Home › Forums › temp › New SSTRAN AMT5000 High Efficiency Transmitter Preview › Suggestion for Efficiency Measurement
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It would be great if there is a measurement of efficiency which could be compared to other “internal loading coil” transmitters or just to establish a benchmark. I suggest attaching a series C (low loss mica or air variable) and R (2W composition works well) from the antenna output to ground with the circuit tuned to resonance. Reasonable values to simulate an antenna system would be R = 27 ohms and C = 27 pF. The DC input power is then measured with the load connected and the power delivered to the dummy R load will be Vrms^2/R with Vpeak read by means of an oscilloscope and converted to Vrms for the calculation.
Though not an exact predictor of efficiency with a real antenna system this would at least give some standard basis for comparison.
What do you think?