Here’s easy to build high-quality PLL Radio Transmitter for FM broadcast, with typical output power of 5 W and no-tune design. The transmitter includes RDS/SCA input and Audio/MPX input with optional preemphasis. It can be used with or without stereo encoder. Tuning over the FM band is provided by two buttons that control dual-speed PLL. The transmitter can work also without the LCD display.
The characteristic of PLL Radio FM Transmitter:
Supply voltage: 11-13.8 V (stabilised or from a battery)
Supply current: up to 1.2 A
Standard frequency range: 87.5-107.9 MHz
Audio/MPX input sensitivity: 2 V pp (for 75 kHz freq. deviation)
RDS/SCA input sensitivity: 0.2 V pp (for 7.5 kHz freq. deviation)
Board dimensions: 109 x 54 mm
PLL Radio FM Transmitter Schematic Diagram
Transmitter Schematic
PLL Radio FM Transmitter Printed Circuit Board
Transmitter Component Layout
Transmitter PCB-Top
PLL Radio FM Transmitter Part list
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