Circuit for power linear RF amplifier with BLY90

  
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It is to be used as amplifier of potency of RF in the high strip of of the power source that should be capable to supply a tension of 13 volts with a current of 10 amperes. it demands right care in the assembly of the source. Terrified armored transformer, and three shocks of RF to filter the components of high frequency. XRF1 and XRF2 are 30 youturns of wire 25 AWG in a nucleus of ferrite of 1 cm of diameter
Circuit for power linear RF amplifier with BLY90 - schematic

and 5 cm length. It can use one of a source at/atx bad, it is easier. XRF3 are 100 you turns of wire 25 AWG in a ferrite nucleus and 1cm of diameter for 5cm of length. Or use an usually found in the exits of sources ATX`s. something around 100 µH. The capacitors C1, C2, C3, C4 should be ceramic of 600 V or more and the capacitors of 10nF are for 100v. RX cannot be of wire. The Transistor BLY90 was developed to work in the classes THE, B and C, with 12. 5V current of 8A. For applications above 175MHZ. Below we have the diagram circuit of the amplifier using an only transistor BLY90. All capacitors should be ceramic. The resistor of 10 © for 1 w should not be of wire, the entrance impedance and exit is of 50 ©, soon it should be linked with cable of 50 ©. It should be observed the legal restrictions as the operation of that equipment type. Below we have the drawing of the printed circuit board of the transmitter, observe that the components are mounted beside the copper and with the terminals the shortest possible, use heatsink in BLY90.



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