40 - 80 meters band CW reciever

  
This circuit comes as is. The reciever Consists by a RF preamplifier at the antenna input, using the 2N5485, and through the mixer ( ADE-1 ) the signal goes to gain amplifier and to the low pass filter to mutting circuit ( 2N5485 and LM386 ). The Buffering takes care the two transistors 2N2222A. The local oscillator use a cristal and a SA612.
40 - 80 meters band CW reciever - schematic

A "universal" CW receiver for 80m + 40m (easy to adapt for other bands). Full featured, yet simple construction and easy alignment. Direct conversion design for simplicity and performance. Needs Low current drain from 9-to-12 volt power supply.



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