FORMAL COMPARISON TEST AMT5000 / 3000
Posted on October 17, 2011
In the first tests comparing our AMT3000 with the new AMT5000 we discovered that the AMT5000 out performs the AMT3000, but we also recognized that our methods needed better organization. These are the New Formal Tests.
Test Date / Time / Temp: Monday October 17, 2011 Between 11 AM and 12 Noon, Farenheit Lower 50s;
AMT3000 received with grade A signal to a point 435 feet from transmitter;
AMT5000 received with grade A signal to a point 643 feet from transmitter;
The auto radio followed a straight line street in front of neighborhood housing;
The same antenna was used for both transmitters, located in the rear of the house, therefore the received signals came from back behind the buildings, not line of sight;
The transmitters were located indoors on an extended window sill 21″ above the floor, grounded to a single long heavy gauge copper wire that exits the house at ground level and is buried in a southerly direction going uphill;
The RF output of the transmitters are attached to a 4.5′ aluminum window frame with indoor attached vertical wire from window to baseboard and outdoor vertical wire from top of window to overhang. Total antenna length 10′;
The AMT3000 was attached directly to the antenna array;
The AMT5000 was attached to the antenna array with a 20 pF ceramic capacitor to compensate for capacitance;
The AMT5000 was set for output to final of 99 mW.
ANECDOTAL COMMENTS: In a previous test the AMT5000 had been set to 113 mW for one trial, and to 105 mW for another, and the differences in distance were noticeable in feet.
By reasonable estimates the achievable distance would increase substantially with a well installed outdoor antenna.
CONCLUSION: The AMT5000 lives up to its Specifications and is a Professional Class Transmitter.