Rangkaian Penerima Radio Fm Sederhana

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Here is a FM radio circuit using IC7400. IC TDA7000 is a monolithic integrated circuit for mono FM portable radios, where a minimum on peripheral components is crucial. The IC TDA7000 has a Frequency-Locked-Loop system with an intermediate frequency of 70 kHz. The intermediate frequency selectivity is achieved by active RC filters. The only function which needs alignment is the resonant circuit for the oscillator, thus selecting the reception frequency. Spurious reception is avoided by means of a mute circuit, which also eliminates too noisy input signals. Special steps are taken to meet the radiation requirements

Skema Rangkaian Penerima Radio Fm

• L1 and L2 wind 5 turns of 0.6 mm enameled Copper wire on a 4 mm dia plastic former.


IC TDA7000 Description

The TDA7000 is a monolithic integrated circuit for mono FM portable radios, where a minimum on peripheral components is important (small dimensions and low costs).
The IC has an FLL (Frequency-Locked-Loop) system with an intermediate frequency of 70 kHz. The i.f. selectivity is obtained by active RC filters. The only function which needs alignment is the resonant circuit for the oscillator, thus selecting the reception frequency. Spurious reception is avoided by means of a mute circuit, which also eliminates too noisy input signals. Special precautions are taken to meet the radiation requirements.

Lay out IC TDA7000

Data IC TDA7000

Supply voltage range: 2,7 to 10 V
Supply current : 8 mA
R.F. input frequency range: 1,5 to 110 MHz
Sensitivity for -3 dB limiting
• (e.m.f. voltage)
• (source impedance: 75 Ohm mute disabled) EMF: 1,5 uV
Signal handling (e.m.f. voltage)
• (source impedance: 75 Ohm) EMF typ. 200 mV
A.F. output voltage at RL = 22 kOhm75 Mv

Supply voltage: max. 12 V
Oscillator voltage: 0,5 to VP0,5 V
Storage temperature 55 to 150 C
Operating ambient temperature 0 to 60 C.
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Rangkaian Boster Radio Penerima FM

type='html'>Boster Radio Penerima FM

Here is a simple circuit of an FM booster that can be used to listen to programmes from distant FM stations clearly. This amplifier will pull in all distant FM stations clearly. The circuit is configured as a common-emitter tuned RF pre-amplifier wired around VHF/UHF transistor Q1.

Skema rangkaian boster radio penerima FM

2SC2570. (Only C2570 is annotated on the transistor body.) Assemble the circuit on a good-quality PCB (preferably, glass-epoxy). Adjust input/ output trimmers (VC1/VC2) for maximum gain.

All capacitors are ceramic and 50V is the standard but the 25V types work fine too. Trimmer capacitors Tr1 and Tr2 (22pF) are adjusted for maximum gain. Input coil L1 consists of 4 turns of 20SWG enamelled copper wire over a 5mm diameter former. It is tapped at the first turn from the ground lead side. Coil L2 is similar to L1, but has only three turns. Pin configuration is shown in the diagram.

Component List:

• R1 = 27K
• R2 = 270 ohm
• R3 = 1K
• Tr1,Tr2 = 22pF, trimmer cap (15-40pF)
• C1,C2 = 5.6pF
• C3 = 0.001uF (1nF), ceramic
• C4,C5 = 10pF, ceramic
• C6 = 0.1uF (100nF), ceramic
• Q1 = 2SC2498, 2SC2570, 2N5179, SK9139, or NTE10. NPN VHF/UHF transistor
• L1 = 4 turns of 20SWG magnet wire, 5mm diameter. (so-called 3T+1)
• L2 = 3 turns of 20SWG magnet wire, 5mm diameter.