Why do radios get better reception when humans get closer to it?
Two possibilities:
1. If it is portable and not earthed, then proximity of the body adds capacitance to earth, giving the antenna something to work against. This would be noticeable on shortwave bands using the telescopic rod or a wire antenna,
2. Tuning pull effect, on many cheaper radios, the removal of the hand capacitance after tuning, can result in a slight tuning shift, making accurate tuning impossible.
1. If it is portable and not earthed, then proximity of the body adds capacitance to earth, giving the antenna something to work against. This would be noticeable on shortwave bands using the telescopic rod or a wire antenna,
2. Tuning pull effect, on many cheaper radios, the removal of the hand capacitance after tuning, can result in a slight tuning shift, making accurate tuning impossible.
Labels: Radio
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