats awesome, sorry for the newbie question but how would you go about making a bass version of this?


What "I" would start with is raising the input resistor (the 4K7) to a larger value (100K ?), bring the input cap up to a .1uF, and change the .022uF caps to .047's. That would be a "starting point", though it may need further adjusting. If that didnt make it good for bass, I'd raise the 22uF electrolytic cap to a 100uF...though you'll likely need to adjust the 10K collector resistor on Q1 so that the collector reads about 4.5V,
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