Wednesday, November 23, 2011
This is the circuit diagram of 40W wideband RF power amplifier 88 - 108 MHz build based MOSFET MRF171A. The purpose of this circuit is to boost the output power of low power FM broadcast band exciters, a number of these are available commercially, both as kits and ready made.
This design is based on a new MOSFET device, with the attendant advantages of high gain, high efficiency and ease of tuning.
Wednesday, November 9, 2011
This is 8W FM RF amplifier for frequency range of 88-108 MHz with no tune broadband) needed to cover all the FM Band. The circuit use BLV10 as the main amplifier component. You need the 2N3866 driver stage to boost properly the BLV10 transitor.
Wednesday, November 2, 2011
The above design is very simple FM RF amplifier 8W Watt based 2SC1971 VHF power transistor. The RF Amplifier PCB layout designed for FM broadband 88-108 MHz transmitters using microstripline technique. This 8W RF amplifier circuit provides an appropriate power boost for transmitters with an input of 500 mW.
RF Amplifier PCB
The PCB outline is 77 x 56 mm use FR-4 double sided photoresist epoxy pcb material for best results.
RF Amplifier Construction
All SMD components are 1206 types. Connect the bottom layer (groundplane) on several points (through via's) with the top layer of the PCB.