Full-color, full-res graphics from the pages of AmQRP HOMEBREWER magazine
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Software Defined Radio ... by M.Klaper, HB9ARK and J.Piri, WD6CSV |
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 XTAL, DDS and downconversion |
 Power supply and control |
 Octavefilters and 1 W PA |
 Debug Window for the software developer |
 The SDR-1000 User Interface |
 CW controls |
 Fast convolution filter curve 2100 Hz |
 Fast convolution filter curve250 Hz |
 Fast convolution filter curve 25 Hz |
 Enclosure by John Piri, WD6CSV |
 A template is provided for drilling the front panel. The template is 5 ¼” x 2 ¾” |
 The 3 board set with fan is mounted as shown here. |
 In this installation a 20 watt Communications Concepts power amplifier was mounted in the back of the box for extra power |
 RF spectrum generated by the SDR-1000 without the power amplifier or additional filtering on the 20 meter Ham band. |
 External 20 meter filter used to keep harmonics at -80 dbc when using the 20 watt power amplifier on 20 meters. |
Material and concepts presented on
These pages are designed and maintained by George Heron, N2APB
Page last updated: September 6, 2003