EA Tremolo - beavis audiobeavisaudio.com/beavisboard/projects/bbp_EATremolo.pdf · 2019. 1. 3. ·...

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a b c d e f g h i j

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