Hello all,
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I'm clipping an onto a W2LI magnetic loop antenna. I'm puzzled by something: the point at which it shines brightest is consistently about +20 kHz above what a NanoVNA (and the transceiver) indicates is the bottom of the SWR curve (on 40M).
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What explains this? Is this a case where lowest SWR isn't necessarily where the maximum RF radiation is? Defective unit (would love to know what's inside)? User error?
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Thank you!
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-Todd
Todd - KE2AEQ