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2 Meter Slot-Cube Antenna (QST Jan 2019) K1AWC on 11/3/19
I built the antenna over the past couple of weekends and found that mine also was resonant at 152 MHz. I lengthened two of the horizontal pipe sections 1 1/4" each and the resonant frequency dropped to 146 MHz. The SWR is below 1.3:1 across the band.
I also abandoned the CPVC coupling for two copper end caps, this gives a little more metal to tap into for the coax connection.

I would also like to try this antenna as a mobile as suggested by AD6ZH, and would like to know if anyone has tried it over a ground plane.

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