43 dB high gain antenna amplifier circuit diagram
This antenna amplifier is very useful for 35kHz-150Mhz frequency band . This antenna amplifier circuit is based on transistors and has a low 3dB non-linearity and a high gain of 43 dB .
The input and output impedance for this rf amplifier circuit is 75 ohms.
The L1 and L2 radio frequency coils are constructed from a 0.25 mm CuEm wire , with a 5 mm diameter . Both coils require 10 number of turns .
All used transistors are of the same type and can be BF183, BF200 or other similar type . The total consumption of this rf amplifier is very low , the circuit will need only 20 mA .
This rf amplifier circuit needs to be powered from a 12.5 volts DC power supply circuit .