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BETA PREAMP

4

PARTS LIST, CONT.

PART VALUE

TYPE 

NOTES

R31

3k3

Metal film resistor, 1/4W

R32

220k

Metal film resistor, 1/4W

R33

150R

Metal film resistor, 1/4W

R34

100R

Metal film resistor, 1/4W

RPD

2M2

Metal film resistor, 1/4W

Input pulldown resistor. Can be as low as 1M.

LEDR

4k7

Metal film resistor, 1/4W

LED current-limiting resistor. Adjust value to change LED brightness.

C1

200pF

MLCC capacitor, NP0/C0G

Can also use 220pF.

C2

2.2uF

Film capacitor, 7.2 x 5mm

C3

33pF

MLCC capacitor, NP0/C0G

C4

2.2uF

Film capacitor, 7.2 x 5mm

C5

5pF

MLCC capacitor, NP0/C0G

C6

47n

Film capacitor, 7.2 x 2.5mm

C7

2n2

Film capacitor, 7.2 x 2.5mm

C8

82pF

MLCC capacitor, NP0/C0G

C9

2.2uF

Film capacitor, 7.2 x 5mm

C10

2.2uF

Film capacitor, 7.2 x 5mm

C11

10uF

Electrolytic capacitor, 5mm

C12

33pF

MLCC capacitor, NP0/C0G

C13

2.2uF

Film capacitor, 7.2 x 5mm

C14

22n

Film capacitor, 7.2 x 2.5mm

Lead value. Use 56n for Bass version.

C15

100n

Film capacitor, 7.2 x 2.5mm

C16

10n

Film capacitor, 7.2 x 2.5mm

C17

10n

Film capacitor, 7.2 x 2.5mm

C18

4n7

Film capacitor, 7.2 x 2.5mm

Lead value. Use 10n for Bass version.

C19

27n

Film capacitor, 7.2 x 2.5mm

Lead value. Use 47n for Bass version.

C20

2.2uF

Film capacitor, 7.2 x 5mm

C21

10uF

Electrolytic capacitor, 5mm

C22

10uF

Electrolytic capacitor, 5mm

C23

100n

MLCC capacitor, X7R

C24

100n

MLCC capacitor, X7R

C25

100n

MLCC capacitor, X7R

C26

100n

MLCC capacitor, X7R

C27

100n

MLCC capacitor, X7R

C28

100n

MLCC capacitor, X7R

C29

100uF

Electrolytic capacitor, 6.3mm

Содержание BETA PREAMP

Страница 1: ...Sunn Beta Lead Bass A single channel pedal recreation of the Sunn Beta Lead and Beta Bass amplifiers unique in using overdriven CMOS stages for their drive tone Preamp high gain drive 1 0 1 2022 06 06...

Страница 2: ...e original amplifier It can be built in either Bass or Lead configurations by swapping out a few components While it can be used as a drive pedal it works best as a true preamp driving a power amp dir...

Страница 3: ...k Metal film resistor 1 4W R11 68k Metal film resistor 1 4W R12 22k Metal film resistor 1 4W R13 68k Metal film resistor 1 4W R14 10k Metal film resistor 1 4W R15 100k Metal film resistor 1 4W R16 100...

Страница 4: ...C capacitor NP0 C0G C9 2 2uF Film capacitor 7 2 x 5mm C10 2 2uF Film capacitor 7 2 x 5mm C11 10uF Electrolytic capacitor 5mm C12 33pF MLCC capacitor NP0 C0G C13 2 2uF Film capacitor 7 2 x 5mm C14 22n...

Страница 5: ...use 1N4001 IC1 RC4558P Operational amplifier DIP8 IC1 S DIP 8 socket IC socket DIP 8 IC2 CD4069UBE CMOS hex inverter 6 circuit DIP14 IC2 S DIP14 socket IC socket DIP 14 IC3 RC4558P Operational amplifi...

Страница 6: ...2 1mm DC jack 2 1mm panel mount Mouser 163 4302 E or equivalent IN 1 4 mono 1 4 phone jack closed frame Switchcraft 111X or equivalent OUT 1 4 mono 1 4 phone jack closed frame Switchcraft 111X or equ...

Страница 7: ...s which is a trick mentioned in the owner s manual of the original amplifier that is accomplished by patching the preamp output of A into the input of B Enclosure size This project was designed for th...

Страница 8: ...0n GND 12k GND 22k 100k GND 4k7 91k 10n VA VA 100n 100n GND 100n 100n GND 12k 8k2 12k 10n GND GND GND 4n7 GND 3k3 GND 27n VA 100n 100n GND GND VA 220k 1N458A 1N458A VA VA 150R 2u2 10uF 10uF 220uF GND...

Страница 9: ...s by measuring the scale on the printed page LED hole drill size assumes the use of a 5mm LED bezel available from several parts suppliers Adjust size accordingly if using something different such as...

Страница 10: ...BETA PREAMP 10 ENCLOSURE LAYOUT Enclosure is shown without jacks See next page for jack layout and wiring 1590BBS...

Страница 11: ...BETA PREAMP 11 WIRING DIAGRAM IN V GND PGND NC OUT PCB IN GND V V JACK GND JACK OUT IN GND GND PCB OUT...

Страница 12: ...of others Projects may be used for commercial endeavors in any quantity unless specifically noted No attribution is necessary though a link back is always greatly appreciated The only usage restricti...

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