User manual BARKER & WILLIAMSON ALL BWD AND BWDS BROADBAND FOLDED DIPOLES

[. . . ] Features include a high impact plastic housing for the balun and matching network. Feedline impedance is 50 ohms and comes equipped with an SO-239 (female) coax cable connector. Other connector options such as N are available from the factory. The antenna may be installed as a flat-top, inverted Vee or a sloper. [. . . ] Less height does not disqualify operation, but may require a tuner on the lowest frequencies. Also, propagation may be reduced with inadequate height on the lower frequencies. (3) This is a non-grounded antenna, so surrounding "grounded objects" try to absorb your radiated wave on low frequencies. This may result in poor SWR, and/or poor signal reports. "Grounded objects" include metal towers/poles, roofs, gutters, trees, and the ground itself. When supporting from metal towers/poles, step off (or up) from the metal with a wood or PVC support arm 3 to 5 feet. Avoid crossing over roofs when possible. When using trees for supports, try to stay clear of the branches. (4) When installing in an attic or close to a roof, remember that power line and conduit/pipe runs become antennas that may cause coupling problems at certain frequencies. Attempt to stay perpendicular to such objects. Always keep the balun and balancing network hanging in the air with proper support such as an FDMK, away from wood and insulation to avoid fire hazard. Examples are RG-8 (thick), RG-213, 9913. Over 50% of installation problems are coax/connector problems. Check your feedline (including new ones) with a dummy load placed at the antenna end of the coax. Transmit into the dummy load and check for 1:1 SWR on all bands. Do not substitute an analyzer for this step. Thin coax such as RG-8X may be used up to 20 watts. (6) The location will usually be determined by trade-offs of height, available supports, and interfering objects. Sometimes, multiple trials may be necessary to judge which installation is best. Unfortunately, HF is difficult to predict. Usually, adequate height is favored over other parameters. (1) 2/05 (7) Remember that the highest amount of energy is radiated at a right angle to the antenna wire, the minimum off the ends (when the antenna is parallel to the ground). Consider this when selecting map orientation for your antenna. [. . . ] Only use a sufficient length of coax to reach the station (9) Your antenna is ready for operation. It is broadband and pretuned at the factory for an average SWR of 1. 4:1 to 2. 0:1 in HF depending upon the frequency used and surrounding objects, ground conditions, etc. You may find that in extremely bad locations the use of an antenna tuner will be helpful. SWR of 2:1 to 3:1 should be expected on 6 meters without a tuner. (2) (3) WIND AND ICE SURVIVAL WIND 100 MPH 150 MPH WITH 3 POLE SYSTEM 40 LBS 80 LBS WITH 3 POLE SYSTEM ICE WARRANTY STATEMENT Barker & Williamson guarantees each product to be free from defects in material and workmanship for 90 days from date of purchase. [. . . ]