SteppIR Verticals are the only true ¼ wave continuous coverage antennas available for the HF bands.
The SteppIR technology has had a profound impact on improving vertical antenna performance over that of traditional designs – there is no substitute for having a true 1/4 wave vertical on every frequency within the coverage range, without having to “trick” the antenna into being resonant. Being able to adjust the length of the element allows the SteppIR vertical to be mounted nearly anywhere and still provide a good match to your transceiver. As with all ¼ wave verticals, ultimate performance depends a good radial system. SteppIR verticals can be ground mounted or elevated above ground.
Big IR / Small lR Specs Specifications BigIR 40-6 Vertical Small IR 20-6 Vertical Weight 15 lb / 6.8 kg 12 lb / 5.4 kg Wind Load 1.9 sq ft / 0.17 sq m 1.0 sq ft / 0.9 sq m Longest Element 33 ft / 10.05 m 18 ft / 5.49 m Optional Coil Yes – 80 m Yes – 40 m or 80/40 m Power Rating 3kW (1.5kW w/80 m coil) 3kW (500W w/80 m coil) Wind Rating 100 mph w/2 Guy Sets/h 100 mph Frequency Coverage 6.8 – 54 mHz 13.8 – 54 mHz Cable Requirements 4 conductor (8 with coil) 4 conductor (8 with coil) Tuning Rate 1.33 ft/sec – 0.4 m/sec 1.33 ft/sec – 0.4 m/sec Un-guyed Wind Rating 50 mph 100 mph