What EFHW Core and Winding to use for HIGH POWER?

Link to my spreadsheet of results

https://docs.google.com/spreadsheets/...

Best 100w EFHW

Best Ferrite Core For a 100w End Fed ...

How to test EFHW transformer efficiency

How to measure Insersion Loss of an E...

Many thanks to Tom G2NV for thr loan of the cores.

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