![]() Furthermore, I wanted the tuner to help me experiment with my many oddball home-brewed HF antennas! I intended to design my homebrew antenna tuner to suit my specific antenna system situation, instead of using a more "universal" design which is a "one-size-fits-all" device normally intended to be useful in "most" circumstances, but generally only with reasonably well-designed HF antennas. The drawback was that their higher "Q" meant that one could not deal with as large a range of antenna system impedances and operating frequencies as one can with a T-network. I learned that, much like L-networks, the efficiency of link-coupled networks was much greater than the popular T-networks. While reading the many articles that were published on the Web and amateur radio books, I was discovering that they had a lower parts count and, in some instances, were less complex to build while remaining capable of transforming a fair range of impedances down/up to 50 ohms - which is the nominal input/output impedance of HF transceivers and amplifiers. Link-coupled network: this is where things got interesting. I published a short summary of my preliminary findings on tuners in my ebook on HF antenna accessories (see ref.1 below). I studied the most popular antenna tuner networks in search of the best set of compromises for my purposes.
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