Wednesday, October 10, 2012

Airband_3T_IC_BF199_BC547_LM386

The antenna is connected to a tuning and band pass filter at the same time (wave trap).
Two high frequency transistors BF199 amplify the RF.
One diode detect the audio AA119 (Schotcky diode).
BC547 and LM386 is an audio amplifier.
The circuit is regarded as TRF

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