Scrambler

effect pedal project by Ampeg

Here's the Scrambler effect pedal project from Ampeg.

This project has been described using terms like fuzz, stripboard, and vero and is reportedly verified, meaning many hobbyists have already completed this project and verify that the instructions are without issue.

Beyond the specs and details found on this page, you'll want to check out these stripboard resources too.

Project Resources

Parts List

  • C1
    100u
  • C2
    10n
  • C3
    4u7
  • C4
    1u
  • C5
    1u
  • C6
    4u7
  • C7
    4u7
  • C8
    100u
  • C9
    100p
  • D1
    1N4148
  • D1 (Alt)
    1N914
  • D2
    1N4148
  • D2 (Alt)
    1N914
  • D3
    1N4148
  • D3 (Alt)
    1N914
  • D4
    1N4148
  • D4 (Alt)
    1N914
  • D5
    1N4148
  • D5 (Alt)
    1N914
  • P1
    10k Texture
  • P2
    50k Blend
  • P3
    50k Volume
  • R1
    220k
  • R2
    47k
  • R3
    220k
  • R4
    4M7
  • R5
    4M7
  • R6
    1M
  • R7
    4k7
  • R8
    1M
  • R9
    4k7
  • R10
    8k2
  • R11
    4k7
  • R12
    2k2
  • R13
    47k
  • R14
    1k
  • R15
    470k
  • R16
    220R
  • T1
    2N5306
  • T1 (Alt)
    BC517
  • T1 (Alt)
    MPSA14
  • T1 (Alt)
    NPN_DARLINGTON generic
  • T2
    2N5306
  • T2 (Alt)
    BC517
  • T2 (Alt)
    MPSA14
  • T2 (Alt)
    NPN_DARLINGTON generic
  • T3
    2N5306
  • T3 (Alt)
    BC517
  • T3 (Alt)
    MPSA14
  • T3 (Alt)
    NPN_DARLINGTON generic
  • T4
    BC169B
  • T4 (Alt)
    2N5088
  • U1
    9V

Similar transistors & Potential Alternatives

Can't find an exact match for the recommended transistors in this project within your stash? Or maybe you just feel like experimenting. Use these tables below to get started finding a suitable or otherwise interesting transistor substitution.

There may be 6 alternatives for the 2N5306 mentioned above in the parts list for this project. These suggestions were derived by considering the original component's hFE, Pol, Ic, Vcb, and Vce values and finding comparables in our database. These alternatives are suggestions for further exploration (fun!) and have not been tested in the context of this project. You can also to suit your preferences.

2N5306
more info
Cc
10
pF
ft
60
MHz
hFE
7000
β
Ic
0.3
A
Pc
0.4
W
Pol
NPN
Tj
125
°C
TranMat
Si
Vcb
25
V
Vce
25
V
Veb
12
V
2N5306A
more info
Cc
10
pF
ft
60
MHz
hFE
7000
β
Ic
0.3
A
Pc
0.4
W
Pol
NPN
Tj
125
°C
TranMat
Si
Vcb
25
V
Vce
25
V
Veb
12
V
GET5306A
more info
Cc
10
pF
ft
60
MHz
hFE
7000
β
Ic
0.3
A
Pc
0.4
W
Pol
NPN
Tj
125
°C
TranMat
Si
Vcb
25
V
Vce
25
V
Veb
12
V
HS5306
more info
Cc
10
pF
ft
60
MHz
hFE
7000
β
Ic
0.3
A
Pc
0.4
W
Pol
NPN
Tj
125
°C
TranMat
Si
Vcb
25
V
Vce
25
V
Veb
12
V
HS5306A
more info
Cc
10
pF
ft
60
MHz
hFE
7000
β
Ic
0.3
A
Pc
0.4
W
Pol
NPN
Tj
125
°C
TranMat
Si
Vcb
25
V
Vce
25
V
Veb
12
V
MPS5306
more info
Cc
10
pF
ft
60
MHz
hFE
7000
β
Ic
0.3
A
Pc
0.4
W
Pol
NPN
TranMat
Si
Vcb
25
V
Vce
25
V
Veb
12
V

There may be 5 alternatives for the BC517 mentioned above in the parts list for this project. These suggestions were derived by considering the original component's hFE, Pol, Ic, Vcb, and Vce values and finding comparables in our database. These alternatives are suggestions for further exploration (fun!) and have not been tested in the context of this project. You can also to suit your preferences.

