BH1417 FM Transmitter This is the latest BH1417 FM Transmitter design from RHOM that includes a lot of features in one small package.
It comes with pre-emphasis, limiter so that the music can be transmitted at the same audio level, stereo encoder for stereo transmission, low pass filter that blocks any audio signals above 15KHz to prevent any RF interference, PLL circuit that provides rock solid frequency transmission (no more frequency drift), FM oscillator and RF output buffer.
There are 14 possible transmission frequencies with 200KHz increments that users can select with a 4-DIP switch.
Lower band frequencies start from 88.
7 up to 89.
9 MHz, and upper band frequencies start from 107.
7 up...

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