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IQSDR

Homemade

Fernempfangsradio II Harzburg - DIY Radio Group


A modern amateur radio project for young and old

An SDR-IQ receiver for 4-6 amateur radio bands.
Autor: Klaus Raban, DM2CQL

Once the SDR-beginner-kit has been reproduced successfully in large numbers, were always requests for further development. The FA currently in the newly launched successor system will indeed satisfy the special-needs. . . but may, as a sending option is included, no longer in the lower low-cost sector are located. In the following featured receiver variant is a "drilled" SDR-entry kit for the practice with some important improvements. The main differences to [1] are:

  • The quartz-LO is replaced by a tunable via the RS232 interface PLL-Oszillator. By Burkhard Kainka and Dirk Neyen written tuning software is freely available to all subsequent users. (Now we have a DLL for WinradHD with which the Harzburg radio can be controlled directly.
  • At the entrance can be made more cost while maintaining the single-circle principle, but with three switchable coils and two capacitance diodes of the input circuit almost the entire short wave range are brought into resonance.
  • All components, connectors and controls are located on a solid double-sided board with plated through pads, no wire connections must subsequently be introduced.
  • As the only 16-pin SMD component of QRP-project is already preloaded, this kit for newcomers and experts alike.



ANNEX: Software
The ideal software for our radio program is the WinradHD of Mario, DG0JBJ. Robert has a matching one extra DLL written with the description directly from our Fernempfangsradio WinRad out can. Furthermore, this DLL offers the possibility, frequencies and transmitters to save them later from a list and call again.


Note: These are excerpts from the o.a. Solution of the DL-QRP-AG, Version 1.08

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QRPgroup

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Circuit diagram

HB SDR Schaltung  V1.3

The kit (2-15 MHz), including housing was based on the QRPproject online shop.

Thanks to DL2FI, QRPeter and the appropriate forum participants for progress reports on their own and other tips and tricks.


Year 2010

And again, some views

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