teknik audio
TRANSCRIPT
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Teknik AudioTeknik Audio
Oleh : DRS.YOPI SOEPRIYONOOleh : DRS.YOPI SOEPRIYONOSMK Negeri 4 JakartaSMK Negeri 4 Jakarta
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Dasar AudioDasar AudioSatuan Listrik
Satuan Ukuran untuk Besaran Simbol
Voltelectrical "pressure"
Tegangan V
Amperethe flow of electrons
Arus A, I
Watt power W, P
Ohmresistance to current flow R
Ohmimpedance, reactance
X
Farad capacitance F, C
Henry inductance H, L
Hertz frequency Hz
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Tipe Penguat (Amplifier)Tipe Penguat (Amplifier)
Penguat Tegangan (Voltage Penguat Tegangan (Voltage Amplifier)Amplifier)
Penguat Tegangan memperkuat Tegangan input biasa Penguat Tegangan memperkuat Tegangan input biasa menggunakan konfigurasi Common Base menggunakan konfigurasi Common Base
Penguat Arus ( Current Amplifier )Penguat Arus ( Current Amplifier ) Penguat Arus memperkuat Arus biasa menggunakan konfigurasi Penguat Arus memperkuat Arus biasa menggunakan konfigurasi
Common CollectorCommon Collector
Penguat Daya ( Power Amplifier )Penguat Daya ( Power Amplifier ) Kombinasi dari keduanya ,mampu memperkuat arus maupun tegangan , Kombinasi dari keduanya ,mampu memperkuat arus maupun tegangan ,
biasa menggunakan Common Emitorbiasa menggunakan Common Emitor
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Simbol dan WiringSimbol dan Wiring
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Rumus-rumus Rumus-rumus DasarDasar
Hukum Ohm :
R = V / I , V = I . R dan I = V/R
Daya :
P = V . I , P = I 2. R dan P = V2/R
Reaktansi :
Xc = 1 / (2 * π * f * C)
XL = (2 * π * f * L)
Decibell (dB) :
dB = 20 * log (V1 / V2) dB = 20 * log (I1 / I2) dB = 10 * log (P1 / P2)
Frekuansi Cuttoff :
Fc = 1 / (2 * π * R * C)
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TransistorTransistor
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Jenis transistor PowerJenis transistor Power
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Penguat TransistorPenguat Transistor
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Konfigurasi PenguatKonfigurasi Penguat
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Konfigurasi PenguatKonfigurasi Penguat
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Prategangan Transistor ( Prategangan Transistor ( Bias )Bias )
Bias Basis ( Base bias)Bias Umpan balik kolektor ( Collector Feedback Bias )Bias Pembagi Tegangan ( Voltage Devider Bias )
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Penguat FET dan Penguat FET dan MOSFETMOSFET
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Push Pull amplifierPush Pull amplifier
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Push Pull amplifier 2Push Pull amplifier 2
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Push Pull amplifier 3Push Pull amplifier 3
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LOUDSPEAKER ACTIVELOUDSPEAKER ACTIVE
TV
Tone Cantrol
VCD
Driver
Catu Daya
Amplifier
DIAGRAM BLOK
HASIL AKHIR
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SKEMA LOUDSPEAKER SKEMA LOUDSPEAKER ACTIVEACTIVE
680 pF
100n
4K7
VOLUME
BALANCE
1K
22K
1K
TREBLE
BASS
1K5
1M
2K2
10K
10K
Q1C945
10uF/25V
3n9
15n
5K6
1K
1000 uF/25 V 100n
1uF/25V
1uF/25V
470
10uF/25V
220n
1 Ohm
100n
1 Ohm
100n22n
22n
2200uF/25V
TD
A 2
00
4IC 1
1
5
7
9
11
8
10
24
6
DC12 V - 15 V
LS
+
-
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Rancangan BOX dan Rancangan BOX dan PanelPanel
20 Cm
8 cm
POWER
VOL BAL TREBLE BASSLOUDNES
HiFi 80 W ACTIVE SPEAKER
50 cm
24 cm
26 c
m
Ø 2,5”
Ø 5 cm
Ø 6 “
8 cm
20 cm
8 cm
19,3
cm
10,7
cm
PANEL CONTROL
PANEL CONTROL
GAMBAR RANCANGAN BOX
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Power ampli 60 WattPower ampli 60 Watt
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20 Watt Power Amp20 Watt Power Amp
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Catu daya simetrisCatu daya simetris
