CrankIR Series Antenna Vertical

 

Steppir Antenna 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.

Vertical Specifications

Specs	BigIR	SmallIR
Element Length	33 ft / 10.05 m	18 ft / 5.49 m
Minimum suggested radials (for ground installations)	12	12
Weight	15 lb / 6.8 kg	12 lb / 5.4 kg
Wind Load	2 sq ft / 0.19 sq m	1 sq ft / 0.9 sq m
Wind Rating	0 guys: 50mph / 80kmh 1 guy: 70mph / 112kmh 2 guys: 100mph / 160kmh	100mph / 160 kmh
Adjustable Elements	1	1
Power Rating	3 KW	3 KW
Frequency coverage	6.9 – 54 MHz	13.9 – 54 MHz
Tuning Rate	0.7 ft per second	0.7 ft per second
Control Cable	4 wire 22 AWG shielded	4 wire 22 AWG shielded

BigIR and SmallIR Coil Option

Specs	BigIR 80m coil	SmallIR 80m coil	SmallIR 40m coil
Ham band coverage	80m, 60m	80m, 60m, 40m, 30m	40m, 30m
Power rating	1500w	500w (80m, 60m) 1500w (40m, 30m)	1500w
Dimensions	9.5″w x 14″ h x 7″ deep	9.5″w x 14″ h x 7″ deep	9.5″w x 14″ h x 7″ deep
Weight	4.5 lb	4.5 lb	4.5 lb
Additional Cable requirement	4 wire 22 awg shielded	4 wire 22 awg shielded	4 wire 22 awg shielded

 

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