Often referred to as Long Wire Balun, this device is used to match the impedance of a long wire HF antenna to a 50 ohm input impedance of a receiver. Such impedance matching usually results in a significant signal strength increase (up to 17dB in some cases, and approximately 5dB on average), compared to the long wire antenna connected directly to the antenna input of the receiver.
For AM broadcast band (540-1700 kHz) portables, nothing peps up a portable’s reception like an external loop antenna. Place the AN200, a low cost, 9” diameter, tunable loop alongside any radio with a built-in ferrite loop antenna and tune it for dramatically magnified reception. For direct connection to a radio’s external antenna jack, a 3” shielded lead with a stereo phone plug on one end and tinned wires on the other is provided.
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