I’m often asked how to make a dipole. In this video I use materials on hand to build a 40-meter amateur radio dipole. I hung it on the antenna test rig I built this past week, and it works great! Lots of work, though. Although dipoles are available for far less than $100, I made this one for zero!
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I have several wire antennas ready to test, but needed a couple masts. This video describes how I used chain-link-fence top rail together with pulleys and guy rope to set up the “test range.” This is an easy technique you can use to set up a dipole when there are no ready supports.
Here’s a new approach. For the first time on an Ask Dave video, I’m focusing on an interview! In this case it’s with Ray Nelson, N1MPD, who with his wife own USA Coax (www.usacoax.com, or www.coaxusa.com, or mpddigital). Ray’s an expert on coax and on the many types of connectors available, and his business caters to both amateurs and commercial users. Learn about coax!
I moved my little QRP Labs Ultimate3 WSPR transmitter from 30 meters to 20 meters, which involved building the kit for the 20 meter low pass filter. Follow along as I step through the process, stopping for a moment to really detail how to wind toroids. It’s now up and works: check for ke0og on wsprnet.org.
Unboxing the not-yet-released Radioddity GD-77, their “try again” DMR Tier 1/Tier 2 radio. I describe many of the promised features. It’s both analog and digital, and operates on both 2 meters and 70 cm. I should have the programming software soon. It comes with a programming cable.
Here we are again, looking at the Chinese Radioddity GD-55+. The PLUS indicates they’ve made mods to solve the Slot 1/Slot 2 controversy. My testing indicates they’ve certainly gone a long way. They now cleanly transmit in only one time slot at a time. I leave it to others with more sophisticated test equipment, and as we have no DMR repeater near here, others can test for compatibility with standard DMR repeaters. I suspect I’ll get lots of comments!
Here’s an answer to a question I’ve been asked many times: what’s my station antenna? The answer is a Butternut HF-9V, a ground-mounted vertical with radials. This video explores how I have my antenna set up.
Hams can use the PremWing FD-094B HDTV receive-only antenna for 2 meters and 70 cm. It’s surprisingly effective, giving me several SD and HD channels from Grand Junction, about 70 miles away as it bends over a couple mountains. You can find it at Amazon at https://www.amazon.com/dp/B01N11V1HH.