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I agree with SP5IT, no need to.

The antenna radiating part is aleady isolated from the U bolt bracket , this bracket is where ground radials go.

The metal mast provides a D.C.ground and your polyphaser will break the coax ground shield for extra protection from nearby strikes or high static discharge. Be sure to use at least one 8ft ground rod and preferably attach it to the polyphaser. 3 ground rods are better though.

Use a 1:1 balun or make one from coax just like you see in the above pics. This should keep common mode stray RF from traveling down the coax to your shack.

If you do all that, you shouldn't have any issues.

Can u get your antenna up to 36ft at the base?

[QUOTE="fourstringburn, post: 595935, member: 2920"] I agree with SP5IT, no need to. The antenna radiating part is aleady isolated from the U bolt bracket , this bracket is where ground radials go. The metal mast provides a D.C.ground and your polyphaser will break the coax ground shield for extra protection from nearby strikes or high static discharge[SIZE=16px]. Be sure to use at least one 8ft ground rod and preferably attach it to the polyphaser. 3 ground rods are better though. [/SIZE] Use a 1:1 balun or make one from coax just like you see in the above pics. This should keep common mode stray RF from traveling down the coax to your shack. If you do all that, you shouldn't have any issues. Can u get your antenna up to 36ft at the base? [/QUOTE]

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