Quick look at the NanoVNA

For a while now there is a very inexpensive Vector Network Analyzer (VNA) called NanoVNA available from various sources. At a price point of less than 50 USD it is very affordable for hobbyists. But is it any good? The Nano VNA covers the frequency range from 50 kHz – 900 MHz, has a small […]
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Lumped-Element Wilkinson Splitter / Combiner Design

This is a supplemental article to two of my videos on my YouTube channel about the theory and design of Wilkinson splitters and combiners. A Wilkinson divider is a specific class of power divider with high isolation between the output ports. This feature is particularly useful when used as a combiner. This article will show […]
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850 MHz Scanner Preamplifier / Filter Project

This article shows how to use off-the-shelf parts to improve the performance of a radio scanner in the 800 – 900 MHz band. Furthermore, it shows how to expand radio coverage by using two different receive antennas at the same time. For some reason, my new BCD996XT scanner wasn’t working as expected on the statewide […]
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KF5OBS #16: HT RX/TX Performance Upgrade (Tiger Tail)

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Yaesu FT-8800 Extended TX (MARS/CAPS) Mod

The Yaesu FT-8800 and FT-7900 are very popular radios. For some activities, it may be desired to be able to transmit outside of the amateur radio bands. This article will show how to do this modification with minimum effort at home. Driving a transverter, participating in the Military Auxiliary Radio System (MARS) or Civil Air […]
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KF5OBS #15: Microwave Frequency Meters

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