Showing posts with label Gilmour. Show all posts
Showing posts with label Gilmour. Show all posts

Saturday, October 5, 2013

The Real Muff Pie



The Big Muff Pi clone
OK, you guys, we are very close to getting FuzzQuest blog on a climax this time.

If I had to choose 3 fuzz pedals to achieve the widest spectrum of fuzz sounds I would say that the 3 top pedals would be the Maestro Fuzz Tone, The Fuzz Face and the EHX Big Muff Pi (of course I could have chosen 3 other pedals if you asked me that question tomorrow morning). The Maestro Fuzz Tone is what you would call an early fuzz sound (1962-1966), similar in many ways to the early Tone Benders, raspy, buzzy, noisy and grainy like the Fuzzrite, Orpheum and the Super fuzz. The Fuzz Face is the legendary Hendrix or Gilmour fuzz sound (1967-1973), very fat, smooth and much heavier. However, when you take fuzz a step  further (1971-2013) into metal, doom, grunge, acid blues and other heavy rock forms, there is one fuzz to rule them all. It's almost the end of the journey for you if you are after that kind of sound. After that you can maybe chain 2 fuzz pedals in a row, have boosters in front, make some mods to the design, but it doesn't really get any heavier than this (there are some attempts, though...).

The Big Muff Pi pedal is the holy grail of fuzz pedals for many rock guitarists. It's very much like the Tube Screamer in its legendary reputation. Both designs were pretty simple and became the source for numerous versions, clones, re-issues and variants. Both designs became cornerstones in rock history and made a huge impact on the development of rock and guitar sound. You could say that the Tube screamer is the overdrive in the same way that the Big Muff is the Fuzz pedal and it's what many people would describe as the sound of fuzz, without going into details too much.

The Big Muff designed by Bob Myer and Mike Matthews was originally based on the earlier designs of fuzz pedals heavily used by the late great Jimi James, a.k.a. Jimi Hendrix, and was first issued in NYC around 1969. The fuzz that roared out of this pedal was so thick, rich, creamy and heavy that once people started using it, there was no way back. The name Big Muff with the PIE sign is obviously a sex related name (see the 22/7 fuzz post on this blog), based on the association of the word muff pie (oh boy) with the words fuzz, fuzzy, fuzz face and the general habit of pedal designers to name pedals after sexist male associations (Ever heard of the Merkin fuzz?). The pedal retained sound consistency due to the use of Silicon transistors and the use of 4 of them meant you had a buffer pre gain stage, a dual gain stage similar to older designs and an active tone control. Luxurious design! throughout the history of this pedal, various transistors and a lot of the passive parts values changed. Sometimes for getting different sound, but mostly due to changes in the parts inventory of the factory at the time. This resulted in a huge amount of variants. The most famous versions became the Triangle (for the arrangement of the knobs) which is the original design with its silver enclosure, the Ram's Head version which had slightly different values and transistors, the Green Russian made in Russia during the mid-90s with its famous khaki army-like enclosure and the 1977 V4 design with its red and black graphics which became the most famous graphical design for the big muffs re-issues.

Below are two images of typical BMP versions from various eras:
The USA designs from the late 60s through the 70s and the re-issues of the 90s and the 21st century

The Russian designs from the 90s

It would be redundant to go deep into the history and circuit design of this beast of a pedal as there is so much info on the web already. Just take a look at:
or

a quick version review can be found on:

On these pages you can find anything from the transistors used on each design, the schematic nuances, the enclosure changes and the artistic graphic designs. Who played what is also probably very interesting for many people. Hendrix used the original version during in his late career, Gilmour started using Big muffs around 1975-1976 and later on. He used the original Triangle version and the Violet and Ram's Head version from the early 70s .Billy Corgan and his Pumpkins used a 1978 op-amp version from 1978 in the Siamese Dream album. 8 tracks of muffed guitars at once all through a Marshall JCM800 with a Strat or a Les Paul. "Huge Huge Sound" was what Billy called it. After the album came out the price of a BMP pedal sky rocketed from 40 bucks to 200 bucks!!! What a comeback. J. Mascis of Dinosaur Jr. and Witch used a lot of early BMP versions throughout his career. He likes to put two in a row for super thunderous muff sound. Jack White of the White Stripes has used the BMP quite extensively although he is also known for using a lot of early fuzz pedals as well. 

A huge list of BMP users can be found on:
http://www.kitrae.net/music/big_muff_users.html
The list includes so many names it's hard to count but just to name a few: Robert Fripp (Guild Foxey Lady 1972-1974), Steve Howe of Yes (Triangle), Thurston Moore and Lee Renaldo of Sonic Youth (Sovtek "Civil War"), Kurt Cobain of Nirvana, John Frusciante of Red Hot Chilli Peppers, The Edge of U2, Pete Townshend of The Who, Dan Aurbach of the Black Keys, Kevin Shields of My Bloody Valentine, Jamie Cook of Arctic Monkeys, Cliff Burton of Metallica, Ace Frehley of Kiss, Jeff Pinkus and Paul Leary of the Butthole Surfers, Stephen Malkmus of Pavement and many many others. 