BC517
more info
Cc
5
pF
ft
120
MHz
hFE
30000
β
Ic
0.4
A
Pc
0.625
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
40
V
Vce
30
V
Veb
10
V
BC517G
more info
ft
200
MHz
hFE
30000
β
Ic
1
A
Pc
1.5
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
40
V
Vce
30
V
Veb
10
V
BC517P
more info
Cc
5
pF
ft
120
MHz
hFE
30000
β
Ic
0.4
A
Pc
0.625
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
40
V
Vce
30
V
Veb
10
V
HBC517
more info
Cc
5
pF
ft
220
MHz
hFE
30000
β
Ic
0.5
A
Pc
0.625
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
40
V
Vce
30
V
Veb
10
V
MMBTA517
more info
Cc
5
pF
ft
220
MHz
hFE
30000
β
Ic
0.4
A
Pc
0.35
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
40
V
Vce
30
V
Veb
10
V

There may be 11 alternatives for the MPSA14 mentioned above in the parts list for this project. These suggestions were derived by considering the original component's hFE, Pol, Ic, Vcb, and Vce values and finding comparables in our database. These alternatives are suggestions for further exploration (fun!) and have not been tested in the context of this project. You can also to suit your preferences.

MPSA14
more info
Cc
10
pF
ft
125
MHz
hFE
10
β
Ic
0.3
A
Pc
0.31
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
30
V
Vce
30
V
Veb
10
V
2N102
more info
ft
0.4
MHz
hFE
10
β
Ic
1.5
A
Pc
1
W
Pol
NPN
Tj
75
°C
TranMat
Ge
Vcb
30
V
Vce
30
V
Veb
15
V
2N102-13
more info
ft
0.4
MHz
hFE
10
β
Ic
1.5
A
Pc
1
W
Pol
NPN
Tj
75
°C
TranMat
Ge
Vcb
30
V
Vce
30
V
Veb
15
V
2N1016
more info
ft
0.5
MHz
hFE
10
β
Ic
7.5
A
Pc
150
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
30
V
Vce
30
V
Veb
25
V
2SC2298B
more info
hFE
10
β
Ic
1
A
Pc
8
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
30
V
Vce
30
V
Veb
10
V
F101
more info
ft
1
MHz
hFE
10
β
Ic
4
A
Pc
85
W
Pol
NPN
Tj
175
°C
TranMat
Si
Vcb
30
V
Vce
30
V
F104
more info
ft
1
MHz
hFE
10
β
Ic
4
A
Pc
75
W
Pol
NPN
Tj
175
°C
TranMat
Si
Vcb
30
V
Vce
30
V
F107
more info
ft
1.5
MHz
hFE
10
β
Ic
4
A
Pc
85
W
Pol
NPN
Tj
140
°C
TranMat
Si
Vcb
30
V
Vce
30
V
KT603A
more info
Cc
15
pF
ft
200
MHz
hFE
10
β
Ic
0.3
A
Pc
0.5
W
Pol
NPN
Tj
175
°C
TranMat
Si
Vcb
30
V
Vce
30
V
Veb
3
V
MRF401
more info
Cc
65
pF
hFE
10
β
Ic
3.3
A
Pc
50
W
Pol
NPN
Tj
175
°C
TranMat
Si
Vcb
30
V
Vce
30
V
Veb
4
V
TPSA13
more info
ft
125
MHz
hFE
10
β
Ic
0.4
A
Pc
0.625
W
Pol
NPN
Tj
125
°C
TranMat
Si
Vcb
30
V
Vce
30
V

There may be 17 alternatives for the BC169B mentioned above in the parts list for this project. These suggestions were derived by considering the original component's hFE, Pol, Ic, Vcb, and Vce values and finding comparables in our database. These alternatives are suggestions for further exploration (fun!) and have not been tested in the context of this project. You can also to suit your preferences.

