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cuhu... wrote:
Just what do they mean by Active? (hey,I am dumb) Does it mean it is Active because they use a battery and the battery "Activates" it? cuhulin ----------------------- And active antenna is an antenna with a built in amplifier, or "active" component. For example the AmRad active antenna uses a special FET (Field Effect Transistor) and is "as effective" as a ~100' long wire. For low frequencies, like a 60KHz signal, even a 100' antenna is short. The AmRad, DA100-E, "North County" and even the "Tiny Tenna" all use transistors to convert a small 36" or so, wire into a usefull antenna. The Tiny Tenna is the simplest, but even it will do a decent job far from any MW (AM 540~1600KHz). Loops can be passive or have amplifiers, and those with amplifiers are termed active. For RF reception from 500KHz through ~30MHz I prefer the common ~100' wire antenna. For MW DX work a loop is hard to beat. For LF work, 500KHz and lower, an active antenna is the only practical way to go. Terry |
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