Lovepedal Karl Fuzz.

Greg · Post by **Greg** » 18 Apr 2011, 13:16

Here's one that's been eluding us for too long.
A pretty good sounding Fuzz with some Octave / Ring Mod charactersistics.
The build quality is a bit shocking under that goop !

Hides-His-Eyes · Post by **Hides-His-Eyes** » 18 Apr 2011, 13:17

What possesses someone to use resistors as wire like that?

Greg · Post by **Greg** » 18 Apr 2011, 13:25

It appears to be an adaption of Tim Escobedo's Tripple Fuzz.
Easy to build and low parts count, and it sounds good... definitely worth it IMO.

Technically it's not great (I don't think mictester will be impressed

), and I'm sure it could be improved in some areas.
The Pulldown Resistor is redundant as it's in parallel with the 5K pot.

Vero is built and tested.
I omitted the second 47uF cap on the power supply (suggest maybe adding a 0.1uF instead) and I added a protection diode..

Enjoy.

culturejam · Post by **culturejam** » 18 Apr 2011, 13:58

Greg_G wrote:The Pulldown Resistor is redundant as it's in parallel with the 5K pot.

Bwah!

That should yield a net resistance of 4.975K.

joeboo88 · Post by **joeboo88** » 18 Apr 2011, 14:01

Hi Greg Thanks for posting this. I looked on youtube and found only one (clip)version without a tone control.
Is the ones with the tone control a later version?

Hides-His-Eyes · Post by **Hides-His-Eyes** » 18 Apr 2011, 14:04

Is that 4.975 for a 'rawer sound'?

RnFR · Post by **RnFR** » 18 Apr 2011, 14:20

why two different large sized power rail decoupling caps? I guess I should just stop asking logical questions- there are no logical answers.
I have always been intrigued by the trippple fuzz. it was one I tried to build when I was first starting out, but never got working. I'd like to revisit that second section again sometime. I wonder, are matched transistors a factor in the sound?

Hides-His-Eyes · Post by **Hides-His-Eyes** » 18 Apr 2011, 14:51

RnFR wrote:why two different large sized power rail decoupling caps?

Rawer sound.

roseblood11 · Post by **roseblood11** » 18 Apr 2011, 20:00

I guess Q2 is a 2n3906?! Schematic says "2n2906"...

Greg · Post by **Greg** » 18 Apr 2011, 22:53

joeboo88 wrote:Hi Greg Thanks for posting this. I looked on youtube and found only one (clip)version without a tone control.
Is the ones with the tone control a later version?

He's made them both ways for a while I think.. but by all reports the Tone control is pretty useless anyway (subtle is the answer when people say they don't do much).

roseblood11 wrote:I guess Q2 is a 2n3906?! Schematic says "2n2906"...

Sorry.. yes. A typo.
Fixed.

Greg · Post by **Greg** » 18 Apr 2011, 23:14

RnFR wrote: I wonder, are matched transistors a factor in the sound?

I don't think so.
In the de-gooped unit they measured 160 and 205.

rocko1369 · Post by **rocko1369** » 19 Apr 2011, 00:30

Wow, you'd think $189 would be a bit...neater?
The good thing about this is I feel better about my own work.

roseblood11 · Post by **roseblood11** » 06 Jun 2011, 21:36

My vero layout, 5mm leg spacing for the foil caps:

viewtopic.php?f=7&p=212285#p212285

dorrisant · Post by **dorrisant** » 22 Jun 2012, 23:49

Would anyone be willing to post the voltages for this pedal? I'm having some issues with my build... very splatty decay. Seems like it fades out really splatty then ramps up again. Maybe I'm just too unfamiliar with the way it is supposed to work.
I'm gonna hit youtube for some demos... educate my ears.

Tony

dorrisant · Post by **dorrisant** » 14 Sep 2012, 13:20

I still have this thing sitting on my bench... waiting to see if you guys could post some voltages from a working unit....

?

Tony

kinski · Post by **kinski** » 20 Dec 2012, 15:32

Hi Roseblood11, thanks so much for the layout. I just built this using your layout. However, all I'm getting is a very very mild overdrive out of this thing. Its so simple, and I don't really see anything wrong. Any ideas?

kinski · Post by **kinski** » 20 Dec 2012, 15:46

Oh Yeah,

Q1

6.22
1.08
0.83

Q2

3.88
4.49
4.61

Q3

4.61
4.49
5.09

dorrisant · Post by **dorrisant** » 20 Dec 2012, 16:46

Kinski,

Much appreciated. I will dig it out and check those voltages.

Tony

kinski · Post by **kinski** » 20 Dec 2012, 17:00

Thanks! Much appreciated!

I did not socket the transistors. Maybe there is a faulty transistor. I've checked the board many times over and can't find anything out of place.

kinski · Post by **kinski** » 20 Dec 2012, 17:09

Dorrisant, just so you know, if you see my post above my posted voltages, my build it also not working correctly. It just a boring overdrive. So my voltages may not be the best to compare to.

Lovepedal Karl Fuzz. [traced]