User manual BARKER & WILLIAMSON AS-40 TRAP ANTENNA

[. . . ] BARKER & WILLIAMSON 603 CIDCO ROAD COCOA, FL 32926 407-639-1510 MODEL AS-40 ANTENNA 40, 20, 15 and 10 Meter Bands Power Rating: 1000W PEP, 500W Output Length: 40 Feet The Barker & Willamson Model AS-40 is a short dipole for the 40, 20, 15 and 10 meter amateur bands. Each band has a separate trap (20, 15 and 10 meters) which will give maximum efficiency and still be a short antenna for small lots and limited space. On 15 meters the 10 meter traps work as loading coils, and on 20 meters both the 10 and 15 meter traps work as loading coils keeping the antenna short for 20 meter operation. [. . . ] (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 two of the 11' segments to both sides of the center connector. Attach the other two 11' segments to one side of the TR20A traps. (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 inner 8' 5" segments (attached to the center connector). After the desired frequency is achieved, make permanent attachment for these segments as shown in figure 2, trimming off excess wire. (7) Next adjust the 13" segments for 15 meters in the same manner. [. . . ] Warranty is voided if product is subject to misuse, neglect, accident, improperly installed or used in violation of the instructions furnished by us. 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. [. . . ]