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WiNRADiO AX
(Mounted using the optional WR-AC-RMB-114 base.)
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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
G303/G313 range 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.
WR-BT-650
Power Injector (Bias "T") and power supply not included. Both are
required for antenna operation with any unit other than the G33EM. |
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Optional accessories
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The WR-AC-RMB-114 heavy duty rail-mount antenna base
has a single swiveling mount. It accepts any standard antenna with
a 1" diameter standard #14 thread (such as the AX-81S antenna) and
can be mounted on a railing of 7/8 to 1" diameter. Material is
stainless steel 316 grade.
Special Order Item $39.95 |
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The WR-AC-DMB-114 heavy duty deck-mount antenna base
has two swiveling mounts for complete adjustability. It accepts any
standard antenna with a 1" diameter standard #14 thread (such as the
AX-81S antenna). Material is stainless steel 316 grade.
Special Order Item $39.95 |
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The
WR-CMC-30 Common-Mode Choke eliminates common-mode noise
from the antenna feedline, resulting in a considerable increase of
the received signal quality. Common-mode noise is generated by
computers and other electric or electronic appliances, and can be a
problem especially in the lower portions of HF spectrum.
The Common-Mode Choke can be also very useful to provide an
alternative earthing point if the AX-81S antenna itself cannot be
grounded due to its location, or its ground connection is
inadequate.
Special Order Item $49.95 |
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The
WR-BT-650 Power Injector (Bias "T") provides a means of
injecting DC power in a coaxial cable, to power the antenna from a
remotely located power supply. It features a flat frequency response
and low insertion loss.
Special Order Item $99.95
Note that the Power Injector is not required if the AX-81S
antenna is used with the WiNRADiO
G33EM
receiver which already provides suitable power for the antenna at
the receiver's antenna input. For other applications, we recommend
using WiNRADiO
SF-41 range of low-noise power supplies.
Special Order Item $19.95 |
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Technical Specifications
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Type |
Active HF antenna monopole |
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Frequency range |
2 - 30 MHz @ 3 dB
(excellent performance from 300 kHz to 50 MHz) |
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Output IP2 |
+60 dBm |
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Output IP3 |
+30 dBm |
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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. |
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Supply current |
40 mA @ 12 V |
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Impedance |
50 ohm |
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Connector |
BNC (concealed in body) |
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Operating temperature |
-20� to 80�C |
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Active element length |
1160 mm (3.8 ft) |
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Active element diameter |
3 mm (0.118 in) |
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Body length |
190 mm (7.45 in) |
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Body diameter |
38 mm (1.45 in) |
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Mounting |
1" diameter standard #14 thread |
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Overall length |
1350 mm (4.43 ft) |
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Weight |
550 g (1.21 lb) |
Specifications are subject to change without notice due to continuous
product development and improvement. |
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