Experiments have been done since "ancient" times with multiple detectors. I believe in most cases little or no advantage was found when using more than one detector at a time in some rectifying circuit. On advanced sensitive sets, often several samples of detector are tried to find the "hottest" one. Some have used a switch to go between two diodes, to pick the more sensitive one. Then that one would be compared to another, and so on going through the stock of detector diodes.
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Reece
Perfection is hard to reach with a screwdriver.
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