WiNRADiO AX-81S Active HF Antenna
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WiNRADiO Communications

WiNRADiO AX-81S Active HF Antenna

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£184.75
(£153.96 exc. VAT)
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Product code: WR-AX-81S
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Item CostFinance OptionDepositMonthly PaymentsTotal Cost
£184.75
12 Months 14.9% APR
£18.48
£15.92
£209.53
£184.75
18 Months 14.9% APR
£18.48
£10.61
£209.53
£184.75
24 Months 14.9% APR
£18.48
£7.96
£209.53
£184.75
36 Months 14.9% APR
£18.48
£5.31
£209.53
£184.75
48 Months 14.9% APR
£18.48
£3.98
£209.53
£184.75
12 Months 19.5% APR
£18.48
£16.56
£217.18
£184.75
18 Months 19.5% APR
£18.48
£11.04
£217.18
£184.75
24 Months 19.5% APR
£18.48
£8.28
£217.18
£184.75
36 Months 19.5% APR
£18.48
£5.52
£217.18
£184.75
48 Months 19.5% APR
£18.48
£4.14
£217.18

The AX-81S antenna is a compact active HF antenna, ruggedized to suit harsh outdoor environments, and particularly suitable for marine environments. While it has been designed primarily as a marine antenna, it can be useful anywhere where good HF performance and reliability are required, and where space is at premium. The antenna is receive-only, and is suitable for professional as well as consumer applications.The antenna covers the frequency range of 2 to 30 MHz, or 300 kHz to 50 MHz with somewhat reduced (but still excellent) performance.While designed to be entirely general-purpose, the AX-81S antenna is especially suitable for the WiNRADiO G33EM marine receivers and G3 series of HF receivers.The principal elements of the antenna are constructed of a low-carbon austenitic stainless steel that contains molybdenum. Austenitic (chromium and nickel content) stainless steels have high ductility (i.e. ability of a metal to plastically deform without breaking or fracturing), low yield stress and high ultimate tensile strength, when compared to a typical carbon steel. The 316L grade as used for the AX-81S antenna also offers an especially high degree of resistance to corrosion. The choice of materials and the durable construction of the AX-81S antenna will ensure trouble-free operation for many years.The antenna was designed for rapid installation, with an easy-to-follow installation procedure supplied with the antenna.

Technical Specifications

Type Active HF antenna monopole

Frequency range 2 - 30 MHz @ 3 dB

(excellent performance from 300 kHz to 50 MHz)

Output IP2 +60 dBm

Output IP3 +30 dBm

Supply voltage 12 V DC (min 10 V, max 14 V),

supplied via the coaxial cable

Note: The WiNRADiO G33EM receiver supplies power for the AX-81S antenna at its antenna input, and no external power supply is needed. For any other applications we recommend using a WiNRADiO SF-41 Low-noise Linear Power Supply together with the WiNRADiO WR-BT-650 Power Injector.

Supply current 40 mA @ 12 V

Impedance 50 ohm

Connector BNC (concealed in body)

Operating temperature -20º to 80ºC

Active element length 1160 mm (3.8 ft)

Active element diameter 3 mm (0.118 in)

Body length 190 mm (7.45 in)

Body diameter 38 mm (1.45 in)

Mounting 1" diameter standard #14 thread

Overall length 1350 mm (4.43 ft)

Weight 550 g (1.21 lb)