The ZUS Pi
Enough of the Big muff stories and on to the DIY clone build: My build was made with a wedged enclosure and a circuit design very similar to the Violet Ram's Head BMP from 1973, the early Guild Foxey Lady and also similar to the transistor V4 design from the 1977-1978 era. These versions were known for their use of the 2N5133 transistors. In fact the importance of these trannies is most crucial for the sound on Q2 and Q3. Q1 and Q4 are less critical so I used BC238 trannies which are medium gain trannies. The knobs are chicken black and the 3PDT switch enables true bypass. The sound is pretty amazing, rich and smooth fuzz on any setting. The TONE is super effective and on different areas really changes the sound of the fuzz, it's not the regular passive hi-cut we know from other designs. This is why the BMP tone stack became so popular and was implemented in so many different pedals. The SUSTAIN sounds dull on the minimum setting but anywhere above it is absolutely fuzz-a-licious. I used orange rooster knobs and painted the wedge enclosure with some flame-like brush strokes.

Build any of the versions as shown below:
or:
or:

What a huge selection of schematics, hu? Triangle or Ram's Head if you want vintage style. op-amp if you want the Smashing Pumpkins sound, Civil War or Green Russian for that grungy alternative rock sound. This is a monster fuzz any way you build it. Stack two in a row or one with an overdrive behind it or a fuzz face style pedal in front of it and you can get all sorts of fuzz bliss.

Here are some noises I made with my version:


Saturday, November 10, 2012

The Pink Face

The Pink Face
Throughout the history of fuzz pedals, fuzz guitarists and psychedelic fuzzy solos, there is no fuzz which has received greater attention than the legendary Fuzz Face. Originally produced by Arbiter Electronics in England and appeared during 1966 the unit was an immediate success. Many of the greatest guitarists in rock history played their best solos and riffs through a Fuzz Face including Hendrix, Gilmour, Blackmore, Harrison, Townsend and many more. Nevertheless, the dependency of the Germanium transistors on temperature resulted in a lack of tone consistency and many players suffered on stage from this effect. To circumvent this issue Dallas Arbiter started issuing Silicon versions of the FF somewhere around 1969 replacing the NKT275 trannies with BC108. Silicon was the new hype at the time and it seemed that by 1970-71 everybody was switching to Silicon faces. Hendrix's Band of Gypsys, Gilmour on all PF albums and tours since 1971 including all of the solos on Meddle and Dark side of the Moon are probably the most documented examples. One of my favorite guitarists Michael Karoli (Can) also used Silicon Fuzz Faces to create his raw and untamed distortion throughout the history of Can, so this was enough to get me going. 

Both designs are pretty close with the Germs being mostly PNP and the Silis being NPN. Comparing the sound of the Germanium units with the Silicon ones it is often said that while the Germs sound raspy, warm and sweet, the Silicons are brighter, edgy and have more gain. Well....from my builds....this statement is....TRUE!

The original 1966 Arbiter Face - Germanium
On my Fuzz quest I really couldn't imagine the journey without understanding the differences between the two FF versions and there was no other way than building the two. After I finished the Germanium Fulltone version I started to drown with info on the Silicon versions: Fulltone, Analog Man, Dunlop, Runoffgroove, GGG you name it. I looked through dozens of schematics and breadboarded some of them. I even looked at the German Schaller Fuzz (FF variant) after reading that Michael Karoli (CAN) used one. Actually, the first fuzz I ever built was the Runoffgroove SiliFace II and I loved it for some months. That was what got me interested in fuzz pedals in the first place, My Fuzz quest started because one fuzz was not enough to get the range of buzz tones I was after.

The 1970 Dallas Arbiter Fuzz Face - Silicon
Due to the fact that the Fuzz Face design is tolerant to part values many versions have been issued over the years and the amount of Fuzz Face versions became quite vast (just like it happened with the Big Muffs or the Tube Screamers). The design is so simple that small part changes resulted in some sonical change. After all the entire unit incorporates 4 resistors, 3 caps, 2 transistors, 2 pots and 1 switch. That's it!


4 resistors, 3 capacitors, 2 transistors, 2 potentiometers
The sound I was aiming for was that of Gilmour playing the Time solo on the album version of the Dark Side. I started out with the GGG early 70's Boutique NPN Fuzz Face after my success with the GGG 60's version. I liked the PRE GAIN knob and the circuit seemed pretty good, but something was missing. I didn't box the circuit and it stayed on the shelf for some time. I built a few other Fuzz pedals and when I thought I understood more about what I wanted I revisited the circuit. This time I modified the circuit based on the Axis Face version by Phillip Bryant modified by Brett Robinson. 

