What transistor is in a Fuzz Face?

The transistors used in a fuzzface make all the difference in tone, feel, and amount of fuzz/cleanliness. Germanium transistors were the first type of transistors generally available, starting in the early 1960s.

How many transistors does a Fuzz Face have?

two transistors
It only has two transistors, and that simplicity lends itself to making very good sounds without a lot of hassle. The Fuzz Face is the best circuit for you if you want a sustained, mellow, approachable, predictable-in-a-good-way sort of fuzz.

How do you bias transistor for a Fuzz Face?

With the fuzz all the way on (the 1K pot) set the collector of the second transistor to be at -4.5V to -5V or so by adjusting the 8.2K the same way. Listen to make sure you get it right. When biased properly, the Fuzz Face will seem to clean up and get brighter when you decrease the volume on the guitar.

How does a Fuzz Face circuit work?

The fuzz face works by inputting signal through a DC blocking resistor driving a transistor one, transistor two is directly coupled with transistor one. This is called a “voltage biasing circuit”.

What fuzz did David Gilmour?

David’s first Fuzz Face pedal used a germanium transistor (a germanium fuzz face pedal is available here: Dunlop FFM2 Germanium Fuzz Face® Mini Distortion) and switched over to a silicon transistor in the early 70s.

What does a red dot on a transistor mean?

“A red dot or other colour dot on the side of the transistor case only denotes the collector lead. A red spot elsewhere on older transistors – usually on the top – used to indicate the goodness/gain/frequency response of the device.

Is Fuzz Face distortion?

The Fuzz Face is an effects pedal for electric guitar, used also by some electric bass players. It is designed to produce a distorted sound referred to as “fuzz”, originally achieved through accident such as broken electrical components or damaged speakers.

How does the fuzz tone work?

Fuzz is a special type of distortion where harmonic overtones dominate the overall sound. A fuzz tone tends to emphasize upper frequencies and can sometimes cut away the middle frequencies. This makes a fuzz tone harder to hear in a dense band mix—but the saturation is undeniable.

Does it matter which side of the transistor the load is on?

For something simple like an LED, it does not matter which you switch. However, an active device like a Microcontroller needs its ground to be ground! So when you have a load that requires ground, you NEED to use a high-side switch.

Who invented Fuzz Face?

Ivor Arbiter
Ivor Arbiter “got the idea for the round shape when he one day saw a microphone stand with a cast iron base”. The design was originally intended to be used as a microphone base for guitarists who sang. The pedal uses two knobs, one for volume, and one for the amount of distortion the pedal produces.

Do they still make germanium transistor?

Most germanium transistor production ceased in the 1970s in favor of silicon which are more stable, consistent, have higher gain, and lower leakage.

What controls the bias of an op-amp?

The Need for Input Biasing For the op-amp to operate correctly, these inputs must be DC biased. That is, the DC bias currents (IB+ and IB-), must be able to flow into or out of the input terminals. The direction of the bias currents depends on the type of transistors.

Where do you Put Your Fuzz Face on a transistor?

A practical advice is to put your Fuzz Face first on the pedal chain, just after the guitar. The germanium transistor needs to see the inductance/impedance from the guitar pickups. If they see a buffer at the input, they tend to sound awful. In a Common Emitter transistor the voltage gain can be calculated following the equation:

What are the standard resistor values for a Fuzz Face circuit?

Without entering the mathematics that describes precisely why, apparently ,, for that standard resistor values that you’ll end up finding within the Fuzz Face circuit, many people such as the resulting seem when Q1 includes a gain of roughly 70 to 90 and Q2 an increase of roughly 120 to 140.

What is a Fuzz Face circuit?

The gist of the Fuzz Face remains in the simple circuit that uses eleven components (2 transistors, 4 resistors, 3 caps and 2 pots) and the astonishing tones created with them; delivering a soft asymmetrical clipping that changes to hard clipping in both semi-cycles under the fuzz pot action.

What is an ac128 transistor?

Besides being in the famous original Fuzz Face, the AC128 was used in numerous domestic electronic appliance, and certainly one of the most common European transistor. This explains why it is still possible to find nice new-old-stock of these jewels. They usually come in 3 different types :