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4:20 PM
in Electrical Engineering, 5 hours ago, by A. B.
Apparently, old-fashioned spark-gap radio transmitters are now illegal because they cause interference across a wide band of wavelengths. But, it seems like, an arc welder is also a spark gap. Anyone here happen to know, do they not cause an interference problem, and, if not, why not? Less power? It seems like, they look like a lot of power :-D
 

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