On Tuesday, March 4, 2014 10:19:49 AM UTC-6, W5DXP wrote:
On Tuesday, March 4, 2014 5:22:18 AM UTC-6, Jeff wrote:

Also do not neglect the (considerable) capacitance of the vehicle body

ground to the the real ground.



I was on the top uncovered story of a three-story parking garage made of concrete and steel and the weather was dry.

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73, Cecil, w5dxp.com

Makes sense to me. You had a 4 ft wide solid metal appx 1/4 wave
radial system in the forward direction. So what was below the truck
shouldn't have really mattered much. Or at least in that direction.
Which is the whole point of having a dense "radial" system below
a low vertical. And even more critical with a low short vertical.

His is a 7m fishing pole fed with a auto tuner. Would be short on
40 and 80. I bet adding a few top loading wires would help on those
bands, but that's probably out of the question if he can't string up
dipoles and such. Maybe make some "L" spokes to clamp on the top with
a hose clamp. A wire connecting the outer ends of the spokes would be
even better. Would improve the current distribution. Or could add a
center loading coil for 40 and 80. That would help if no top loading.