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EA Tremolo
Many years ago, an Australian electronics magazine published a guitar tremolo
project. This tremolo has become a favorite in the DIY community for its great
sound and moderate parts count. The project presented here is based on General
Guitar Gadgets Improved EA Tremolo project. Check it out on the web:
www.generalguitargadgets.com.
beavis board project
out
C1
47nFInput
9 volts +
Output
in
A250K
DepthR11MΩ
R31MΩ
R21MΩ
Q1
2N5457
G
D
S
R410KΩ
C2
10uF
C1
220nF
Q2
2N3904
B
C
E
R5560KΩ
R6150KΩ
R84.7KΩ
R7180Ω
R91.2KΩ
C4
22uF
VR1A25K
(volume)C3
47nF
VR2A250K(depth)
G
D
S
R1168KΩ
R10120KΩ
C5
47nF
R1215KΩ
Q3
2N5088 C8
1uF
C6
1uF
R132.2MΩ C7
1uF
R1415KΩ
VR3A100K(speed)
R151KΩ
Q2
2N545747n
f
10uf+
1MΩ
1MΩ
1MΩ
2N5457
d
g
s10KΩ
220n
F
2N
3904
E
B
C
560KΩ
150KΩ
4.7KΩ
180Ω
1.2KΩ
47n
F
A100K
Volume
2N5457
d
g
s
68KΩ
120KΩ
47n
f
2N
5088
E
B
C
B
C
E
15KΩ
2.2
MΩ
1uf+
15KΩ
1uf+
1uf+
A100K
Speed
1KΩ
22uf+
revision: 1.0 ● 28 may 2008 ● © 2008 beavis audio research