500mW FM transmitter


Posted on Nov 21, 2012

The TX500 is a simple to build 500mW FM Transmitter. It consists of three blocks; modulator / oscillator, two stage 500mW VHF amplifier and LED based power meter. The TX500 allows to transmit audio signals to FM band at frequencies from 88 MHz to 108 MHz. Due to the very low power consumption of less than 100mA the circuit may be perfectly powered by using 9-12V battery or power supply if you prefer. The circuit has been divided into separate stages so that it is be better for everyone to understand how every part works independently.


500mW FM transmitter
Click here to download the full size of the above Circuit.

The carrier frequency of an oscillator is determined by the capacity of C4, C5 in conjunction with the inductance of the coil L1. 3.5 turns are needed and 27pF for C5 to tune to a lower part of FM band (88-100MHz). To be able to tune to a higher part (100




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Low-Noise 420Mhz Atv Receiver/Converter
Motion Detectors with Infrared Sensors
Circuit Diagram for a 12V LED Lamp
250mw 16 db vhf amplifier
XC6121 Voltage Detector With Watchdog Function And ON/OFF Control
The NOT gate
Car Battery Charger Circuit
Strobe Flash Light Circuits
AC Locomotive Auxiliary Equipment
Automatic water tank circuit diagram



Top