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Trombone variable capacitor (coaxial capacitor) and Magnetic Loop antenna

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Dean Sanders
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Trombone variable capacitor (coaxial capacitor) and Magnetic Loop antenna

In a Magnetic Loop HF antenna, is the trombone variable capacitor considered a part of the secondary loop (conductor), and just the Stators are connected to both sides of the interrupted loop, or are the Stators connected to one side and the Rotors connected to the other. And, in a vacuum variable capacitor, it looks like the Stator is connected to one side and the Rotor to the other side. Correct?

Thanks,

Dean Sanders