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Personal Website
Dr. Samuel Ritchie EI9 FZB
An SDR front end that covers the HF band and interfaces with a PC.
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A multi-part article accepted for pubishing in PW Magazine (https://pocketmags.com/practical-wireless-magazine)
Part One - The QPD (Published in January 2022 edition)
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All the photos and schematics in the article.
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Information on some of the components used.
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How to get the gerbers or just order the PCB.
Part Two - LW and MW (Published in February 2022 edition)
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All the photos and schematics in the article.
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Information on the potentiometer used.
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Example of the voltage divider calculations.
Part Three - Single band operation (Published in March 2022 edition)
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All the photos and schematics in the article.
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Information on some of the components used.
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How to get the gerbers or just order the PCB.
Part Four - Fixed operation (Published in April 2022 edition)
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All the photos and schematics in the article.
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Information on websites and some of the components used.
Part Five - Covering 3-30 MHz (Published in May 2022 Edition)
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All the photos and schematics in the article.
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Information on some of the components used.
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How to make the dial using VISIO.
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The ZIP of the VISIO file.
Part Six - Towards an all-band HF receiver Part A (Published in the June 2022 edition)
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All the photos and schematics in the article.
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Information on some of the components used.
Paper Seven - Towards an all-band HF receiver Part B (Published in the July 2022 edition)
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All the photos and schematics in the article.
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Information on some of the components used.
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Schematic of the MCU and DDS.
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Using an optical encoder.
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The ZIP of the VISIO file used to make the Decal.
I have some spare parts / PCB's - list is here
Updated - 12 July 2022

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