EFHW MULTIBAND ANTENNA with 49:1 UnUn home made (PART1)

I made my first multiband experimental version of Multiband EFHW antenna. In this first part I want show you complete process of made this antenna. In the next, second part I would like to test this antenna in the real outdoor conditions and do measurements with my antenna analyzer Mini1300 and possibly make some QSO's. NOTE: We recommend to use a FT240-43 material for lower loss and better efficiency of this antenna!
I hope you will enjoy this video. If you like my videos, please don't forget subscribe to my channel ;-)
73, Paul.

- Link to my website: http://www.sk-tech.sk/om0et/efhw-49-1-unun.html
- Very informative website about the EFHW Antennas: https://owenduffy.net/blog/?s=Efhw+transformer
- Dan Koellen AI6XG website here: https://www.ai6xg.com/post/efhw-xfrmr-capacitor
- Download my EFHW Antenna Calculator: http://www.sk-tech.sk/om0et/files/OM0ET-EFHW-Antenna-Multiband-Calculator.ods (OpenOffice recommended)
- AMIDON Toroid FT240-31 Specification: https://ferrite-shop.com/product/ft240-31-ferrite-toroid/
- AMIDON Toroid FT240-43 Specification: https://ferrite-shop.com/product/ft240-43-ferrite-toroid/

NOTE: In the EFHW Antenna Calculator were used two different formulas for metre and for feet lenghts. Therefore direct conversion between them doesn't match and they slightly differ. It's due to my experimental research, until I will find which one will be closer to reality during my next tests. To open the Calculator we recommend use the free OpenOffice software

#EFHWmultibandAntenna #HomeMade #OM0ET

Видео EFHW MULTIBAND ANTENNA with 49:1 UnUn home made (PART1) канала OM0ET