Power FM Transmitter 30 Watt BLF245

Monday, May 21st, 2018 - RF Circuit

The circuit of power FM transmitter 30 watt BLF245 serves to amplify the signal FM transmitter, the transmit power of the transmitter power circuit can produce an output power of 30 Watt. Input fatherly circuit power FM transmitter 30 watts BLF245 This is an FM modulated signal with a power level of 750 MW. The circuit of power FM transmitter 30 watt BLF245 is working on an adjustable frequency range of 88 MHz to 108 MHz. The circuit of power FM transmitter 30 watt BLF245 uses MOSFET power transistor types BLF245. The circuit schematic and component list to create a power FM transmitter 30 watt BLF245 can be seen in the following figure.

The Circuit of Power FM Transmitter 30 Watt BLF245

Power FM Transmitter 30 Watt BLF245

Component list to create a circuit of power FM transmitter 30 watt BLF245 can be seen in the table lists the following components:

Components list Power FM Transmitter 30 Watt BLF245

  • C1,C4
  • C2,C8
  • C3,C5
  • C6,C7
  • C9
  • C10,C15
  • C11
  • C12,C18
  • C13
  • C14
  • C16
  • C17
  • D1,D2
  • J1,J2,J3,J4,J5,J6,J7,J8
  • L1
  • L2
  • L3,L4,L5
  • Q1
  • R1,R3
  • R2,R7
  • R4
  • R5,R6
  • R8,R9
  • R10
  • T1
  • T2
47nF50v
4,7uF63v
22nF50v
1nF50v
100nF50v
2,2nF
27pF
82pF
120pF
8,2pF
22pF
47pF
ZENER 3,9v
Jumper + ferit Bit
2,4uH
360nH
STRIP-LINE
BLF245
5,6 Ohms
1,8Kohms
6,8Kohms
10Kohms
12 Ohms
220 Ohms
TRANSFO COAXIAL
TRANSFO 2x500nH

FM transmitter circuit power MOSFET 88-108 MHz with BLF245 in the image above requires a +28 volt DC voltage source. The input signal to drive the transmitter power circuit is the modulated signal with a power of 750 MW input given on track circuits power FM transmitter 30 watt BLF245 above.

BLF245 MOSFET power transistor in the circuit power FM transmitter 30 watt BLF245 above require cooling (heat sink) is quite good, because it will generate heat and this heat must be removed in order BLF245 MOSFET power transistor can work optimally on strengthening the FM modulated signal. Cooling for power MOSFET transistor BLF245 can use an aluminum plate with fins that good plus DC fan that attaches to the cooling plate.

Power supply to the circuit power FM transmitter 30 watt BLF245 in the image above requires a power supply with +28 volt DC voltage with a stable and regulated so that power FM transmitter 30 watt BLF245 to work optimally.

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