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The antenna is > halfway long and is voltage fed so you don't need a ground wire. Insulating the pole isn't sufficient as you'll have capacitive coupling. Just run the coax away from the pole instead of securing it to it. And use a RF choke at the antenna feed point, preferably one made with a ferrite core rather than an air wound coil of coax.

[QUOTE="M0GVZ, post: 502207, member: 22312"] The antenna is > halfway long and is voltage fed so you don't need a ground wire. Insulating the pole isn't sufficient as you'll have capacitive coupling. Just run the coax away from the pole instead of securing it to it. And use a RF choke at the antenna feed point, preferably one made with a ferrite core rather than an air wound coil of coax. [/QUOTE]

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