SteppIR BigIR Mark IV Vertical Antenna, 40m-6m Package
SKU Part Number: 00417-SPS-PACKAGE-09762+06021
Included in this package: 1 x BigIR Mark IV Vertical Antenna 1 x OptimizIR Controller 1 x 80m Coil   What is the OptimizIR?: The OptimizIR...
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£3,499.99 £2,916.66
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Included in this package:

1 x BigIR Mark IV Vertical Antenna

1 x OptimizIR Controller

1 x 80m Coil


What is the OptimizIR?:

The OptimizIR includes all of the standard features that the SDA 100 offers and in addition offers a larger full-color display, enhanced GUI, can be used on ANY SteppIR antenna, and has the capability for the user to import created antenna models. Since this controller has the memory to store extra antenna models, SteppIR has gone ahead and modeled some cool yagi antennas including a max gain, max f/r, and wide beam antenna. These come stock on the OptimizIR for use straight away, and are viewable on a full color “power band” so it is easy and intuitive to visually determine the gain/FR weighting on the antenna model.

80m Coil:

Attaches to base of the BigIR vertical, expanding coverage to the 80m/60m bands. Power limit of 1kW for 80m/60m, 3kW on 40-6m. Additional 4 conductor cable required when adding this option Click Here.

Why buy SteppIR?


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.



  • 40m-6m continuous coverage
  • 80m-6m coverage with optional coil
  • 32 ft length
  • 15 lb total weight
  • 2 sq ft wind load
  • EIA-222-C wind rating when guyed
  • EHU high wind reinforcing and 1.5”mounting pole


Weight 15 lb / 6.8 kg 22lb / 9.9 kg
Wind Load (EIA-222-C) 1.9 sq ft / 0.17 sq m -
Longest Element 33 ft / 10.05 m -
Power Rating 3kW 1kW on 80m and 60m
Frequency Coverage 6.8 - 54 mHz 3.5 - 54 mHz
Cable Requirements 4 conductor 2x 4 conductor
Tuning Rate 1.33 ft/sec - 0.4 m/sec -
Wind Rating (guyed) 70 mph w/ 1 Guy Set -
Wind Rating (guyed) 100 mph w/ 2 Guy Sets



We have several shipping options for our products, including next-day and Saturday/Sunday delivery for certain items. Please see these options at checkout.


If you have any equipment that needs to be returned to Martin Lynch & Sons, please fill out the form below:

Click here for returns form

Upon receipt of goods you have 14 days to return goods however the goods must be returned in original packaging and care must have been taken with the goods you wish to return. Under distance selling regulations you are not entitled to any refund on carriage charges or modification charges made at your request. Large items cannot be returned if they have been assembled, unless faulty.

Warranty Terms and Conditions

Outside of the 14 faulty return period, returned items cannot be accepted, unless covered by manufacturer's warranty. We will repair as much as possible on site however in exceptional circumstances products may have to be returned to the manufacturer of distributor.

For repairs/replacements under manufacturer’s warranty for any item please download a ML&S return form from the link above and return to ML&S with the faulty product.

International Warranty information

Warranty service for items we sell is available in the U.K. only, unless otherwise noted. It is your responsibility to pay freight for returned items to the U.K. and back to you for desired warranty coverage. All of our NEW products come with a minimum 12 month warranty, (Yaesu & Icom 24 months), with up to 90 days on second-hand equipment. Items returned for service must state "returned goods for repair" on the return air waybill or U.K. import customs duties apply and will be added to your invoice. For more info about returning items please contact our customer help desk, [email protected]