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Gambar rangkaian dan Gambar rangkaian dan ICnyaICnya
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50 watt power amplifier50 watt power amplifier
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Ic lm 3876Ic lm 3876
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OTL 40 Watt Power AmpOTL 40 Watt Power Amp
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Catu daya non simetrisCatu daya non simetrisuntuk OTL power amplifieruntuk OTL power amplifier
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OCL 50 wattOCL 50 watt
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Pcb layoutPcb layout
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OTL 35 WattOTL 35 Watt
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PA GitarPA Gitar
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Power Ampli TDA 2005Power Ampli TDA 2005
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Stereo HIFI MungilStereo HIFI Mungil
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Pre-AmpPre-Amp
Preamp Head Tape Pick Up Mic Aux1
X C:500 pF R:47 k R:47 k R:47 k
R1 810 1k 1 k 1 k
R2 12 k 560 k Hub. Singkat Hub. Singkat
R3 330 k 56 k 100 k 10 k
C2 22 uF 47 uF 47 k 47 uF
C3 - 6,8 nF - -
C4 10 nF 1,5 nF 100 pF -
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Tone ControlTone Control
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Power Amplifier Power Amplifier TA7230ATA7230A
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Power AmplifierPower Amplifier
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Pre Amp HeadPre Amp Head
Daftar Komponen R1 = R5 = 56k C2 = C6 = 1,5nF R2 = R6 = 2,2M C3 = C7 = 22uF/10V R3 = R7 = 270 ohm C4 = C8 = 1uF/25V R4 = R8 = 330k C9 = C10 = 4,7uF/25V R9 = R10 = 100k IC = LM387
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Catu DayaCatu Daya
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Catu Daya VariableCatu Daya Variable
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Preamp GitarPreamp Gitar
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Pemasangan HeatsinkPemasangan Heatsink
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Pemasangan HeatsinkPemasangan Heatsink
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Penguat Operasional (Op-Amp)Penguat Operasional (Op-Amp)
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Jenis Konfigurasi Pin :
Non-Inverting Amplifier :
Single Op-AmpDual Op-AmpQuad Op-Amp
Inverting Amplifier :
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Penguat Op-AmpPenguat Op-Amp
Av = (Rfb1 + Rfb2) / Rfb2 Av = Rfb / RinX
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Buffer AmplifierBuffer Amplifier
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Balaxandall Tone ControlBalaxandall Tone Control
Fb0 = 1 / (2 * π * C * Rv) ... where C is the cap across the pot, and Rv is the pot valueFb1 = 1 / (2 * π * C * Rs) ... where C is the cap, and Rs is the series resistance to the potThese give (again, respectively) ... Fb0 = 1 / (2 * π * 47nF * 100k) = 33 HzFb1 = 1 / (2 * π * 47nF * 22k) = 154 HzThe treble is a little trickier, since there is an interaction with the bass control due to the bass feed resistance from the bass pot wiper. In theory the frequency is determined by Ft = 1 / ( 2 * π * C * Rb)
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Gyrator ( Simulator L)Gyrator ( Simulator L)L = C1 * R1 * (R2 - R1)
F = 1 / (2 * π * √(LC)) Hz
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Schmitt Trigger OscilatorSchmitt Trigger Oscilator
X = R3 / (R2 + R3) Fo = 1 / (2 * R1 * C1 * loge ((1 + X) / (1 - X))
Frekuensi Untuk rangkaian Oscilator di atas adalah :
X = 100 / 200 = 0.5 Fo = 1 / (2 * 100k * 10nF * loge (1.5 / 0.5)) Fo = 1 / (0.002 * loge (3)) Fo = 455 Hz
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Phase Shift OscilatorPhase Shift Oscilator
Fo = √ 6 / (2 * π * C * R)