and a high gain in the second stage (β=110-130 approx. The Fuzz Face is a distortion guitar pedal designed in London by Arbitrer Electronics Ltd in the autumn of 1966. .MODEL GERPNP_LOWGAIN PNP(IS=85.8N BF=85.000 NF=1.000 VAF=102.207 .MODEL GERPNP_HIGHGAIN PNP(IS=120.8N BF=120.000 NF=1.000 VAF=102.207 \[\\r_{\pi } = \frac{(\beta +1)\cdot Vt}{I_{EQ}}=\frac{(\beta +1)}{gm}= \frac{(70+1)}{0.0088}= 8K\]\[A_{V}=-g_{m}\cdot R_{C}= -g_{m}\cdot R_{1}= 0.0088 \cdot 33K = 290\: (49dB)\]\[g_{m}=\frac{I_{e}}{V_{T}}= \frac{0.22mA}{25mV}= 0.0088\]\[fc=\frac{1}{2\pi R C}=\frac{1}{2\pi \cdot Z_{in}\cdot  C_{1}}=\frac{1}{2\pi \cdot 5K \cdot 2.2uF}= 14Hz\]\[fc=\frac{1}{2\pi R C}=\frac{1}{2\pi \cdot R_{vol}\cdot  C_{3}}=\frac{1}{2\pi \cdot 500K \cdot 0.01uF}= 31Hz\]\[A_{V}=\frac{R_{C}}{R_{E}}= \frac{R_{2}+R_{3}}{R_{pot1}}\]\[f_{c}=\frac{1}{2\pi R C}=\frac{1}{2\pi \cdot R_{pot1}\cdot  C_{2}}=\frac{1}{2\pi \cdot 1K \cdot 20uF}= 7.9Hz\]\[f_{c}=\frac{1}{2\pi R C}=\frac{1}{2\pi \cdot Z_{in}\cdot  C_{1}}=\frac{1}{2\pi \cdot 5K \cdot 2.2uF}= 14Hz\]\[f_{c}=\frac{1}{2\pi R C}=\frac{1}{2\pi \cdot R_{vol}\cdot  C_{3}}=\frac{1}{2\pi \cdot 500K \cdot 0.01uF}= 31Hz\]The Fuzz Face is a distortion guitar pedal designed in London by Arbitrer Electronics Ltd in the autumn of 1966. It produces a characteristic high distorted sound called Ivor Arbiter took the round shaped enclosure idea from a microphone stand and it was the first pedal including a DPDT stomp-switch. The 1K linear "Fuzz" pot that was standard issue for the original Fuzz Face. This gain variation is crucial in the design, the best match uses a low gain in the first stage (β=70-80 approx.) It enjoys the most enduring reputation probably due to Jimi Hendrix use and abuse of this pedal. They were manufactured back in the old USSR Soviet days, they are under military specifications that make them good, with a consistent gain and not leaky in current.Other 1966 Original Electronic Components Peculiarities: The parts used back in the 60s keep part of the character of the pedal, these are the most important facts: The original FF uses standard aluminum electrolytic capacitors for the 2.2uF and 20uF values and a film for the 10nF cap. The Fuzz Face Caps: The original FF uses standard aluminum electrolytic capacitors for the 2.2uF and 20uF values and a film for the 10nF cap. It is not the ideal input stage for signal integrity but the best for simplicity and fast high gain.Is equal to the input impedance of a common emitter stage.

It might look funny but It has a reason: the output signal is not much larger than the input signal to keep the huge amount of signal available from over-driving the input of the pedal or amplifier following it. ).However, there are some other options, for a more compressed sound you can use β=90-120 for QThe circuit is a simple 2 stage amplifier with a feedback network path. Use a cutter to separate the stickers and place the black pad on the bottom: Place the 2 plastic insulators (one need to be cut following the stencil) using double side tape, they will protect the electronics: Title: Germanium-Fuzz-Face … This caps will limit the high-frequency response of the pedal and keep under control the hissing noise.It is crucial to select the right transistors in order to archive the best sounding box. Time Manipulator - Arduino Delay/Echo/Reverb This email address is being protected from spambots. The project is designed to be fitted in a metal enclosure (Hammond 1590BBS) for better protection. The original models use 1/2W carbon film resistors.

This Fuzz Face make use of the BC109C transistors which offers a sweet organic sound unlike many of the modern pedals of today. You need JavaScript enabled to view it. Many people think that original carbon resistors carry part of the organic fuzz distortion sound. We have created simple manuals to build this project:We also have a YouTube video that guides you during the whole building process:(you can also order NOS USSR Germanium Transistors)The logical thinking is that maxing the guitar volume knob and the pedal Fuzz and Vol controls will give the maximum distortion, BUT the Fuzz pedal is quite unique and the volume knob of the guitar plays a very important role in this effects. This potentiometer put almost all the The original PCB from the 60s uses a single layer printed circuit board, will all the components placed on one side while the tracks run over the bottom. This is due to the CThe graph also shows a general roll off of the bass harmonics under 14Hz, this is due to the high pass filter created by CBroadly speaking the frequency response of the Fuzz Face is not very innovative, it just removes some bass and keeps all the highs which contribute to have powerful distortion.

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