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Sounds a lot of hassle and expensive coax just to change TOA ...i think i would just switch the mast in or out ...a mast normanly when connected to the bottom of the antenna makes the antenna think its longer than it is and buggers up the patten and puts the TOA upwords ...try modeling a I10K say at 10 meters high with no mast and then with a mast and see what happens.....

[QUOTE="davev8, post: 699594, member: 19379"] Sounds a lot of hassle and expensive coax just to change TOA ...i think i would just switch the mast in or out ...a mast normanly when connected to the bottom of the antenna makes the antenna think its longer than it is and buggers up the patten and puts the TOA upwords ...try modeling a I10K say at 10 meters high with no mast and then with a mast and see what happens..... [/QUOTE]

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