- Published in issue 4/1994 on page 54
Direct conversion receivers (2):
SOME NOTES ON DESIGN AND CONSTRUCTION TECHNIQUES, AND THREE PRACTICAL EXAMPLES
In the previous instalment of this article we examined the theory behind direct conversion receivers (DCR). In this final instalment we will take a look at three simple projects that are based on the principles discussed in Part 1. Three different designs are selected for testing: the 40 and 75/80·meter bands 'Neopbyte' design by John Dillen': a aü-meter band HF receiver based on the passive DBM designs of Lewallen and Campbell''; and a VLF design. All three designs were fabricated and tested on a common test chassis built especially for the purpose.