40Mhz RF Amplifier Circuit

This is the 40Mhz RF amplifier circuit. The sensitivity of a receiver may be significantly increased if this circuit is inserted between the receiver and the antenna. The amplifier circuit does not use resonant circuits and is suitable for both medium and for the short waves, up to 40 MHz.

The gain of this RF amplifier is 20db and it consumes 7mA electric current, when it is supplied with 12 until 15V dc. The input and the output should be connected with coaxial cable, resistance 75ohm.

Parts List:

R1 = 75ohm R2 = 10Kohm R3-7 = 5.6Kohm R4-5 = 4.7Kohm R6 = 820ohm R8 = 470ohm R9 = 2.2Kohm R10 = 68ohm

C1-3 = 47nF/100V C2-4 = 10nF/100V C5-6 = 47nF/100V Q1-2-3 = AF125 J1-2 = Jack BNC

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.

Watch the video: