User manual BARKER & WILLIAMSON AT-55 TRAP ANTENNA

[. . . ] BARKER & WILLIAMSON 603 CIDCO ROAD COCOA, FL 32926 321-639-1510 MODEL AT-55 ANTENNA 40, 20, 15 and 10 Meter Bands Power Rating: 1000W PEP, 500W Output Length: 55 Feet The Barker & Willamson Model AT-55 is a short dipole for the 40, 20, 15 and 10 meter amateur bands. The 40 and 20 meter bands have a seperate trap (20 meters) which will give maximum efficiency and still be a short antenna for small lots and limited space. [. . . ] It is imperative to follow the instructions step by step, in the order shown, to achieve satisfactory results with your antenna. (2) Remember that throughout the assembly procedure, wire lengths are always to be symmetrical on both sides of the antenna. The wires must be cut approximately 2 - 3 feet longer than the dimensions shown in figure 1. Here are the lengths that you should cut (including the 2 - 3 ft extra). Remember, you can always trim the wire shorter after tuning, but once cut too short . (4) Attach one end of the wire segments in the permanent manner shown in figure 2, working out from the center conductor. Allow roughly 6 to 8" of wire through the eyebolt before starting your wrap. Attach the 19' 6" segments to both sides of the center connector. (5) Now assemble the sections of the antenna together paying attention to figures 1 and 3. The wire segment lengths shown are your starting point for tuning the antenna. This will leave each wire segment with one end permanently soldered, and the other end temporarily connected for adjustment. If the resonant frequency is low, shorten the 16' 8" segments. [. . . ] We reserve the right to make changes in design at any time without obligation to update previously manufactured models. This warranty is given in lieu of any other warranty, expressed or implied. [. . . ]