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I looking for a Sunray probe for my ETRAC , but I'm very stimulated to selfmake , so the coil is wind over ferrite core or not ? so I measure my ETRAC coil and have two inductance around 900 uH in DD making .
In a coil stack design where is a formation? (coil nulling)
In a coil stack design where is a formation? (coil nulling)