Monday, June 20, 2011

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Active FM Antenna Amplifier of FM Booster


FM booster is one kind of a preamplifier which can be used to listen FM radio programs from distance FM stations clearly. The circuit comprises a common-emitter tuned RF preamplifier which tuned RF preamplifier wired around VHF/UHF transistor 2SC2570.

Serial
Parts Lists
Value
1
R1
27kΩ
2
R2
270Ω
3
R3
1kΩ
4
C1
5.6pF
5
C2
5.6pF
6
C3
1n
7
C4

8
C5
10pF
9
C6
0.1µF
10
VC1
22pF Trimmer capacitor
11
L1
1T FROM BOTTOM END
12
L2
3T, 20SWG 5mm DIA, AIR CORE
13
T1
2SC2570

Adjust input/ output trimmers (VC1/VC2) for maximum gain.

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