red llama - audio researchbeavisaudio.com/beavisboard/projects/bbp_redllama.pdf · 2019. 1. 3. ·...

+ - + - + - + - a b c d e f g h i j 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 25 26 27 28 24 29 30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 25 26 27 28 24 29 30 a b c d e f g h i j in out Red Llama This is the Way Huge clone of Craig Anderton's original Tube Sound Overdrive. Use a CMOS chip to generate great overdrive sounds. In fact, the Way Huge version differs only marginally. A couple of things of interest in this schematic. First off, R1, D1, and C1 are not part of the circuit’s sound at all: R1 and C1 filter the power supply to remove noisy if you are using a cheap AC adaptor, and D1 is a reverse-polarity protection diode to protect the 4049 chip in case you plug in an AC adaptor with the wrong polarity. This is a very common arrangement in stompboxes regardless of origin. Also, at first glance the schematic appears to show five separate integrated circuits. In actuality, there is only one, the five shown are schematic “shorthand” a way of clearly showing that the IC is actually made up of multiple stages. CD4049 UBE 68nf 1MΩ 51pf Mods! Want to build the circuit to Craig Anderton's original Tube Sound Fuzz specifications? Replace C2 with a 100nf part, C3 with a 10pf part, C4 with a 47nf part, and C5 with a 10pf part. See if you can hear the difference. I couldn't. Voltage Sag! Audio circuits based on this chip can get squishy and compressed when you lower the voltage. Try turning down the voltage a bit on the i/o breakout box to experiment. beavis board project 100KΩ 1KΩ B1M Gain 33nf 100pf 1MΩ 10uf + A10K Volume Note: D1 and C1 are omitted from the breadboard layout because they are filtering components for noisy power supplies. You can add them on, but they don’t really do anything for a battery powered circuit. 9 volts + 14 15 U1a CD4049 C2 68nf Input R3 1MΩ R2 100KΩ R5 1MΩ C3 51pF Output VR1 B1M (Gain) 9 10 U1b CD4049 C4 33nf C5 100pF C6 10uf VR2 A10K (Volume) R1 1KΩ C1 100uf D1 1N4001 5 U1c CD4049 1 3 U1e CD4049 11 U1f CD4049 8 7 U1d CD4049 R4 100KΩ 100KΩ revision: 1.0 ● 28 may 2008 ● © 2008 beavis audio research

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in

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Red Llama

This is the Way Huge clone of Craig Anderton's original Tube Sound Overdrive. Use a

CMOS chip to generate great overdrive sounds. In fact, the Way Huge version differs

only marginally. A couple of things of interest in this schematic. First off, R1, D1, and C1

are not part of the circuit’s sound at all: R1 and C1 filter the power supply to remove

noisy if you are using a cheap AC adaptor, and D1 is a reverse-polarity protection diode

to protect the 4049 chip in case you plug in an AC adaptor with the wrong polarity. This

is a very common arrangement in stompboxes regardless of origin. Also, at first glance

the schematic appears to show five separate integrated circuits. In actuality, there is

only one, the five shown are schematic “shorthand” a way of clearly showing that the IC

is actually made up of multiple stages.

CD4049

UBE

68nf

1MΩ

51pf

Mods!Want to build the circuit to Craig Anderton's original Tube Sound Fuzz

specifications? Replace C2 with a 100nf part, C3 with a 10pf part, C4 with a 47nf

part, and C5 with a 10pf part. See if you can hear the difference. I couldn't.

Voltage Sag! Audio circuits based on this chip can get squishy and compressed

when you lower the voltage. Try turning down the voltage a bit on the i/o breakout

box to experiment.beavis board project

100KΩ

1KΩ

B1M

Gain

33nf

100pf

1MΩ

10uf

+

A10K

Volume

Note: D1 and C1 are omitted from the breadboard

layout because they are filtering components for noisy

power supplies. You can add them on, but they don’t

really do anything for a battery powered circuit.

9 volts +

14 15

U1aCD4049

C2

68nfInput

R31MΩ

R2100KΩ

R51MΩ

C3

51pF

Output

VR1

B1M

(Gain)

9 10

U1bCD4049

C4

33nf

C5

100pF

C6

10ufVR2

A10K

(Volume)

R11KΩ

C1

100uf

D1

1N4001

5

U1cCD4049

1

3

U1eCD4049

11

U1fCD4049

8

7

U1dCD4049

R4100KΩ

100KΩ

revision: 1.0 ● 28 may 2008 ● © 2008 beavis audio research