Sirio SMA 108-550 MAG60 – VHF/UHF 1/4 Wave Mobile Antenna Adjustable 108-550 MHz

The Sirio SMA 108-550 MAG60 is a versatile and robust mobile antenna solution, ideal for users needing a specific frequency in the wide VHF/UHF band. Thanks to its cuttable stainless steel whip, it perfectly adapts to the needs of radio amateurs, aviation professionals, marine, or PMR services. Its included magnetic base allows for immediate implementation without drilling.

Highlights

• Wide tunable bandwidth: Covers an exceptional range from 108 to 550 MHz, allowing use on multiple services (Aviation, Marine, 2m/70cm Amateur Radio, PMR, TETRA).
• Sirio manufacturing quality: 17/7 PH stainless steel whip and chromed brass components for optimal resistance to corrosion and weather.
• Easy installation: Delivered complete with a powerful magnetic base (MAG 60), ideal for temporary use or on rental vehicles.
• High power handling: Supports up to 100 Watts, suitable for most mobile transceivers on the market.
• Usage flexibility: The provided cutting diagram allows the antenna to be precisely adjusted to the desired resonance frequency for an optimal SWR.

Technical Specifications

• Antenna type: 1/4 λ (Quarter wave)
• Radiation: Omnidirectional
• Polarization: Linear Vertical
• Frequency range: 108 ... 550 MHz (Tunable by cutting the whip)
• Compatible systems: 2m-HAM, 70cm-HAM, Airband (VHF Airband), Marine Band, AIS, ORBCOMM M2M, TETRA (350/380 MHz), CDMA-450, LTE-450, LoRa-433
• Gain: 0 dB ref. to λ/4 whip (2.15 dBi)
• Max Power: 100 Watts
• Impedance: 50 Ohms
• Bandwidth at 108 MHz: &gt, 5.2 MHz (for SWR ≤, 2)
• SWR at resonance frequency: &lt, 1.2
• Materials: 17/7 PH Stainless Steel, Nylon, Chromed Brass
• Maximum height: approximately 720 mm (at 108 MHz)
• Weight: approximately 350 g
• Mounting: MAG 60 magnetic base included
• Cable: 3 meters of RG58 coaxial
• Connector: UHF-Male (PL-259)

Compatibility

• Mobile transceivers: Compatible with all radios (Yaesu, Icom, Kenwood, Anytone, Motorola, CRT) having an SO-239 (UHF Female) output.
• Frequency bands:
  • Aviation (118-136 MHz)
  • Amateur Radio 2m (144-146 MHz)
  • Marine VHF (156-162 MHz)
  • Professional PMR / LMR (VHF and UHF)
  • TETRA and Telemetry (380-470 MHz)
  • Amateur Radio 70cm (430-440 MHz)

FAQ

Why choose the Sirio SMA 108-550 MAG60?

• Extreme versatility: A single antenna capable of covering any frequency between 108 and 550 MHz according to your needs.
• Complete ready-to-use kit: No need to buy a mount or cable separately, everything is included.
• Durability: Italian manufacturing by Sirio guarantees corrosion-resistant materials (Stainless steel and Brass).
• Performance: As a custom-cut 1/4 wave antenna, it often offers better efficiency than a generic untuned wideband antenna.
• Value for Money: An affordable professional solution to equip a vehicle quickly.