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Why a Diplexer Solved the Problem I Was Looking for Somewhere Else

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  I’ll never forget the weekend I spent tearing my station apart, thinking my new HF transceiver was the culprit behind a mysterious noise problem. I had installed it a few weeks earlier, and everything seemed fine at first. Then, during a late-evening net on 40 metres, there it was—a faint, buzzing hum creeping into my receive audio. It was subtle but maddening. I swapped coax, retightened connectors, even fiddled with grounding schemes, but nothing worked. Then I remembered a conversation with a fellow club member about Diplexer use in multi-band setups. Honestly, I almost dismissed it as overkill—but that lesson cost me an entire weekend. Where Things Started Going Wrong I had a classic setup: a 20-year-old HF Yagi for 10–20 metres, a vertical for 40 metres, and a mobile whip for 80 metres. Each antenna had its own feedline, and I was hopping between them depending on propagation. What I didn’t account for was how signals from one band could bleed into another through the feed...
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The mistakes that taught me more than any hf radio transceiver ever did

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  It was late afternoon, the kind of Australian summer light that makes everything look golden. I was hunched over my bench, sweating slightly, listening to the hum of my old hf radio transceiver while trying to get a new antenna to work. I thought I’d done everything right—fresh coax, proper grounding, and a shiny new adapter for antenna I’d picked up from Comtek Radio. Yet, the signals were weak, sporadic, and almost nonexistent on the bands I expected to be lively. Look, I’ll be honest, that day was a humbling reminder that no matter how much gear you buy, the devil’s always in the details. So Is the hf radio transceiver Really the Problem? Does a better hf radio transceiver always solve reception issues? Not really. I learned that the hard way with a setup I spent weeks perfecting. I had splurged on a mid-tier rig, thinking the old one was just outdated. Big mistake. I was convinced the radio itself was underperforming, but after hours of testing, I realized the culprit wasn...
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Why a Bad Antenna Cable Connector Can Ruin an Entire Station

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  Look, we’ve all been there. You’ve got a station built up just the way you like it: solid antenna, clean coax run, and the radio purring along. But then, for some reason, the signal’s not what it should be, or your SWR is spiking for no good reason. So, you start checking everything—cables, antenna, the radio settings—only to find the issue isn’t the big stuff at all. Nope, it's the smallest, most overlooked part: your VHF antenna connector . I can’t tell you how many times I’ve wasted hours tracking down strange, intermittent issues, only to discover that a simple connector was the problem. Doesn’t matter how good your radio or antenna is if your antenna cable connector is poor quality or damaged. Here’s where things get real, folks. The Problems You Don’t See Coming You know how it goes. You’ve got your antenna hooked up, the feedline is properly installed, and you’ve got a bunch of adapters for antenna setups to get everything connected just right. But in the back of your min...
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What Most Operators Learn Too Late About a UHF Antenna Switch

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  Let’s get real here. Anyone who’s spent time in the world of ham radio has likely struggled with antenna switching at some point. Whether you’re a seasoned operator or still figuring out your station, antenna switches can either be your best friend or your worst nightmare. I’ve been in both situations, and trust me, there’s a lot to learn—usually the hard way. When you’re setting up your station, everything looks great on paper. You’ve got the gear, the antenna, the perfect frequency—you’re all set. Then you flip the switch, and out of nowhere, your signal drops, you hear static, or your SWR goes haywire. At that moment, it’s easy to think your antenna is the problem, right? Nope. More often than not, it’s the antenna switching setup that’s causing the headaches. Why Some Antenna Switches Fail, and How It Can Sneak Up on You I’ll be honest here: the first time I bought an antenna switch, I had no idea what I was getting into. I was sold on a flashy, inexpensive manual antenna sw...
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