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27 November, 2002

Direct Conversion receiver




A simple direct conversion receiver. I have sucessfully made it for 3.5MHz, 7MHz, 10MHz and 14Mhz. I cannot give you any schematic though, since i built it completely by head, not documenting as I worked. Not very smart.


It uses a NE612 mixer, with an VFO on the receiving frequency. The receiver is quite sensitive, and due to the balanced output to a LM386 audio amp, it does not suffer very much from intermod. 


 My board etching was a bit off, so I had to solder a bit on the tracks to make them solid. Besides, it looks good doesn't it ?

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2 comments:

  1. Unknown21 November, 2013 13:47

    Hello could you please send me details about it (Direct Conversion receiver)
    im thinking to do it (ernando@oi.com.br)

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  2. dddd22 November, 2013 12:53

    Hello !

    Sorry, but all the details are in the pictures. I have no other documentation than the information presented here unfortunatley. It uses on LM386-1W audio amp and a NE602 mixer. Being a DC receiver, the LO is at carrier frequency and uses a varicap for tuning.

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