After that was done the rest went together very quickly. The hardest part of the installation was to dig the 3-4 ft hole for the 5 ft water pipe antenna support and pound in the ground rods. He answered all my questions promptly and I had no problems installing this vertical. Tom provides outstanding customer support. Will not heat up or saturate at like many of the "less expensive" designs.Excellent 10-40M Ant, easy to install, great support NEMA rated 4x marine grade junction box for outdoor installations.Ĭover utilizes integral neoprene gasket for weatherproof integrity.ĭimensional Drawing of Standard Enclosure SO-239 connectors are silver plated with Teflon insulation.Īlternate connectors and Mounting Options are available in the Accessories section.
Windings are inserted into Teflon tubes increasing total breakdown to 10,000 volts.ġ to 35 MHz - 5kW into resonant load, 35 to 54 MHz - 3kW. Single bifilar winding of 14 gauge Heavy build polyamideimide Allex 240 Winding Wire. Stacked cores with single bifilar wire pair wound as 4:1 unun.ĭownward impedance transformation by factor of 4. SpecificationsĬustom mix low permeability ferrite by Fair Rite Products for maximum bandwidth.Ĭores are coated and sealed for long term durability. They will not work with balanced designs such as dipoles or loops and use with a balanced antenna may cause erratic operation and/or damage to the unit.
Ununs are intended for use with unbalanced antennas such as verticals and long wires. In a temporary or emergency situation, a single counterpoise can be used when cut to approximately 1/4 wavelength of the lowest operating frequency. If a lower power version is desired, please see our model 4132.Īlthough many customers report very good performance using just a single ground rod, the best performance will come from using at least 4+ ground radials or several elevated radials. This unun is an excellent match for any of the 43 and 31-33 foot multiband verticals including the S9, ZeroFive, MFJ and DX Engineering vertical antennas allowing the use of full legal limit ++ power. Works well with both internal transceiver and external antenna tuners. Utilizes stacked cores to deliver efficient broadband performance and high power rating across all HF frequencies. Heavy duty 5kW, 4:1 unun designed for use with wire verticals, long wires and multiband monopole verticals.
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