CW signal processor


Posted on Mar 2, 2013

This circuit provides interferenced rejection for the CW operator. The 567 phase-locked loop is configured to respond to tones from 500 to 1100 Hz. The Schmitt trigger reduces the weighting effect caused by the output of the PLL remaining low after removal of the audio signal. Ten to 15 millivolts of audio activate the circuit


CW signal processor
Click here to download the full size of the above Circuit.

For periods of loss of signal, circuit B will automatically switch back to live receiver audio after a suitable delay. (If a relay with a 5-volt coil is not available, the circuit can also be powered from +12 volts) When circuit B is used, the contacts on relay K1 replace SI.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Tiny pH-meter
    0-12V 2A power supply
    Automobile-locater
    4 x 25 W Car Amplifier TDA7381 Circuit
    Touch Switch Monostable/Timer with 555 IC
    500mw pll fm transmitter 88 108mhz
    Rear Light After Glow (For Bicycles)
    One of the battery discharge protection circuit



    Top