Wampler velvet fuzz transistors pdf

Junction transistor is generally called as bipolar junction transistor bjt. If you are are lusting over the sweetest sustaining fuzz or the dirtiest destroyed fuzz that can border on distortion, the wampler velvet fuzz is for. Wampler velvetfuzz guitar pedal if you are a fan of the tones of the players like david gilmour or eric johnson, then the velvet fuzz is the pedal you are wampler pedals, makers of the euphoria and sovereign, are proud to release the velvet fuzz exclusively for 45 days through pgs proguitarshop in oregon, usa. Dec 27, 2016 different types of transistors and how they sound.

I made a simple one transistor fuzz circuit for a test. The original fuzz face used nkt275 transistors made by a british company called new market. Not only they can amplify the signal, they can be con. Germanium transistors are what were used in the very first dallas arbiter fuzz faces. We dont just bombard you with marketing stuff, but you will get everything from product demos to the random streams of consciousness that happen to fall out of our heads. The layout also uses a 10k trimpot on the collector of q2 so that that biasing can be adjusted precisely. A bipolar junction transistor, bjt, gains its name from the fact that it uses both holes and electrons in its operation. Manufacturers warranty can be requested from customer service. Diodes and transistors pdf 28p this note covers the following topics. Chase tone 68 red velvet fuzz sweet, creamy, singing, multilayered 60s fuzz tone. A bipolar transistor, or more exactly a bipolar junction transistor, bjt, has two pn diode junctions which are back to back.

This article answers some common questions about the transistors used in cloning and modifying the fuzz face and similar pedals. The new fuzz face pcb and layout that i have drawn is based on the axis face circuit board, which is quite possibly the smallest and most compact fuzz face circuit board available. You started with simple resistive circuits, then dynamical systems circuits with capacitors and inductors and then opamps. Including a fuzz selector switch that could be wired as an standard dpdt toggle or as stomp switch for more versatility, and select in between the tight fuzz lm386 and the big fuzz 2n5089. The base current is said to control the collector current and this equation ic bib is called the transistor action equation. Wampler velvet fuzz quick start manual pdf download. Mullards first silicon transistors were the oc201 to oc207, pnp alloy types using the standard so2 metaloverglass construction such as the oc201 shown. The same oc75 transistors are used which give it a different voicing to the fuzz face which was of course hugely popular at the same time due to a certain young mr hendrix who was busy rewriting the book on great guitar tone.

To bias correctly the transistors you must plug your finished build into the power supply first. These semiconductor materials can either be a p type positive with an excess of holes, or a n type negative with an excess of. Transistors bipolar junction transistors bjt transistor basics a bipolar junction transistor is a three layer npn or pnp semiconductor device. I have tested several sets of transistors in both circuits, and i found that they work equally well with either biasing scheme. When an electric field is applied, the electrons move in the direction opposite. Wampler pedals velvet fuzz no doubt aimed at the gilmour fans the velvet fuzz is kind of a fuzz meets muff meets rat. Wampler velvet fuzz the velvet fuzz is a unique fuzz that combines amp emulation and 2 different selectable fuzz tones. A transistor may have only one kind of charge carrier, in a fieldeffect transistor, or may have two kinds of charge carriers in bipolar junction transistor devices. The toggle selects between a lm386 tight circuit, and a 2n5089 big circuit. Basic semiconductor physics, diodes, the nonlinear diode model, load line analysis, large signal diode models, offset diode model, transistors, large signal bjt model, load line analysis, small signal model and transistor amplification. Transistors are hand selected for superior tone and response. Field effect transistors are unipolar devices using one or either type of charge carrier.

In the last chapter, we studied bipolar transistors, which utilize a small current to. The medium gain set will get you the great balanced fuzz sound that you know from the better boutique fuzz pedals. Transistors are the active component in various devices like amplifiers and oscillators. Each fuzz circuit can be shaped with fuzz, volume and. Open, pure transistor drive produces a clean octaveup effect, and creates a. Those qualities are on full display within the velvet fuzz. Two germanium transistors type ac128 are selected by us for the best fuzz face sound. The voodoo fuzz is a unique circuit that combines two different selectable fuzz tones and a plexi amp emulation. Its a great time to upgrade your home music studio gear with the largest selection at. When flipped to the big setting, the velvet fuzz delivers classic fuzz tone with loads of. Velvet face fuzz pedal bc108 silicon version youtube.

