Kategorie: Ham Radio
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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…
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5 Band WAZ
Though I´m more on the technical side of our hobby it was milestone for me when I received the LoTW confirmation from KH6YY for a 80m sideband QSO. This was the last missing Zone for the 5 Band Worked all Zones (WAZ). I got the award number 1105: In detail there´s just one little drop…
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external antennas feature of the RF2K-S power amplifier
The RF2K-S solid state amplifier has a number of outstanding features. One of them is the way of dealing with complex antenna configurations. As a standard user you choose „internal antennas“ in the antenna setup if you up to 4 antennas connected to your amp. The 4 antenna outputs at the back of the amp…
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Multiplexer
Recent concepts for Multi/Multi, M/2 or SO2R station are based on monoband antennas. The reason is that you are by default operate on two bands simultaniously. In case of SO2R stations you are not transmitting simultaniously by you are transmitting on lets say 40m while searching for mults on lets say 20m. What you need…
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Ham Radio
Ham Radio / Amateurfunk is definitely my lifetime hobby. When I was 15 years old I checked out what weird wires a neighbour was pulling through his garden. We got in touch and I started listening to his ham radio morse code conversatoins with his friends all over the world. Together with another friend of…