WA3TFS SDR Upverter Design

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WA3TFS Upverter-720px.jpg

Features

SDR up-converter/receiver shifts low frequencies up by 100 MHz. Used to listen to HF frequencies on an inexpensive RTL-SDR module.

= Schematic

WA3TFS Upverter Schematic.PNG

Software

Build

  • Nice silver mica caps
    • My kit was missing the center cap of the band filter (150 pF)
  • Real SBL-1 mixer
  • Build was tough due to very small pads on the PCB
    • Particularly tough to solder ground pads
    • Pad shapes were not round so less area to set soldering iron
  • Pin 1 orientations on the mixer and oscillator "backwards" from other board legends

Enclosure

Adafruit 2230-00.jpg

2230-03.jpg

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