World Wide Publications From and About FlexRadio Systems Products

FlexRadio CEO, Gerald Youngblood, K5SDR published a series of articles on Digital Signal Processing and Software Defined Radios in QEX and CQ VHF magazines in 2002 which unquestionably started the software defined radio revolution for amateur radio.  The quintessential  four part QEX article series  described the  key elements that went into concept and design of the SDR-1000™ transceiver.  The reprints are provided  below by permission of the publishers.

Page Last Updated:  Friday, October 02, 2009

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FLEX-5000 Software Defined Radio Articles

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FLEX-3000 Software Defined Radio Articles

Read the Oct. 2005 QST review of the SDR-1000

A Software Defined Radio for the masses, Part 1; QEX July/Aug 2002 Introduces Digital Signal Processing (DSP) as it is applied to Software Defined Radios (SDR). Also provides an overview of the SDR-1000 transceiver architecture. .	A Software Defined Radio for the masses, Part 2; QEX Sept/Oct 2002 Discusses the use of DirectX to implement a full duplex interface to a PC sound card using Microsoft Visual Basic.  Complete source code is provided.	A Software Defined Radio for the masses, Part 3; QEX Nov/Dec 2002   Illustrates the use of DSP to turn the PC sound card interface from Part 2 into a functional    software-defined radio.  Also, it explores a powerful filtering technique called FFT fast-convolution filtering.	A Software Defined Radio for the masses, Part 4; QEX Mar/Apr 2003 The series concludes with a description of a DC-65MHz transceiver (the SDR-1000) that will allow open software experimentation with software-defined radios.
April 2005 QST Review Letter to QST Editor Used with permission.  April 2005 QST © ARRL	Digital Connection: Software Defined Radios CQ Magazine October 2003 Don Rotolo, N2IRZ, the Digital Editor for © CQ Magazine. Used with permission.	The "Soft" Radio CQ VHF Magazine Summer 2002 The article by Gerald Youngblood, W5SDR, provides an introduction to Software Defined Radios and typical SDR architectures.  Used with permission	Homebrew Software Defined Radio with the SDR-1000™ Transceiver Homebrewer Magazine Summer 2003 By Martin Klaper, HB9ARK, and John Piri, WD6CSV Reprinted with permission from HOMEBREWER Magazine
Software Defined Radio Model SDR-1000™ Old Man Magazine November 2003 © Union of Swiss Short Wave Amateurs (USKA) Old Man, 2003, Used with permission	Software Defined Radio Model SDR-1000™ (Français)  (Deutsch) Old Man Magazine November 2003 © Union of Swiss Short Wave Amateurs (USKA) Old Man, 2003, Used with permission	Software Defined Radio SDR-1000™ Review (Deutsch) CQ-DL Magazine October 2003 By Martin Klaper, HB9ARK © CQ-DL Magazine Used with permission.	First Experiences With The SDR-1000™ (Deutsch) CQ-DL Magazine July 2004 © CQ-DL Magazine Used with permissio.
Test Materiels Nos essais autour du SDR-1000™ (Français)   © Ondes Magazine Used with permission	SDR-1000™: A Flexible QRP Transceiver (Français) Pages: 1  2  3   © Ondes Magazine Used with permission	Hubert F6GOG looks at the SDR-1000™ (Français) Pages: 1  2  3   © Ondes Magazine Used with permission	Reviews the SDR-1000™ from FlexRadio Systems (Swedish) Willi Reppel,SM6OMH The Society of Experimenting Swedish Radio Amateurs - ESR) ESR is a Society for spreading Knowledge of Radio Communications Technology devoted to Amateur Radio.
SDR-1000™: Software Controlled Transceiver (Français) © RadioRef Used with permission