When Would I Recommend a SteppIR UrbanBeam on an ALM-31 Tower?

I received the question that you see in the Title today (from Chris, KJ7I), and realized its a great Blog topic. Thank you Chris! Lets start with how the antenna works:       These are wonderful animated EZNec plots that are featured on Dan, AC6LA’s phenominal web site: https://www.ac6la.com/ The reason I searched for EZNec plots for the UrbanBeam is that I did not…

3B7A Worked With 100 Watts and the UrbanBeam (Long Path)

I worked 3B7A with 100 watts and the UrbanBeam (up only 35-ish feet) at o321z on 40M SSB The Long Path to 3B7A I tried using the DX Engineering DV-40-P, but they were barely audible. On the UrbanBeam – which would have a very high angle at only 1/8 wl up – they were Q5 and for about an hour. This is not a…

KY6R Antenna Plots (Featuring the SteppIR UrbanBeam)

Along with my Fluke DVM, my Rig Experts AA-30 has seen so much use and helped me with antennas and feed and phasing lines that it rates as my top tool in the ham toolbox. One of the best things you can do – after you tune your antennas at their feed point – is to run the analyzer at your feedline(s) in the…

3B7A 40M Propagation Study

0300z: DX Atlas says my path to 3B7 is 353 degrees SP and 173 LP. There is no way that I am hearing them on the Short Path at 353 degrees, so I must be hearing them on the Long Path. They have been weak except a really strong “burst” for maybe 5 – 10 minutes – and it is a grey line enhancement….

UrbanBeam on West Coast 40M Short and Long Path

This is a very interesting test. When I had the Cushcraft D40 up about 45 feet, on the morning Long Path, it beat the DX Engineering DV-40-P consistently to VK/ZL, ZS and all parts in between. During the night time Short Path, the 40M Phased Array always won. Last night – with the UrbanBeam up only 34-ish feet to ZS6CCY, this was certainly the…

UrbanBeam Up!

The UrbanBeam is up on the ALM-31 and everything works. I tested all bands and the SWR was 1.1:1 on the frequencies it tuned to. I made sure to put the KAT-500 on Standby. I also got the two 60′ Spiderbeam Fiberglass poles set up with clamps (you have to put rubber and heat shrink tubing on hose clamps and heat the heat shrink…

ALM-31 Up, UrbanBeam Built

The US Towers ALM-31 The tower is up, the G450 rotator is on top. The UrbanBeam is now completely built and I’ll wait until tomorrow since more showers are forecast for today. I’ll reserve final judgement once the UrbanBeam is on the ALM-31, but I do like it’s design, and the winch crank up and down feels quite nice. It’s very well made and…

KY6R Antenna “March Madness”

Two 60′ (18M) Spiderbeam verticals will go up next weekend – this weekend I will be laying down the last radials and installing the DX Engineering DV-80-P phasing boxes, feedlines and control cables. Since we are “Springing Forward” this weekend, I will most likely take down the 160M Inverted L later in the week after work – we will have a lot more light…

SteppIR UrbanBeam Assembly – Boom

One really fun thing about building the UrbanBeam is that I now have serious experience with Stepper Motors, specifically, NEMA-17 and NEMA-23. When I assembled and wired the boom with the two EHU’s I could see exactly what they did and what their Stepper Motors look like. I’m now in a holding pattern – it makes no sense to build the rest of the…

Why I Decided to Buy an UrbanBeam

Animated Model by Dan, AC6LA For quite a few years I have stayed away from SteppIR antennas. I actually had the 2 element yagi back in 2006, but started reading about problems with the Stepper motors or other associated hardware. I sold it and swore I’d only stick to aluminum because I could fix anything if it went wrong – and fix it very…