Tag Archives: high frequency amplifier

4 Watt / 900Mhz RF Amplifier

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This RF amplifier circuit has a power output of 4 Watts at a frequency of 900 Mhz. Applying Wilkinson power dividers in the base and collector circuits of Q2 and Q3, a couple of SD1853 driver application transistor are paralleled for double the power output of the 2-W amplifier. The… Read more »

144MHz Power Amplifier Circuit

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The 144 MHz Power amplifier is designed to work with the transceiver 2-meter band. Power output depends on the output transistor: KT 904 – 4 to 5 watts, KT 907 – 7 to 8 watts, 2N3375 – from 7 to 10 watts, 2N3632 – from 8 to 12 watts. The… Read more »