Tag: receiver

Decoding time station signals (DCF77 etc.) with a microcontroller

By Peter Baier (DK7IH) Abstract This article shows how to apply a off-the-shelf time signal receiver to a microcontroller, refers about the signal coding and describes the necessary software written in “embedded C”. Hardware Receiver modules are available through various vendors on the internet, a respective search pattern could be this one. Time signal transmitters…

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A very compact SSB transceiver for 40 Meters with 50 watts of output power (Product detector, AF, AGC)

The demodulator section of the transceiver’s receiver starts with the product detector, which is made of another SA602. To get more audio volume a preamplifier has been added before the LM386 follows. The AGC section hast got 2 crucial components: One resistor (this case 100k) and an electrolytic capacitor (in this case 100uF): They determine the time…

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