Testing the popular fiberglass antennas showed some brands insert losses, like a dummy load, to make their antenna look good on the SWR meter, but sacrificed most of the power gain.
Wilson designed the Silver Load, with its exclusive impedance matching transformer, to give good SWR without sacrificing power gain. Additionally, using spaced windings on the top load to eliminate the dielectric losses, and silver plated wire for maximum radiation, Wilson has the best performing fiberglass antenna available.
Tested by Dr. Dwight Heim
Dr. Dwight Heim, ( PH.D. Electrical Engineering, Professor Emeritus, University of Michigan ) an independent consultant, conducted a test and comparison on some of the fiberglass antennas used by truckers. The graphs below indicate the results of this comparison test.
PERFORMANCE GUARANTEE: The Wilson Silver Load FGT fiberglass antenna will outperform the fiberglass antenna it replaces or your money back. This guarantee is good for 15 days from the date of purchase at the original purchase point only, and with dated sales receipt.
ANTENNA POWER GAIN : the amount of improvement in power amplification over another antenna. The higher gain antenna will transmit & receive farther, but the actual distance will vary depending on the gain, ground terrain and other environmental factors. Individual test results may vary due to the vehicle's ground plane and matching configuration.
EXAMPLE :The Wilson X has 20% more power gain at 27.185 MHz than Brand X antenna. This means that if the Wilson transmits 100 watts of power, then Brand X will need 120 watts of power to have the same signal strength at the receive end.