The properties of transistors will be studied in this module so basically the focus here is understanding how transistors work. It is meant for beginners who are confused about what devices to use and where to get them, and as a reference for more experienced diyers. Many of these, typically one or two per atom in the metal, are free to move about throughout the metal. The bjt transistors have three terminals named emitter e, base b, collector c. Fuzz pedal 100100 type analog fuzz face with germanium transistors texas instrument. Transistor transistors are basic components in all of todays. Wampler pedals fuzz pedals 3 products audiofanzine. The advantage that the supa fuzz had was that the transistors were less prone. More than just a threeknob fuzz box, the pedal is able to change its voicing to suit anyones needs. They are our preferred transistors and would be used even if jimmy page himself wanted a twin bender. The wampler velvet fuzz represents an ampinabox pedal that has sought to capture the sound of a vintage fuzz run through a cranked amp. They are called active devices since transistors are capable of amplifying or making larger signals.

You can make fantastic sounding fuzz pedals with op amps, such as the op amp big muff or wampler velvet fuzz, and you can make great sounding overdrives and distortions with transistors, though usually with jfets and mosfets rather than bjts, like the catalinbread dirty little secret or the zvex box of rock. Types of transistors junction transistors and fets. This pedal is specifically tuned to 70s specifications, enjoy. Please, follow these basic instructions to place your order. The tight setting gives you big fuzz like distortion.

On the higher notes you will get a good balance between octave up and standard fuzz sounds. Discussion in the stomp box started by 11 gauge, sep 11. Add only the numerical characters of the item number. The value of b will vary from transistor to transistor. Theory of transistors and other semiconductor devices 1. The correct type of germanium transistor used in many fuzz pedals are special in that they require opposite polarity. It even sounds great through transistor and modeling amps.

In tight mode the wampler velvet fuzz cranks out massive fuzz like distortion and in big mode it delivers a classic compressed fuzz. The first generation fuzz pedals were based on the germanium transistor. So, my idea was to create circuit that was the soundfeeltexture of a germanium type fuzz circuit going into an amp. View and download wampler velvet fuzz quick start manual online. Information about fuzz pedal products from wampler pedals. I dont think anyone has posted this but apologies if it is already up somewhere. The voodoo fuzz is a unique circuit that combines two different. What sets the chase tone 68 red velvet fuzz apart from the.

Transistors are hand selected for superior tone and response 2. Diodes and transistors university of california, berkeley. Sep 20, 2016 in tight mode the wampler velvet fuzz cranks out massive fuzz like distortion and in big mode it delivers a classic compressed fuzz. At the end of the 60s, dallas arbiter began using bc108 transistors instead. As you can see, its the same basic idea, but with a different biasing scheme for q2. These can occasionally be found on ebay, usually advertised as germanium devices. What is special about powering germanium fuzz pedals. Chasetone 68 red velvet fuzz demo by tinkercity music. Earlier, the critical and important component of an electronic device was a vacuum tube. Introduction to junction fieldeffect transistors jfet. You also measured the voltage between the collector and emitter vce and graphed ic as a function vce. All rights reserved website by amplify creativeamplify creative.

Sep 11, 20 germanium is a chemical element with symbol ge and atomic number 32, thats used as a semiconductor in transistors and diodes, popping up in a few classic effects like the early period arbiter fuzz face, the storied dallas rangemaster and the maestro fuzztone. Mullard soon switched to using the bc prefix for silicon, and ac for germanium, eliminating the confusion. The name itself indicates that it has two junctions between ptype and ntype semiconductors. Most transistors are made from very pure silicon, and some from germanium, but certain other semiconductor materials can also be used. Transistors may be roughly grouped into two major divisions.

Then you learned how circuit elements do not operate the same at all frequencies. Its designed to capture the tone of a fuzz or muff into a marshall, which is very much what you get with a rat or cornish g2 but the pedal seems to fall between two chairs and doesnt quite make it up there with other. Introduction so far in ee100 you have seen analog circuits. Subjectively the sound of germanium offers a smoother, moreear pleasing. Follow us on facebook, instagram and twitter to keep up with the latest stuff from wampler.

Purchase the wampler velvet fuzz pedal from andertons. The bass boost toggle switch adds fat, full bottom end which is very useful in lower gain or lower volume bedroom practicing applications. The three layers are called the emitter, base and collector. With all the character, power, and tone of a classic fuzz the velvet offers all this and the option to tame the beast and bring it back under control. Conduction in metals metals are filled with electrons. Can i choose a different transistor type for a twin bender. A transistor is a linear semiconductor device that controls current with the application of a lowerpower electrical signal. In this course, we focus on simple transistor ampli. Introducing the velvet face fuzz, a dallasarbiter fuzz face clone utilizing selected and matched bc108 silicon transistors. It sounds great thru my other amps, jeff beckthickbombastic, but thru my prri it sounds like silverware in a food processor.