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When attaching the struts to the tower members, position the struts parallel to the antenna axis. This provides maximum stability during wind loads. If the tower configuration does not permit parallel positioning, the struts can be positioned anywhere within a maximum devalation angle from the antenna axis as shown in Figure 13. The two struts can also be positioned so that the sum of their angles does not exceed 50°. However, the fixed strut must have the larger angle, but must not exceed 35°. 10.2 Azimuth Strut Assemble the azimuth adjustment parts and strut clamp assembly and slide them onto the free end of the azimuth strut as shown in Figure 11. Position the two azimuth adjustment nuts so that they are at the midpoint of the azimuth bolt threads. Tighten the U-bolt and clamp assembly setscrews only enough to prevent the assembly from sliding off the strut. Swing the antenna into alignment with the transmission path. Position the strut clamp assembly on a tower member and drill a mounting hole. Loosely attach the clamp with a bolt, lock washer, and nut as shown in Figure 11. A 33984-7 adaptor clamp (not supplied) can be used to attach the strut clamp assembly to a round tower member as shown in Figure 14. Do not tighten the setscrews, jam nuts, or mounting bolt of the strut clamp assembly until both elevation and azimuth adjustments have been completed. 10.3 Fixed Strut Slide a strut clamp assembly onto the free end of the fixed strut. Position the strut clamp assembly on a tower member and drill a mounting hole. Loosely attach the clamp with a bolt, lock washer, and nut as shown in Figure 12. A 33984-7 adaptor clamp (not supplied) can be used to attach the strut clamp assembly to a round tower member as shown in Figure 14. |
Do not tighten the setscrews, jam nuts, or mounting bolt of the strut clamp assembly until both elevation and azimuth adjustments have been completed. positioning the concave elevation adjustment nuts to tilt the antenna upward or downward (see Figure 4. Adjust azimuth by positioning the azimuth adjustment nuts on the azimuth strut to move the antenna to the right or left (see Figure 11). Alternate elevation and azimuth adjustments may have to be done several times before they are satisfactory. Then, carefully tighten the adjustment nuts without disturbing the adjustments. Also tighten the jam nuts on the elevation assembly and the small U-bolt on the azimuth assembly. Carefully tighten the remaining loose hardware in the following sequence:
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