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Home › Magazines › 2009 › December › Preselector for Elektor SDR

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Preselector for Elektor SDR

Here’s the automatic tuning upgrade!

Published in issue 396, December 2009

Preselector for Elektor SDR
The performance of a receiver depends to a large extent on its input filters. A selective input circuit improves antenna matching and immunity to interference from other strong signals. The preselector described here allows the use of up to four filters, tuned under software control using varicap diodes. A tuned loop antenna is also described that lets you use the Elektor SDR receiver without an outdoor antenna.

Extra info, Updates

Components

Relevant websites

Free downloads

Relevant products

Features

  • Four tuneable front-end circuits
  • Controlled by free SDR tuning software
  • I²C bus control
  • Long-, medium- and short wave reception
  • 500 pF varicap diodes
  • Suitable for use with a wire antenna, a loop antenna or a ferrite rod

Click below to download a PDF copy of this article from Elektor magazine.

 

Downloads 
Article PDF
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PCB PDF
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Order this magazine 
Magazine December 2009
UK396 (US $ 7.50)
 

Order from Elektor 
Kit of parts, contains partly populated board, coil formers, ferrite rod with coils
090615-71 (US $ 75.90)
 

Order from ThePCBShop 

PCB, bare
 

Free downloads 

Software

Free download
Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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