This is the RF amplifier for VHF/FM range frequency of 87.5- 108 MHz. The circuit built using power transistor MOSFET BLF245.
The achievement of this 30W RF amplifier was designed to take place on a heatsink microprocessor PC. Equipped with its fans, the advantage of this method of cooling was chosen for the fact it is common and not very expensive. The size of the circuit will adapt quite easily to the type of sink that you have available, nine if possible, because often, those of recovery, the fans have already lived and the price of a new model remains very affordable.
Parts List:
C1,C4 = 47nF50v
C2,C8 = 4,7uF63v
C3,C5 = 22nF50v
C6,C7 = 1nF50v
C9 = 100nF50v
C10,C15 = 2,2nF
C11 = 27pF
C12,C18 = 82pF
C13 = 120pF
C14 = 8,2pF
C16 = 22pF
C17 = 47pF
D1,D2 = ZENER 3,9v
L1 = 2,4uH
L2 = 360nH
L3,L4,L5 = STRIP-LINE
Q1 = BLF245
R1,R3 = 5,6 Ohms
R2,R7 = 1,8Kohms
R4 = 6,8Kohms
R5,R6 = 10Kohms
R8,R9 = 12 Ohms
R10 = 220 Ohms
T1 = TRANSFO COAXIAL
T2 = TRANSFO 2x500nH
Visis this page for detailed explanation and tutorial of the RF amplifier circuit.
About RF Amplifier
An RF power amplifier is a type of electronic amplifier which is utilised to convert a low-power radio-frequency signal into a larger signal of significant power, usually for driving the antenna of a transmitter. It is usually optimized to have high efficiency, high output Power (P1dB) compression, good gain, good return loss on the input and output, and optimum heat dissipation.
The basic applications of the RF power amplifier include driving to another high power source, driving a transmitting antenna, microwave heating, and exciting resonant cavity structures. Among these applications, driving transmitter antennas is most well known.
More explanation about power audio amplifier can be found at wikipedia.org
This is a demonstration about 01A RF Amplifier which is build used old tube component to amplify the signal. An RF power amplifier is a type of electronic amplifier which is utilised to convert a low-power radio-frequency signal into a larger signal of significant power, usually for driving the antenna of a transmitter. It is usually optimized to have high efficiency, high output Power (P1dB) compression, good gain, good return loss on the input and output, and optimum heat dissipation.
The basic applications of the RF power amplifier include driving to another high power source, driving a transmitting antenna, microwave heating, and exciting resonant cavity structures. Among these applications, driving transmitter antennas is most well known.
More explanation about power audio amplifier can be found at wikipedia.org
Watch the video:
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