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20W FM RF Amplifier Circuit

This FM RF power amplifier has 2 transistors from Philips: BLV10 and BLW87. The 2 rf transistors work in class C and this fm amplifier has a total gain of 21dB (100x) and 55 – 65% efficiency. One low pass filter with 9 components ensures 60dB rejection of the the second harmonic. There is no need for tune-up to cover the whole 88-108 MHz FM band.

20W RF FM amplifier circuit diagram

RF Amplifier Photo

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