AR305 Complete Kit

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This amplifier design covers frequencies from HF to VHF with a power output level of 300 watts using RF power MOSFETs. The MRF151G used in this design is considered as a state of the art device. The MRF151G is housed in a special push-pull header commonly known as "Gemini" (twins) meaning that there are two identical transistors mounted next to each other on a common carrier or flange. This amplifier was originally designed for operation from a constant 40 to 50 volt power supply. The frequency range of this amplifier design is 10-175 MHz. As the MRF151G is basically made for operation from a 50 volt supply, lowering the voltage down to 40 volts would make the unit almost indestructable against load mismatches such as open coax or a broken antenna.


 Frequency Range                     10-175 MHz

 Power Input                              15 watts (typical)

 Power Output                            300 watts (typical)

 Input Impedance                       50 ohms

 Output Impedance                    50 ohms

 Input Voltage                            40-50 volts DC

 Input Current                            12-15 amps (typical)

The component set includes:

1 ea.   Capacitor Set                       

1 ea.   Resistor Set

1 ea.   Ferrite Set                             

1 ea.   Transformer Set

1 ea.   Printed Circuit Board            

1 ea.   1N5923A  8.2V Zener Diode

1 ea.   MRF151G FET


AR305 Engineering Application

AR305 Parts Placement

AR305 Zener Modification

MRF151G Data Sheet

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