DIY Guitar Pedals 7 Min Fuzz Manuel - Page 12

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2. Transistor Input and Clipping Stage.
The single input stage transistor provides the amplification of the signal while also providing some clipping and
input/output impedance to the circuit.
The Q1 transistor just needs to be high-gain (h
on the selected Q1 transistor, the less saturation and fuzz will occur and the higher the h
fuzz.
Example transistors that could be used:
Transistor
MPSA14
MPSA13
MPSA18
2N5089
2N5088
2N5210
2N3904
2N4401
of 5,000 minimum per the MPSA13 datasheet). The lower the h
FE
h
min @
V
=5.0V, I
FE
CE
10,000
5,000
500
400
300
250
150
100
value, more saturation and
FE
=1.0mA
C
www.diyguitarpedals.com.au
value
FE
11