This
house FM transmitter for your stereo or any other amplifier provides a
good signal strength up to a distance of 500 meters with a power
output of about 200 mW. It works off a 9V battery.The
audio-frequency modulation stage is built around transistor BF494 (T1),
which is wired as a VHF oscillator and modulates the audio signal
present at the base. Using preset VR1, you can adjust
Wednesday, April 3, 2013
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