antenna ball

For the ham radio operator on my gift list…

antenna topper turned 9x20 lathe aluminum

After eyeballing the spherical shape using a mixture of cutting tools, rasps and files, I wet-sanded the tool marks off and polished it with red and green compound. Then I parted it off (pictured above) and drilled the mounting hole. I was going to measure the sphericity I got by eye but decided I’d rather not know.

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