Antenna building #2 - EFHW Antenna - figuring out the right core size

00:00 Introduction 00:40 Transformer core sizes 01:58 SWR measurement over artificial Load 02:33 Insertion loss measurement 03:14 Insertion Loss under power 03:38 Thermal cam under power 05:14 Insertion loss with NanoVNA 06:02 discussing results SWR 08:16 discussion NanoVNA insertion loss results 09:12 Power loss in broadband transfomer 10:25 discussing measurement under Power 11:07 comparison NanoVNA / Power measurement 12:20 core heating 12:35 conclusions 15:34 wrap up / outro Link to Jan´s GitHub: