ITEM L-109AIRPORT TRANSFORMER VAULT AND VAULT …

The antenna shall be equipped with an integral gap-type lightning arrester. The coaxial cable shall be 50-ohm, type RG-8. Antenna shall be designed to mount on 1-inch pipe support. The antenna ground planes shall be a minimum of 4 feet above the top of the adjacent roof or structure. Antenna mountings shall be fabricated as shown and noted. ................
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