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Before we reached an agreement with Sirio to custom manufacture our FM antennas, I use to make them all by hand from copper tubing. The bottom ends of the radials were flattened and formed around the radiator. I soldered the radials directly to the radiator and this worked perfectly in terms of matching and gain. NEC suggests that a drop in gain will be seen if the spacing is beyond about 1 inch at the base. The more you move the radials out at the base the more the design mimics the skeleton monopole. Which interestingly claims to have no gain over the standard J-Pole.

[QUOTE="Shockwave, post: 226150, member: 10882"] Before we reached an agreement with Sirio to custom manufacture our FM antennas, I use to make them all by hand from copper tubing. The bottom ends of the radials were flattened and formed around the radiator. I soldered the radials directly to the radiator and this worked perfectly in terms of matching and gain. NEC suggests that a drop in gain will be seen if the spacing is beyond about 1 inch at the base. The more you move the radials out at the base the more the design mimics the skeleton monopole. Which interestingly claims to have no gain over the standard J-Pole. [/QUOTE]

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