Why do (some) radio/antenna coils look like braided?

The video tells everything, say “sloppy” winding (braided wiring) has a substantial (read: good) effect to diminish the “natural capacitance” between the coil windings of a radio coil or whatever coil in the low frequency band: 20 KC-300 KC.

That is, of course, more/most important when the radio or other electronic frequency to be used is (say) low (20 KC-300 KC) and we have to need a lot of windings (e.g. 300 windings ape hair on a ferrite rod of 10-20 cm long and 0,9 cm diameter or 1 cm diameter) to get to a specific low frequency.

That ferrite rod (say ceramic) material must be made for these low frequencies (MW-LW), in general that is no problem and you can find them easily.

Keeping the “natural capacitance” low means that the resonance peak will be better, because a high L factor (=coil windings) and a low C factor (small parallel capacitor) gives in general a better Q (Quality factor) in a L-C setup where the C bridges the Coil. (C=capacitance and L= inductance).

Quality factor means a high resonance frequency peak to the frequency to which the coil is tuned.

Correction to the video: on 4.42 I say “there is a natural inductance” but of course I mean “”there is a natural capacitance” (!). Logical in the explanations.

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