Original Os Mutantes/Regulus 8 fuzz mods... what values?

[Snufkinoob]

I've just put together the stock version of the fuzz, and quite like it, but I want to try out the mods shown on the last page of this PDF by the designer: http://bestnetworx.com/uploader/files/48/mutantesfuzz.pdf

You've got "Filter" "Attack" and "Limiter", but the values and text are really hard to make out. Does anyone know what they are?

[bloxstompboxes]

The first two pots are 100k log and 470k log. The last one is a single digit I think. I'm at work though and this monitor sucks. Might be better at home.

[Snufkinoob]

The first two pots are 100k log and 470k log. The last one is a single digit I think. I'm at work though and this monitor sucks. Might be better at home.

A 2: 100k Log
B 3: 470k Log

Any other guesses or confirmations?

[Kipper4]

It's Probably not much use but I found this

http://www.diystompboxes.com/smfforum/index.php?topic=95772.0;prev_next=prev

and it turns out there was some discussion on this fuzz over at Madbeans place too, maybe checkout Tagboards too.

[LucifersTrip]

yeah...the big thing to note is the error in c5, which should be .001 (or smaller)

[Snufkinoob]

yeah...the big thing to note is the error in c5, which should be .001 (or smaller)

I've just gone by this:

http://turretboard.knucklehead.dk/wp-content/uploads/2012/04/os_mutantes_schematic.jpg

http://turretboard.knucklehead.dk/wp-content/uploads/2012/04/os_mutantes.pdf


But there should be a .001uf/1nf between Q2 Collector and Base? Assuming you mean this schematic: http://www.luciferstrip.com/fuzz/osmutantes-distorter-rviii.jpg

[Hatredman]

I've just put together the stock version of the fuzz, and quite like it, but I want to try out the mods shown on the last page of this PDF by the designer: http://bestnetworx.com/uploader/files/48/mutantesfuzz.pdf

You've got "Filter" "Attack" and "Limiter", but the values and text are really hard to make out. Does anyone know what they are?

I have the original magazine where the circuit was published. Claudio was the Editor-in-chief then. (by the way, it's portuguese, not spanish).

Circuit A:
1. 4k7 resistor
2. 250k LOG
3. The 250K LOG pot's switch. The dotted lines are a failed attempt to convey that they are the same component.
4. As the texts explains, "4" is one side of C5. You remove C5 of the circuit and replace it with the Attack mod.
5. That's tricky. It's portuguese for "larger resistance side" (in a log pot, at mid-course, one side has 10% of the nominal pot value, the other has 90%).

Circuit B:
1.   .003
2.   .003
3.  470k LIN
4. Not connected
5. R7
6. Output jack

Circuit C:
1.  X   (yes, the letter X, and I guess we use this letter in English too)
2. 47k LIN
3. Not connected

X is a pad in the original printed circuit board.
The text below the circuit says: "X: see text".

X is explained elsewhere: the two limiting diodes are soldered on de PCB. Lift one lead of each diode, solder them together, solder a wire from them to the pot, and other wire from the pot to the (now empty) pad where one of the diodes used to be. This pad is X.

The original article, published in 1976 on a Brazilian electronics magazine called Nova Eletronica, is in Brazilian Portuguese and can be found here:

http://gamal.com.br/rviii.pdf

Enjoy.

[PRR]

> the letter X, and I guess we use this letter in English too

Latin X is derived from several Greek letters, and spread into about all modern European languages.

X seems to be very little used in most languages (third least-used letter in English), and takes on several pronunciations. Some languages try to avoid X, but there are too many old-old uses and also adopted words from other languages.

English is full of "X". Not a large number, but there are many words we can't spell without X.

"X" for an unknown math value traces at least to René Descartes. This is also how we got "X-rays".

"X marks the spot" on a treasure map, and "X" for an illiterate man's signing mark, have been around a long time.

> pad where one of the diodes used to be. This pad is X.

"X marks the spot". The plans already have A B C D and F; the re-work skipped ahead so the lettering would not be confused.

[John Lyons]

Thanks for posting that pdf hatredman.

[duck_arse]

English is full of "X". Not a large number, but there are many words we can't spell without X ....

.... my surname for one.

[LucifersTrip]

yeah...the big thing to note is the error in c5, which should be .001 (or smaller)

I've just gone by this:

http://turretboard.knucklehead.dk/wp-content/uploads/2012/04/os_mutantes_schematic.jpg

http://turretboard.knucklehead.dk/wp-content/uploads/2012/04/os_mutantes.pdf


But there should be a .001uf/1nf between Q2 Collector and Base? Assuming you mean this schematic: http://www.luciferstrip.com/fuzz/osmutantes-distorter-rviii.jpg

Yes, there is some cap there on most clones since the original had one. That cuts out noise, high end and tames the fuzz. Without it, you'll usually get too much noise...

A common "clone" that a bunch of people like is the Deadpool, which uses a .00047uF

http://www.madbeanpedals.com/projects/Deadpool/docs/Deadpool.pdf

[Snufkinoob]

I have the original magazine where the circuit was published. Claudio was the Editor-in-chief then. (by the way, it's portuguese, not spanish).

Circuit A:
1. 4k7 resistor
2. 250k LOG
3. The 250K LOG pot's switch. The dotted lines are a failed attempt to convey that they are the same component.
4. As the texts explains, "4" is one side of C5. You remove C5 of the circuit and replace it with the Attack mod.
5. That's tricky. It's portuguese for "larger resistance side" (in a log pot, at mid-course, one side has 10% of the nominal pot value, the other has 90%).

Circuit B:
1.   .003
2.   .003
3.  470k LIN
4. Not connected
5. R7
6. Output jack

Circuit C:
1.  X   (yes, the letter X, and I guess we use this letter in English too)
2. 47k LIN
3. Not connected

X is a pad in the original printed circuit board.
The text below the circuit says: "X: see text".

X is explained elsewhere: the two limiting diodes are soldered on de PCB. Lift one lead of each diode, solder them together, solder a wire from them to the pot, and other wire from the pot to the (now empty) pad where one of the diodes used to be. This pad is X.

The original article, published in 1976 on a Brazilian electronics magazine called Nova Eletronica, is in Brazilian Portuguese and can be found here:

http://gamal.com.br/rviii.pdf

Enjoy.

That's excellent, thanks a lot. 

Will definitely be tinkering around with that at some point, while brushing up on my Portuguese.