WORK PRINCIPLE AM RADIO RECEIVER

Competency :

Repairing of Radio Receiver

Teknologi dan Rekayasa

OBJECTIVE

Understand the working principles of a radio receiver AM (Amplitudo Modulasi)

Teknologi dan Rekayasa

Knowing of Radio AM

Information transmitted from AM radio station, the electric sound picture (taken from a microphone or other program source) is used to amplitude modulate the carrier wave emitted from the antenna and radio transmitter

Teknologi dan Rekayasa

Sistem modulasi Radio AM

Teknologi dan Rekayasa

AM radio receiver circuit

Teknologi dan Rekayasa

Blok Diagram AM Radio Receiver

RF AMP

MIX

IF AMP DETEKTOR

AUDIO

AMP

loudspeker

8

AVC

OSC

LOKAL

Teknologi dan Rekayasa

Tuner Circuit

0ut

0

+V

12V

1uF

L3

1uF

+5pFL2

D1-D2 4148

1mH

1uF

+01

005

C829

1k

4k7

47

390

39k

Radio signals through the antenna and into the mixer block + oscilator. Oscilator generating signals functioned with 455 kHz frequency is higher than the frequency of the incoming signal through the antenna

Teknologi dan Rekayasa

IF Amplifier Circuit

RANGK.IF(FREK.MENENGAH)

AVC(automaticvolume contro)

+V

12V

.1

IN60

.1

001

1S

1S1P

1P1P

1S

5k

004

.1

.1

004

+ 220/16002

+

10/16

C829

C829

100

39k5k6

470

15k

390

390

47k

AGC

Teknologi dan Rekayasa

Detektor Circuit

RANGK.DETEKTOR

TR3

ke basis TR2

+V

12V

005

.101

5k

IN60

1S1P

5K6

470

detektor

Detector circuit, described by the detector diode. IF transformer primary coils (T3) receives signals from the IF amplifier IF termodulir last

Teknologi dan Rekayasa

Rangkaian Audio Amplifier

RANGK.AUDIO AMPLIFIER

1n

0TP12

TP15

1314

TP16

TP11

+V

12v

8

+

220/16

+

1uF

+220/16

.1uf

1uF

.1uF 220pf

IN4148

5k

C1684

C1684

B698

D734

220

560

1 1

11

2k2

1k

470

150k

1k

470k

33k

Audio amplifier circuit on this plane consists of four amplifiers (TR D734) to the TR B698) and serves to strengthen the information signal from the detector circuit

Blok Diagram AM Radio

Modulasi AM

Teknologi dan Rekayasa

THE END

By. Setyo Harmadi,ST SMK Muhammadiyah 3 Yogyakarta