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Summary of Contents for CUSHCRAFT ASL670
- Page 1 ASSEMBLY AND INSTALLATION INSTRUCTIONS ASL670 50 - 500 MHz Log Periodic Antenna 951494 (3/01)
- Page 2 MOUNTING The ASL670 mounting bracket accepts mast diameters to 2.5" (6.4 cm) O.D., but your antenna may be supported safely with 1.5" (3.8 cm) tubing. When installing multiple antennas on a single pipe, use a heavier mast with adequate strength to support the added load. Also, maximize spacing between antennas to reduce interaction.
- Page 3 013209 18-8 3-8”-16 x 4” (.95 x 10.16 cm) stainless steel U-bolt 035345 CableTie 030407 7/32” (.56 cm) stainless steel worm gear clamp ASL670BA ASL670 Boom Assembly ASL670EL1 ASL670 ELEMENT 1 ASL670EL2 ASL670 ELEMENT 2 ASL670EL3 ASL670 ELEMENT 3 ASL670EL4...
- Page 4 ASL670 1. Boom Assembly: Find two 6'-8" aluminum channels (BA). These form the boom and phasing line assembly. Align these back-to- back, spaced approximately 3/4" apart as shown in Figure-A Detail-1. Assemble as follows: Find two insulating spacer plates (92). Using 10-24 x 5/8" screws and #10 hardware, install one on each side of the boom at mounting holes provided between EL13 and EL14 toward the rear of the boom (see Figure-A, Detail-2).
- Page 5 ASL670 2. Log Periodic Element Mounting Pattern: FIGURE B: Staggered Mounting Pattern Each full element on the ASL670 consists Bottom of two half-sections. Each half-section is stagger-mounted. This means, if a half- Bottom element mounts in the top boom channel,...
- Page 6 ASL670 4. Installing 1/4” Threaded-Rod Element Sections: The remaining 24 half-element sections are made from 1/4" solid aluminum rod with one end back-threaded approximately 1". Before beginning installation, pair these rods according to length. ASL670EL12 will be the longest pair, and ASL670EL1 will be the shortest. While not adjustable over a wide range, the 1" thread on each allows minor length correction--as needed--to match the tip-to-rail lengths listed on element chart Figure-E.
- Page 7 ASL670 6. Antenna Mounting: The ALS670 is supplied with mounting hardware for horizontal or vertical polarization. For horizontal polarization, install the two U-bolt mounting clamp assemblies as shown in Figure G, Detail-1. When mounting the antenna horizontally, position the shield-side rail down and run the cable down the mast.
- Page 8 Cushcraft antenna is free of defects in material or workmanship. If, in the judgement of Cushcraft, any such antenna is defective, then Cushcraft Corporation will, at its option, repair or replace the antenna at its expense within thirty days of the date the antenna is returned (at purchasers expense) to Cushcraft or one of its authorized representatives.
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