This fm project is fm transmitter using phase locked loop (PLL) method. PLL controlled by PIC16F84A or 16F628A and I2C IC TSA5511 from Philips with LCD display. The fm transmitter is very stable on working frequency 88-108 MHz.
Oscillator of the fm transmitter is generated by a FET transistor BF981 and varicap BB809 and buffered by BFR91, BFR96 with final amplifier 2SC1971. Output power final amplifier is around 8 watts. Low pass filter after final section composed by 9 element LPF.
The layout of the 8 Watts fm transmitter has been created with sPRINT Layout v3.0. You can get a Shareware copy at: www.abacom.de. The pcb outline is 146 x 72 mm (width x height), bitmaps have a resolution of 600dpi. Use FR-4 single sided photoresist epoxy pcb material for best results. (*) When printing the layout, be sure to resize it!
Download project documentation
See more: Transistor FM Transmitter - FM Stereo Transmitter - FM Amplifier
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