100W FM Amplifier Circuit based MRF317 | Schematic Diagrams

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100W FM Amplifier Circuit based MRF317


100w fm amplifier circuti based mrf317 300x104 100W FM Amplifier Circuit based MRF317

This is the circuit diagram of 100W FM amplifier which use MRF317 as the main power component.

Circuit Features and Notes:

  • This Power amplifier is equiped with a bipolar transistor,the famous MRF317
  • As lots of FM amplifier application ,the power transistor is in a C class bias.
  • A 9 elements low pass filter ensures that we meet at least a 60 dB rejection from the carrier. (RF Simulation with RFSIM99)
  • The FM amplifier has a 10 dB gain with a 60 to 65% efficiency.
  • The Input VSWR is around 1.4 and there’s no problem to reach the max power in all the FM band..

MRF317 Features:

  • Designed primarily for wideband large–signal output amplifier stages in 30–200 MHz frequency range.
  • Guaranteed performance at 150 MHz, 28 Vdc
    Output power = 100 W
    Minimum gain = 9.0 dB
  • Built–in matching network for broadband operation
  • 100% tested for load mismatch at all phase angles with 30:1 VSWR
  • Gold metallization system for high reliability
  • High output saturation power — ideally suited for 30 W carrier/120 W
  • Peak AM amplifier service
  • Guaranteed performance in broadband test fixture

Download this MRF317 Datasheet for circuit project reference.

100W FM amplifier circuit source: http://radioinitiation.chez-alice.fr/english/ampli100W/ampli100w.html

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