D*A*M - Meathead [traced]
Owkey, really love this pedal, very nice fuzz, pictures of the perfboard:
https://s70.photobucket.com/albums/i94/ ... 0Meathead/
Pot: 500k Lin
Left to right:
Elco 1: 47u
Film cap: 10nk 400
R1: 18k
Trans1: T2n3904
R2: 120k
R3, vertical: 819 ohm
R4: 4,7k
Trans2: BC182L
Tant blue: 471
R5: 1k
Elco2: What i Can read : 021 ko (1nF?)
Film cap2: 22nk 400
Tant blue2: 47
box is an Bimbox n°5003-13
enjoi and thanks to this amazing forum!
https://s70.photobucket.com/albums/i94/ ... 0Meathead/
Pot: 500k Lin
Left to right:
Elco 1: 47u
Film cap: 10nk 400
R1: 18k
Trans1: T2n3904
R2: 120k
R3, vertical: 819 ohm
R4: 4,7k
Trans2: BC182L
Tant blue: 471
R5: 1k
Elco2: What i Can read : 021 ko (1nF?)
Film cap2: 22nk 400
Tant blue2: 47
box is an Bimbox n°5003-13
enjoi and thanks to this amazing forum!
- The Rotagilla
- Diode Debunker
Nice, thanks!
The television will not be revolutionized.
- analogguru
- Old Solderhand
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Am I right that you want to see now theenjoi and thanks to this amazing forum!
D*A*M - Meathead schematic
enjoy,
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- RnFR
- Old Solderhand
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alright! i heard this thing was really cool. i think i'll put it on the breadboard tonight. thanks!:applause:
"You've converted me to Cubic thinking. Where do I sign up for the newsletter? I need to learn more about how I can break free from ONEism Death Math." - Soulsonic
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- Greg
- Old Solderhand
It is a great sounding Fuzz...
Many thanks to Stefcuypers and to AnalogGuru...
Many thanks to Stefcuypers and to AnalogGuru...
culturejam wrote: We are equal opportunity exposure artists.
- briggs
- Tube Twister
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nice and fast analogGuru! thanks, did someone allready made a pcb layout?
- bajaman
- Old Solderhand
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YAFF
surely you do not need a PCB for this - Yet Another Fuzz Face
bajaman
surely you do not need a PCB for this - Yet Another Fuzz Face
bajaman
be kind to all animals - especially human beings
- RnFR
- Old Solderhand
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ha! i guess one should actually take a good look at the schem before commenting!
supposed to be a nice one tho!
supposed to be a nice one tho!
"You've converted me to Cubic thinking. Where do I sign up for the newsletter? I need to learn more about how I can break free from ONEism Death Math." - Soulsonic
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- bajaman
- Old Solderhand
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well at least it is silicon - so should sound the same and work consistantly well
bajaman
bajaman
be kind to all animals - especially human beings
- MoreCowbell
- Transistor Tuner
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this is the older 1 knob silicon version...i'm not sure if Dave has changed the 1 knob version since this one was made a couple years ago.
there is also a "deluxe" version with fuzz, filter, and volume controls.
there is also a "deluxe" version with fuzz, filter, and volume controls.
- MoreCowbell
- Transistor Tuner
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BTW... .01u seems "too small" for the input cap. I didn't look at the pictures, but .1u seems to make more sense.
Maybe I should look at the pictures first , before making that statement...
Maybe I should look at the pictures first , before making that statement...
- seniorLoco
- Resistor Ronker
Yup... no meat with .01uf ???MoreCowbell wrote:BTW... .01u seems "too small" for the input cap. I didn't look at the pictures, but .1u seems to make more sense.
Maybe I should look at the pictures first , before making that statement...
"Curiosity may have killed the cat, but it saved the mice, who ate the cheese."
The green caps soften the sound a lot, yielding in a rounder fatter tone. With other caps the Meatball will have sound more harsh, clearer and with more treble.
Those green caps are crap for hifi stuff but IMHO they are really good in a simple fuzz circuit. I wouldn't call this Mojo, hype or whatever, they only sound different compared to other types.
JHS
Those green caps are crap for hifi stuff but IMHO they are really good in a simple fuzz circuit. I wouldn't call this Mojo, hype or whatever, they only sound different compared to other types.
JHS
- bajaman
- Old Solderhand
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Agreed - less top end = smoother sound and less fizzI wouldn't call this Mojo, hype or whatever, they only sound different compared to other types.
I like the sound of the old Crowther Hot Cake when compared to the current version his wife is building.
It had a crappy (for hifi) 741 op amp - the new one has a TL071.
AND - even Paul knows the sonic benefits of those crappy mylar capacitors - he has always used them - still does.
cheers
bajaman
be kind to all animals - especially human beings
- lynessmy
- Breadboard Brother
Redrawn Schematics to generate the layout .stefcuypers wrote:nice and fast analogGuru! thanks, did someone allready made a pcb layout?
Component Layer
Trace Layer
Size of board is 38mm Wide x 28mm Height. (shrink to about 25%)
Layout is not yet tested but all connection matched the redrawn schemetics.
Man...this i red hot...fresh from the oven...i don't even put it up on my blog yet....
1M pull down resistor is not in the schematic shared by analoguru. It was added for just in case.
103 input cap was said to have "NO MEAT". I put an optional 102 / 104 in the layout.
Additional pads added to cater different pitch sized for 470p cap.
Ignore the tant mark for the 47p cap.
Diode are 1n400X.
Sq pad for POT is the first lug.
Sq pad for E-Cap denote positive terminal. As usual...
- lynessmy
- Breadboard Brother
I build this yesterday with positive result but the design is not very tweakable.
The pot i labeled as DRIK typo there....Should be DIRT as in the schematic...is not more than a volume knob.
I will replace 1k resistor with a pot to see what can i get.
that make it like the Si NPN fuzz face.....
The pot i labeled as DRIK typo there....Should be DIRT as in the schematic...is not more than a volume knob.
I will replace 1k resistor with a pot to see what can i get.
that make it like the Si NPN fuzz face.....
Thanks lynessmy for the pcb layout and comments! Very nice blog also! keep up the good work!
The Meathead is a typical Si-FF/TB clone, maybe with a somewhat refined sound with a bit more gain and bite, nothing more. The sound depends more or less on the gain of the used trannies and the type.
I have a program that calculates the nominal gain for the trannies in a FF or RM in a circuit with user defined values but I'm short on time to make such al calculation. With my experience I guess both trannies have app. 150-180 hfe.
Higher or lower hfe won't match the collector Rs and the feedback R.
JHS
I have a program that calculates the nominal gain for the trannies in a FF or RM in a circuit with user defined values but I'm short on time to make such al calculation. With my experience I guess both trannies have app. 150-180 hfe.
Higher or lower hfe won't match the collector Rs and the feedback R.
JHS