lørdag den 21. december 2019

Doublet multi-band antenna

For many years, I've used a lazy loop antenna for the HF-bands, and it has served me well. I've used it for working the difficult zones for WAZ. This antenna has - literally speaking - worked the world!

Now I've decided to return to an old favorite: The center-fed doublet antenna. From 1991 to 1996 this antenna helped me work many Carribbean stations on CW with 20 W output. In order to complete my QRP-DXCC award, I need QRP QSOs from that part of the world. That is the main reason for reverting to this antenna type. My present lazy-loop antenna is not strong into that part of the world.

Center-feeding a wire antenna is a big advantage, because it can be forced to work on (nearly) any frequency. Even though the antenna is resonant in the 40 meter band (7.0 - 7.1 MHz), the 80 meter band (3.5-3.8 MHz) can be covered using an antenna tuner.

The antenna dimensions are those of a 40 meter dipole:
Doublet wire antenna (resonant in the 40 m band).

I'll let you know how this antenna works.

Merry Christmas and Happy new year!

OZ1BXM Lars
Homepage: oz1bxm.dk 

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