SteppIR BigIR Mark IV Vertical Package (SDA 100 Controller)



BigIR Mark IV Vertical Antenna Package, 40m-6m

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.

  • Package includes:
    • DB25 Cable splice
    • Two Guy clamps
  • Total price of included package components:$505.00

    • 40m-6m continuous coverage
    • 32 ft length
    • 15 lb total weight
    • 2 sq ft wind load
    • EIA 222C wind rating when guyed
    • Comes with SDA 100 controller (now includes ALP, Tranciever I/F and Tuning Relay) **
    • EHU high wind reinforcing and 1.5”mounting pole
    • Does not include optional 80m coil

    ** The SDA 100 electronic controller is our basic antenna controller and includes standard the Advanced Lightning Protection (ALP) module, transceiver interface, and the tuning relay. This is our “tried and true” electronic controller which gives control over the antenna including the normal, 180 degree, and bi-directional modes.

    OPTION: 80M Base Loading Coil for the BigIR Mark IV Vertical: Add $945.00

    Attaches to base of the BigIR vertical, expanding coverage to the 80m/60m bands. Power limit of 1.5kW for 80m/60m, 3kW on 40-6m. Additional 4 conductor cable required when adding this option.