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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.
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The WiNRADiO WR-LWA-0130 Long Wire Antenna Adapter is designed to work on medium and short wave bands, covering a frequency range from 0.1 to 30 MHz.
It is especially suitable for use with WiNRADiO shortwave receivers, such as the WR-G31DDC receiver.
Unlike most conventional antenna adapters, the WiNRADiO WR-LWA-0130 Long Wire Antenna Adapter
employs a dual broadband transformer technique which offers an improved performance over single-transformer devices.
Installation
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The adapter is connected to the receiver via a BNC connector and a suitable low-loss coaxial cable.
For outdoor installation we recommend the use of Coax Seal applied over the BNC connector, for additional weather-proof protection.
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Strip the end of the antenna lead-in wire and tighten it under the winged nut. Connect the Long Wire Adapter
to the receiver using a coaxial cable with a BNC connector.
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Technical Specifications
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Type
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Dual-transformer passive impedance adapter
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Frequency range
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100 kHz to 30 MHz
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Impedance ratio
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1:9
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Connectors
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BNC (receiver side)
M4 screw with winged nut (antenna side)
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Enclosure
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Diecast aluminium
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Size
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60 x 35 x 30 mm (2.3 x 1.4 x 1.2 in)
(excluding connectors)
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Weight
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105 grams (3.8 oz)
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Specifications are subject to change without notice due to continuous product development and improvement.
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Frequency coverage 0.1 to 30 MHz