BC169B
more info
Cc
5
pF
ft
85
MHz
hFE
240
β
Ic
0.1
A
Pc
0.3
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
5
V
BC169
more info
Cc
5
pF
ft
85
MHz
hFE
240
β
Ic
0.1
A
Pc
0.3
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
5
V
BC208B
more info
Cc
5
pF
ft
150
MHz
hFE
240
β
Ic
0.1
A
Pc
0.3
W
Pol
NPN
Tj
125
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
5
V
BC270B
more info
Cc
12
pF
ft
150
MHz
hFE
240
β
Ic
1
A
Pc
0.375
W
Pol
NPN
Tj
175
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
6
V
BC279
more info
Cc
7
pF
ft
75
MHz
hFE
240
β
Ic
0.1
A
Pc
0.3
W
Pol
NPN
Tj
125
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
6
V
BC279B
more info
Cc
7
pF
ft
75
MHz
hFE
240
β
Ic
0.1
A
Pc
0.3
W
Pol
NPN
Tj
125
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
6
V
BCAP08B
more info
Cc
6
pF
ft
150
MHz
hFE
240
β
Ic
0.1
A
Pc
0.3
W
Pol
NPN
Tj
175
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
5
V
BCAP09B
more info
Cc
6
pF
ft
150
MHz
hFE
240
β
Ic
0.1
A
Pc
0.3
W
Pol
NPN
Tj
175
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
5
V
CIL513
more info
Cc
6
pF
ft
100
MHz
hFE
250
β
Ic
0.2
A
Pc
0.2
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
10
V
KC149
more info
Cc
4.5
pF
ft
150
MHz
hFE
240
β
Ic
0.1
A
Pc
0.2
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
5
V
KC509
more info
Cc
4.5
pF
ft
175
MHz
hFE
240
β
Ic
0.1
A
Pc
0.3
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
5
V
MP8135
more info
hFE
250
β
Ic
1.2
A
Pc
3
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
5
V
MP8235
more info
ft
100
MHz
hFE
250
β
Ic
1.2
A
Pc
5
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
4
V
NSS20501UW3T2G
more info
Cc
70
pF
ft
150
MHz
hFE
250
β
Ic
5
A
Pc
1.5
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
6
V
NSS20501UW3TBG
more info
Cc
70
pF
ft
150
MHz
hFE
250
β
Ic
5
A
Pc
1.5
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
6
V
PBSS4021NZ
more info
Cc
110
pF
ft
95
MHz
hFE
250
β
Ic
8
A
Pc
2.6
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
5
V
PBSS4220PANS
more info
Cc
13.5
pF
ft
120
MHz
hFE
250
β
Ic
2
A
Pc
0.37
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
20
V
Vce
20
V
Veb
7
V

There may be 16 alternatives for the 2N5088 mentioned above in the parts list for this project. These suggestions were derived by considering the original component's hFE, Pol, Ic, Vcb, and Vce values and finding comparables in our database. These alternatives are suggestions for further exploration (fun!) and have not been tested in the context of this project. You can also to suit your preferences.

2N5088
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.31
W
Pol
NPN
Tj
135
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
3
V
2N5088G
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.625
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
3
V
3DG5088
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.1
A
Pc
0.625
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4.5
V
CMBT5088
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.225
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4.5
V
CMKT5088
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.35
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4.5
V
CMST5088
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.275
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4.5
V
ED1402D
more info
hFE
290
β
Ic
0.05
A
Pc
0.6
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4
V
FMMT5088
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.31
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
3
V
GES5088
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.31
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
3
V
KMBT5088
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.1
A
Pc
0.35
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4.5
V
KST5088
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.35
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4.5
V
MMBT5088
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.3
W
Pol
NPN
Tj
125
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4
V
MMBT5088LT1G
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.225
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4.5
V
NSVMMBT5088LT3G
more info
Cc
4
pF
ft
50
MHz
hFE
300
β
Ic
0.05
A
Pc
0.23
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4.5
V
PMST5088
more info
Cc
4
pF
ft
100
MHz
hFE
300
β
Ic
0.1
A
Pc
0.2
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V
Veb
4.5
V
TMPT5088
more info
Cc
4
pF
hFE
300
β
Ic
0.2
A
Pc
0.225
W
Pol
NPN
Tj
150
°C
TranMat
Si
Vcb
35
V
Vce
30
V