Using CHIRP as our guide, let’s look at all the different stuff you need to understand before you set up your VHF/UHF handheld or mobile. We look at frequencies and offsets, CTCSS tones, simplex vs duplex, and much more. Thanks to Joy McLemore Rabins for the question that led to the video.
This week’s video takes a close look at the MFJ-9232 QRP loop antenna. Given sizes of components and all, it is rated to handle no more than 25 watts. It can be used both indoors and out. This is a great little adjunct to those who want to play with (er…I mean “study”) loop antennas.
This turned out to be one weird antenna. It’s an end-fed multi-band antenna that’s best used in a portable environment. I had to get MFJ’s help to figure out what was going on; I provide all this info in the video. This is the summer of antennas! I learn new things every day! (I skipped a number–#88 is coming).
These are both 20 meter single band wire antennas (also available for other bands). This video reviews the “how it works” followed by tests for each, and explains how I got the Zepp to work. I particularly like the collinear (and, yes, it’s spelled with two L’s), which performs significantly better than my station vertical.
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!
You can see a list of Ask Dave videos by clicking here. You can ask a question by clicking here. You can go to my YouTube channel by clicking here. And the tip jar is available by clicking here.
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.