Sirio Antennas?

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iMONITOR

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MACOMB, MI.
I found some interesting antennas I'm considering for monitoring the aircraft bands, both commercial, and military. I'm curious if anyone is familiar with them, or is actually using them? They appear to be made well, and should stand up to Michigan's weather. I'd be interested in your opinions.

Thanks!

Sirio GP 430 LB/N 380 - 480 MHz UHF Ground Plane Antenna, 2.15 dBi-300 Watts

[SIZE=+0]Features:[/SIZE]

Base station antenna, Wide-band
Unity-gain, Omnidirectional
Protection from static discharges DC-Ground
Perfect protection against the worst weather conditions
Made of anodized aluminium alloy
Stainless steel hardware
Side mast mounting allowed by optional bracket FT-2 code 2510004.00 Electrical Data

Type: 1/4λ ground plane large band
Frequency range @ SWR ≤1.7: 380 - 480 MHz
Impedance: 50Ω
Radiation (H-plane): 360° omnidirectional
Radiation (E-plane): beamwidth @ -3 dB = 80°
Radiation angle: 0°
Polarization: linear vertical
Gain: 0 dBd - 2.15 dBi
Max. power (CW) @ 30°C: 300 Watts
Grounding protection: All metal parts are DC-grounded, the inner conductor shows a DC short - Connector:
GP 430 LB: N-female or UHF Mechanical Data

Materials: Anodized Aluminium, Stainless Steel, Nylon
Wind load / resistance: 18 N @ 150 Km/h / 180 Km/h
Wind surface: 0.02 m²
Height (approx.): 295 mm
Weight (approx.): 200 gr
Mounting mast: Ø 36-40 mm

Sirio GP 108-136 LB VHF Aircraft Band 108-136mhz Base Antenna (U Connector)

Features:

•Base station antenna, Wide-band
•Unity-gain, Omnidirectional
•Protection from static discharges DC-Ground
•Perfect protection against the worst weather conditions
•Made of anodized aluminium alloy
•Stainless steel hardware
•Side mast mounting allowed by optional bracket FT-2 code 2510004.00
Electrical Data


•Type: 1/4λ ground plane large band
•Frequency range: VHF AIR. band: Rx 108-136 MHz; Tx 118-136 at V.S.W.R. ≤ 2:1
•Impedance: 50Ω
•Radiation (H-plane): 360° omnidirectional
•Radiation (E-plane): beamwidth -3 dB = 78°
•Radiation angle: 0°
•Polarization: linear vertical
•Gain: 0 dBd - 2.15 dBi
•Max. Power (CW) 30°C: 1000 Watts
•Grounding protection: All metal parts are DC-grounded, the inner conductor shows a DC short
•Connector: UHF Connector
Mechanical Data


•Materials: Anodized Aluminium, Stainless Steel, Nylon
•Wind load / resistance: 43 U @ 150 Km/h / 160 Km/h
•Wind surface: 0.06 m²
•Height (approx.): GP 160 LB: 700 mm
•Weight (approx.): GP 160 LB: 950 gr
•Mounting mast: Ø 36-40 mm
 
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