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Pete Johnson's avatar

I built this and it had 10.5µH of inductance. With my CHA SS17 whip fully extended it had the lowest SWR at 6.645 MHz. I needed to collapse two sections to get it resonant on the 40m band. I backed out one full turn of the winding to get 8.9µH. I need to test this with my whip but I'm surprised with this result. I would have expected needing more inductance with a 17' whip.

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Pete Johnson's avatar

I built this and it had 10.5µH of inductance. With my CHA SS17 whip fully extended it had the lowest SWR at 6.645 MHz. I needed to collapse two sections to get it resonant on the 40m band. I backed out one full turn of the winding to get 8.9µH. I need to test this with my whip but I'm surprised with this result. I would have expected needing more inductance with a 17' whip.

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Bob Handwerk's avatar

Which type of Loctite would you suggest for this project?

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Gary Dusbabek KI5GRD's avatar

Sorry for the late reply. I'm sure anything will work, but I use the red 271.

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