Gilmour's early 70's rig

I did a lot of testing using Hi-Watt amp emulations, tweaked many of the parts in this little circuit, changed trannies and used several guitars. Surprisingly, I ended up using 2N2369 (hfe=70-90) for Q1 and BC109 for Q2 (hfe=200). The BC108C I had (hfe around 400-550) seemed to be too pumped up for my taste. I settled on a 50kA pot for the PRE GAIN and a 100kA for the VOLUME. 220n cap for the input and 30p cap on the bridge for lo-pass filtering. I replaced the CONTOUR pot with a 470R resistor and kept the 22uF Fuzz cap. I kept the reverse polarity protection and cut off the strange feedback diode bridge which didn't seem to affect the sound. Biasing Q2 I got 4.5V with resistance being about 3k3 so that's about 4k3 total Q2 bias. It's funny that this fuzz is currently my most tweaked fuzz circuit to date. Only a few parts but so much experimentation. Other fuzz circuits you get the schematic, the parts, breadboard and maybe test a few transistors, bias them and that's it. Along with the early Tone Benders and the Maestro Fuzz Tone which are more complex it's one of the toughest, considering its architecture.

Luckily, somebody at work who knows I am always on the lookout for metallic enclosures, gave me this great candy box. I couldn't have asked for a better design with those pink pigs on a round enclosure making it suitable for a Fuzz Face and for a Pink Floyd related sound, so I jigsawed it to the right height, called it Pink Face, mixed my glass paint bottles and came up with a magical pinkish tone... Perfect!

The sound is well worth the effort. It's not as warm or sweet as the Germanium version but it does give you the Time solo style. Bright when the FUZZ pot reaches max. The PRE-GAIN gets you that rolled off effect for cool rhythm chords and sparkly clean chops. Using a treble booster in front enables you to get great tones with the FUZZ knob below max. I also tested it with a Wah in front and no buffer was needed. Definitely a must build on my fuzz journey towards a better future.

If you want to learn more about the the topology of the fuzz face there is no better place than R.G. Keen's article: The Technology of the Fuzz Face. It helped me a lot in choosing the right part values and testing transistors both in my Germanium unit and this recent Silicon unit. It is really the Fuzz Face Bible, highly recommended and insightful. 


The schematic I drew up in Chrome Circuit Lab is shown here for reference but feel free to use it, tweak it or twist it. I will update it if I decide to change it. The feedback diode did not really do anything so I left it as in the Fulltone version.



Hope you get to enjoy it! You can also have a blast using Mark's vero layout on Tagboardeffects.blogspot,com

There is a lot of Fuzz Face info all over the web, here are some more recommended pages for extended reading on this matter:






Monday, July 23, 2012

The Fluffy Fuzz Cake

The Big Muff Pi (~3.14) was the first major fuzz pedal by the NY based company - Electro-Harmonix (EHX). The legend says that the first units were brought in 1969 to Manny's Music Store on 48th Street, NY, and a week or so later Hendrix picked one up. The circuit was aimed to recreate some of the fuzz tones conceived by Hendrix using a more complicated design than that of most fuzzes from those days. It was supposed to do everything the FuzzFace did with some extra features and a nicer sustain.

Over the years, a lot of Big Muff variants appeared, each with it's own characteristics and subtleties. Some due to part changes by EHX and some by the fact the the company went out of business and other manufacturers issued they're own versions. Gilmour switched from the Silicon FuzzFace to a BigMuff Pi somewhere around 1977. All the solo guitar work on Animals and The Wall incorporates a Big Muff. Santana also used this unit during the mid 70's. During the late 80's and early 90's the vintage Big Muffs and other variants, most notably the Russian Sovtek version, were a big part of the grungy alternative sound of the bands which defined the genre like Sonic Youth, Smashing Pumpkins and Nirvana. Mudhoney went as far as naming their Ep "Superfuzz Bigmuff". Having so much legacy and history around this pedal, I had to try it but I couldn't decide which version to go for. It was actually the first fuzz pedal that was named a distortion pedal.

The original circuit I built was taken from the GeneralGuitarGadgets site shown here. Some of the changes made by EHX over the years as well as the designs made by other manufacturers can be found on the same website here. Although they rely on the idea of cascaded gain stages with diode clipping on each stage, they all sound a little different (tonestack, caps, trannies etc.).

The most gratifying unit I built around the Big Muff concept was the ROG 22/7. The ROG team did it again with a super cool design to get the entire pie in one bite. The name comes from the number pi, but the sound is the fluffy triangular pie which we love so much (How did EHX ever get a way with such a nasty name for a pedal?). The most notable thing about the pedal is that it is based around a CD4049UB IC which makes up the gain stages, and the fact that you have 3 variants in a single circuit!!! the original classic sound, the flatter Russian Sovtek sound and the scooped Ram's Head version. What a great pedal. Every guitarist I played with loved it. It's sustain is super smooth and you can get a very heavy Billy Corgan/Thurston Moore sound easily. Very very cool. The circuit can be found here. A lot of info on this pedal can be found on the Pistones website.


I admit that I did not intend to dwelve so deep into Big Muff territory when I first started my quest for the ultimate fuzz, but this is a great versatile fuzz unit and could easily satisfy grunge heads and fuzz heads alike.