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EFHW transformer re-visited: improved core material & easier efficiency measurement 10 месяцев назад


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EFHW transformer re-visited: improved core material & easier efficiency measurement

Part 1: Demonstrating a (easier) measurement method to determine broadband-transformer efficiency. Confirming older measurements and testing new core material, that improve efficiency of the EFHW-Transformers. Part 2: (upcoming - not yet published): Effects of winding patterns and how to reduce bad SWR. Sources: 1. https://github.com/DG1JAN/UniBalun DG1JAN´s GitHub with Antenna PCBs, his own measurement reports and his genious excel sheet. 2. https://www.ai6xg.com/post/evaluating... The source where Jan got his idea from. 3.    • Best Ferrite Core For a 100w End Fed ...   MM0OPX / Colin´s original Video, recommending the big fair-rite core for 100W EFHW Transformers. 4.    • Antenna building #2 - EFHW Antenna - ...   My first Video, where I was trying to figure out the right core material, size and measurements.

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