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Light Bulb Antenna Basics (2018)
- mikewarot 6y agoTungsten lamp filaments are double coiled wire. According to wikipedia, there are 22 inches of wire in a typical 60 watt bulb. This decorative bulb, because it is cold, has a low resistance, likely only a few ohms, but the effective length is likely to be quite substantial, perhaps 40 feet or more. Thus, this lamp is effectively an inductively loaded whip. As long as you keep the power down, otherwise it'll become a resistive load Tungsten is paramagnetic, which I believe means it only weakly increases the inductance of a coil made from it.