DF9LJ
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40m OWA Yagi for Region 1 and 3, 7.0 – 7.2 MHz
OWA Yagi Antennas are well known and introduced by WA3FET. A nice design for the Region 2 was published by Greg Ordy, W8WWV [1]. It is a 4 el Yagi, where 2 elements form the OWA cell added by a reflector and a director. I changed W8WWV´s design for and adapted it to the region…
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Update: Multiplexer
Stein, LB3RE contacted me recently and asked if I could extend the ealier described Quadplexer circuit for use of 160/80/40m. As I already pointed out it is a modular concept. You can just remove the band you don´t need and add another one of your choice. Here´s one idea for 160m and 80m: Design values:…
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How to use MS-A (azimuthal magnetic sensor) in your Arduino antenna rotator control projects
The MS-A sensor is a commerical product (Trademark 4O3A Signature) used for the 4O3A rotator genius antenna rotator. It might also be used standalone with Windows app. Then it´s connected to the computer using a USB-RS485 converter and showing the heading on a compass rose. However if you just want to use the magnetic sensor…
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Repair of Yaesu G-1000DXC rotator control
I took part in the Worked All Germany this weekend when after a few hours I couldn´t turn my antenna any longer. The rotator controll YAESU G-1000DXC was not illuminated any longer and the rotator stopped working. So I opened the cabinet and started investigation starting from the 240V connector. Wiring and power switch…
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Wide Band Vertical Antennas (WBV) by DF9LJ
August 8 th 2022 How it started – studies on groundplane antennas This post is published under a creative commons license CC-BY-SA-NC 2.0. Please check the details here. You may share and use for non commercial purposes but please always cite this website as the genuine source. The usage of antennas over a wide range…
Impressum und Haftungsausschluss
© Jörg Süßenbach