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Ditulis Oleh : YK69 Elektro
Judul : Rangkaian Boster Radio Penerima FM

Rangkaian Boster Radio Penerima FM

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.

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