Sirio Signal Keeper is a base station omnidirectional "CB antenna".
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Sirio Antennas

Sirio Signal Keeper is a base station omnidirectional "CB antenna".

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£49.96
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Product code: 11-628
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Item CostFinance OptionDepositMonthly PaymentsTotal Cost
£49.96
12 Months 14.9% APR
£5.00
£4.30
£56.66
£49.96
18 Months 14.9% APR
£5.00
£2.87
£56.66
£49.96
24 Months 14.9% APR
£5.00
£2.15
£56.66
£49.96
36 Months 14.9% APR
£5.00
£1.43
£56.66
£49.96
48 Months 14.9% APR
£5.00
£1.08
£56.66
£49.96
12 Months 19.5% APR
£5.00
£4.48
£58.72
£49.96
18 Months 19.5% APR
£5.00
£2.98
£58.72
£49.96
24 Months 19.5% APR
£5.00
£2.24
£58.72
£49.96
36 Months 19.5% APR
£5.00
£1.49
£58.72
£49.96
48 Months 19.5% APR
£5.00
£1.12
£58.72

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Sirio Signal Keeper is a base station omnidirectional "CB antenna".

Sirio Signal Keeper is a base station omnidirectional "CB antenna".


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The SIGNAL KEEPER base station antenna is an omnidirectional antenna made of aluminium alloy 6063 T832. It is factory-tuned at mid-band and allows for side mast mounting with the optional bracket FT-2 code 2510004.00.

Electrically, the antenna is a 1/4 λ base-loaded ground plane type operating within a frequency range of 26-28 MHz. It has an impedance of 50Ω, a 360° omnidirectional radiation pattern in the H-plane, linear vertical polarization, and a gain of 0 dBd and 2.15 dBi. The antenna provides a bandwidth of at least 850 KHz at SWR ≤ 2, with SWR ≤ 1.2 at the resonant frequency. It can handle a maximum power of 100 Watts (CW) continuous and 300 Watts (CW) short time, with a direct/centre feed system/position and UHF-female connector.

Mechanically, the antenna is constructed with aluminium, steel, and nylon materials. It can withstand a wind load/resistance of 36 N at 150 Km/h / 130 Km/h, has a wind surface area of 0.03 m², a height of 2370 mm, weight of 640 gr, and radial length of 640 mm. Designed for mounting on a mast with a diameter of Ø 35-40 mm, the SIGNAL KEEPER antenna is a durable and efficient choice for base station applications.

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