Amplificador grave

dio_unded2 · 11 de outubro de 2008

eu gostaria de montar um amplificador de grave, só grave

por favor podem me mandar o esquema , eu gostaria de um de 60 watts ou mais por favor se alguem tiver o esquema de um destes mandem pra mim

agradeço desde ja

cabteixeira · 12 de outubro de 2008

Uma sugestão de amplificador, retirada de http://www.electronics-lab.com/projects/audio/032/:

Lista de material:

[B]Amplifier parts:[/B]

[LEFT] R1__________________6K8 1W Resistor
R2,R4_____________470R 1/4W Resistors
R3__________________2K 1/2W Trimmer Cermet
R5,R6_______________4K7 1/2W Resistors
R7________________220R 1/2W Resistor
R8__________________2K2 1/2W Resistor
R9_________________50K 1/2W Trimmer Cermet
R10________________68K 1/4W Resistor
R11,R12______________R47 4W Wirewound Resistors

C1,C2,C4,C5________47΅F 63V Electrolytic Capacitors
C3________________100΅F 25V Electrolytic Capacitor
C6_________________33pF 63V Ceramic Capacitor
C7_______________1000΅F 50V Electrolytic Capacitor
C8_______________2200΅F 63V Electrolytic Capacitor (See Notes)

D1_________________LED Any type and color
D2________Diode bridge 200V 6A

Q1,Q2____________BD139 80V 1.5A NPN Transistors
Q3_____________MJ11016 120V 30A NPN Darlington Transistor (See Notes)
Q4_____________MJ11015 120V 30A PNP Darlington Transistor (See Notes)

SW1_______________SPST Mains switch

F1__________________4A Fuse with socket

T1________________220V Primary, 48-50V Secondary 75 to 150VA Mains transformer

PL1_______________Male Mains plug

SPKR______________One or more speakers wired in series or in parallel
Total resulting impedance: 8 or 4 Ohm
Minimum power handling: 75W
[/LEFT]

Um pré-amplificador:

Lista de material:

[B]Preamplifier  parts:[/B]

[LEFT] P1_________________10K Linear Potentiometer
P2_________________10K Log. Potentiometer

R1,R2______________68K 1/4W Resistors
R3________________680K 1/4W Resistor
R4________________220K 1/4W Resistor
R5_________________33K 1/4W Resistor
R6__________________2K2 1/4W Resistor
R7__________________5K6 1/4W Resistor
R8,R18____________330R 1/4W Resistors
R9_________________47K 1/4W Resistor
R10________________18K 1/4W Resistor
R11_________________4K7 1/4W Resistor
R12_________________1K 1/4W Resistor
R13_________________1K5 1/4W Resistor
R14,R15,R16_______100K 1/4W Resistors
R17________________10K 1/4W Resistor

C1,C4,C8,C9,C10____10΅F 63V Electrolytic Capacitors
C2_________________47΅F 63V Electrolytic Capacitor
C3_________________47pF 63V Ceramic Capacitor
C5________________220nF 63V Polyester Capacitor
C6________________470nF 63V Polyester Capacitor
C7________________100nF 63V Polyester Capacitor
C11_______________220΅F 63V Electrolytic Capacitor

Q1,Q3____________BC546 65V 100mA NPN Transistors
Q2_______________BC556 65V 100mA PNP Transistor

J1,J2___________6.3mm. Mono Jack sockets

SW1_______________SPST Switch
[/LEFT]

[LEFT]
[/LEFT]

Só uma dica, que vale pro pessoal...

Muita coisa pode ser achada no google mesmo... Este esquema eu achei, pesquisando em imagens. A dica é tentar pesquisar em português e caso nada de bom seja achado, pesquisar em inglês (no teu caso, eu pesquisei por "bass amplifier")