📌 INFORMATIVA COPYRIGHT — I diritti appartengono al legittimo proprietario. Fonte: onallbands.com — 🔗 Leggi l'articolo originale

If you stopped by to see the latest from DX Engineering at Dayton Hamvention® 2026, it wasn’t hard to spot the Momobeam booth at the end of one of DX Engineering’s rows in Building One at the Greene County Fairgrounds and Expo Center in Xenia, Ohio—especially if you were in the market for a high-performance HF directional antenna.

Why was this premier amateur radio provider from Sicily, Italy, positioned so close to DX Engineering? Well, it wasn’t by accident. DX Engineering began selling Momobeam’s world-renowned Yagis; end-fed wire antennas; and choke baluns, RF chokes, and RF choke line insulators through an agreement with the company in 2025.

“Momobeam antennas are trusted by amateur operators everywhere for improved contesting, optimized DXing, and an exceptional on-air experience,” said Tim Duffy, K3LR, DX Engineering CEO. “DX Engineering is excited to bring these finely engineered and well-built antennas to our customers. Our team looks forward to a long and successful relationship with the professionals at Momobeam.”

Here’s a summary of the three Momobeam HF directional Yagis that drew attendees to their Hamvention booth:

• PENTA10 Five-Band HF Yagi: This popular antenna offers a compact footprint while delivering full-size performance across 20, 17, 15, 12, and 10 meters—all through a single feedline. Optimized element spacing ensures exceptional gain, directivity, and on-air results. Plus, enjoy long-term durability and a clean, professional appearance.

Quick Specs: 10 elements, 12.8-foot boom length, 19.35-foot turning radius, 10kW power handling, 3kW RF choke balun included.

• DUO7 6/10M Dual-Band HF Yagi: This Yagi for 6 and 10 meters has an antenna boom length of 6.88 feet and weighs only 17.6 lbs., making it ideal for portable operations and installations where space is limited. Enjoy hassle-free setup with no calibration and excellent performance, with SWR below 1.5:1 across both bands. Its no-compromise design has seven elements fed through a single feedpoint.

Quick Specs: 9.84-foot turning radius, 10kW power handling, no balun included.

• Mono3-6P 6 Meter Yagi: This antenna for operation on the Magic Band weighs only 4.2 lbs. and has a boom length of 3.6 feet. Its field-ready design makes it perfect for POTA and SOTA activations. It offers impressive gain, excellent front-to-back performance, and a flat SWR curve of less than 1.5:1 across the 6M band. Designed for rapid deployment, it uses wing nuts to enable fast, tool-free assembly and disassembly.

Quick Specs: 3 elements, 5.6-foot turning radius, 3kW power handling, no balun included.

Mark Pride, K1RX, Momobeam North American representative,

graciously took a few minutes with OnAllBands to discuss the world-class mechanical design elements that separate Momobeam’s directional antennas from the competition.

“One of the major elements in the mechanical design is we use a square boom,” said K1RX. “With a square boom_, depending on the type of antenna, if it’s a large multi-element Yagi it might be a four-inch size or less, like a two-inch for the Penta. The square boom in combination with stainless steel hardware and the precision-machined components really does differentiate us from all the other people out there.”

“Something also to note is the plates that hold the elements to the boom. The bolt holes are set up such that when you put a bolt right next to the wall of the square boom, there’s no gap, so it eliminates any kind azimuth type of rotation off the boom. And if you put the plate on wrong, you’ll end up with a situation where the bolt holes don’t line up and you’ll know immediately that, okay, that’s not done properly. But the instructions are such that it’s very clear that you won’t make that mistake.”

“There’s high-quality UV-rated materials on the insulators for all the elements. Elements are suspended below the boom, which is probably the best mechanical method for mounting elements.”

“There’s properly telescoped tubing. The mounting of the elements, the way they’re connected through the telescopic plate, is we use a single bolt—stainless steel—and the outer tubing has a larger diameter than the inside tube. The objective there is you want to be able to pull one wall of that tubing against the other, as opposed to trying to put a bolt through the entire element. What happens is you end up with a loose element. It doesn’t quite compress, but by having a larger hole where the head of the bolt will actually sit, it causes the two walls to compress with no issue at all.

“So, you have an excellent electrical connection. And, of course, that in combination with Penetrox or a conductor grease, which DX Engineering sells, it’s again another perfect marriage. That’s a good recipe for success.”

Also, take a moment to watch this video of Mark, K1RX, being interviewed by Tim, K3LR:

The post A Few Words from Momobeam about the Mechanical Design of Its HF Directional Antennas appeared first on OnAllBands.