Pocket Radio Using LA4510

Here is a circuit for a pocket radio using one IC LA4510 and three transistors. This circuit differs from ordinary circuits at the audio stage only. Here a small 9-pin IC LA4510 is used. It replaces three transistors, a driver transformer, and many other passive components. The amplifier circuit needs only one resistor! At zero signal level, this circuit draws 8-10 mA current only. With a 3-volt supply, this circuit can give 200 mW output power.

For making this radio you may buy an ordinary pocket radio PCB and assemble IF and RF sections. LA4510 amp circuit may be assembled on a small separate Veroboard which may be fixed on the PCB using adhesive. Otherwise, you may make a new single PCB for this circuit. The 1.5-volt pen torch cells can be used to power the circuit.

circuit diagram of pocket radio using LA4510

Parts List of Pocket Radio Using LA4510

Resistor (all ¼-watt, ± 5% Carbon)

R1 = 680 Ω

R2 = 220 KΩ

R3 = 68 KΩ

R4 = 100 KΩ

R5 = 560 Ω

R6 = 82 Ω

R7 = 33 KΩ

R8 = 47 Ω

VR1= 10 KΩ LOG.

Capacitors

C1 = 2J GANG

C2, C3 = TRIMMER 39 pF

C4, C5, C11, C12 = 0.01 µF

C6, C8, C10 = 2700 pF

C7 = 2.2 µF/10V

C9 = 0.04 µF

C13, C14 = 220 µF/16V

C15 = 1 µF/10V

C16, C21 = 47 µF/10V

C17 = 22 µF/10V

C18 = 0.001 µF

C19 = 0.0015 µF

C20 = 470 µF/10V

Semiconductors

IC1 = LA5410

T1 = BF194B

T2 = BF195C

T3 = BF195D

D1 = 1N34 or OA79

Miscellaneous

X1 = YELLOW IFT MIXTURE

X2 = GREEN IFT INTERSTAGE

X3 = WHITE IFT DETECTOR

L1 = 2*MW ANTENNA COIL OVER FERRITE ROD

L2 = (RED) MW OSCILLATOR COIL (IFT TYPE)

LS1 = 8Ω

SW1 = On/Off Switch

 

One Thought to “Pocket Radio Using LA4510”

  1. vishal yadav

    what about 1895 BEL 5AA

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