The RHF Single Band HF Mobile Antenna fitted with 3/8th thread is of high quality, heavy-duty, slimline construction. They have been purpose-made for the HF ham radio bands 160, 80, 40, 30, 20, 17, 15, 12, 10, 6, 4, and 2m. They are designed to operate on the phone portion of the band, bandwidth and VSWR will, of course, vary according to the mounting location. VSWR at resonance should be 1.5:1 or less when properly matched. The whip is field tuneable for the lowest VSWR and double-locked with stainless steel grub screws. If you require greater bandwidth, an ATU may be required. Heavy gauge copper wire is used in the construction of the resonator and this wound onto a fiberglass mast and finished in sleek black. The fittings are chrome and the 1.2m (4ft) long stainless steel whip that fits into the resonator ensures that the antenna not only works extremely well but also looks very smart.