Roy Lewallen wrote:
I don't see any information at that web site about the type of vehicle.
Since the vehicle radiates an amount comparable to the antenna, it can
have a profound effect on the overall field strength. Were all those
antennas mounted on the same type of vehicle?

Those are averages, Roy, not associated with any particular
vehicle. The average screwdriver beats the average hamstick
on 75m. Using similar antennas, the larger vehicles (GMC
pickups) usually beat the smaller vehicles (Honda Civics).
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73, Cecil http://www.w5dxp.com