Purdum’s time is spent writing books and QRP operating. Purdum has championed QRP operations and is an avid supporter of the Open Source movement, in both hardware and software. Purdum was first licensed in 1954 and has been licensed ever since and has been a Life Member of the ARRL since 1972. He is the author of 20 textbooks and more than three dozen articles, mostly on computer programming and QRP projects using microcontrollers. Jack Purdum is a retired professor of Computer Technology at Purdue University where he taught various computer programming courses. They are also co-founders of the Greater Cincinnati Builders Group and were awarded the RSGB’s Bennett Prize in 2021 for their article on their “Double-Double Magnetic Loop” antenna article in the February, 2020, issue of RadCom. Jack and Al co-authored the Software Defined Radio Transceiver (2022) and Microcontroller Projects for Amateur Radio (2019) books and numerous articles and presentations. Jack and Al collaborated to build the T41-EP, a 7 band, 20W, CW/SSB SDR transceiver and this presentation is chiefly about how they developed the high performance CW decoder.
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