Sirio SA-270MN Dual Band VHF/UHF Base Antenna 2m/70cm 200W (N Female)

Sirio SA 270 MN Dual Band Base Antenna 2m/70cm 200W (N Female)

The Sirio SA 270MN is a high-gain dual band base station antenna covering the 2m and 70cm amateur bands with no tuning required. Built from aluminium, fibreglass, and stainless steel, it's engineered for permanent mast-mounted installations where durability and performance matter. With 200W power handling and compatibility across HAM, TETRA, ORBCOMM M2M, and LoRa/SIGFOX/ISM 433MHz systems, it's a versatile workhorse for any shack or repeater site.

Electrical Specifications

• Frequency Range: 142–148 MHz (VHF) & 427–442 MHz (UHF) — no tuning required
• Type: VHF: ⁶⁄₈λ / UHF: 3 × ⅝λ collinear
• Compatible Systems: 2m HAM, 70cm HAM, ORBCOMM M2M, TETRA, CDMA-450, ISM/SIGFOX/LoRa 433MHz
• Gain: VHF: 2 dBd (4.15 dBi) / UHF: 4.2 dBd (6.35 dBi)
• Max Power: 200W
• Radiation: Omnidirectional
• Polarisation: Linear Vertical
• Grounding: All metal parts DC-grounded; inner conductor capacitively coupled
• Connector: N Female

Mechanical Specifications

• Materials: Aluminium, Chromed Brass, Stainless Steel, Fibreglass
• Height: 1720mm (approx. 5.64 ft)
• Weight: 1030g (approx. 2.27 lb)
• Mounting: On-Mast

Why Choose the Sirio SA-270MN?

• No tuning required — ready to install straight out of the box
• High 6.35 dBi UHF gain for strong 70cm base station performance
• 200W rated — suitable for high-power transceivers and repeater use
• Full DC grounding on all metal parts for lightning and static protection
• Multi-system compatibility: HAM, TETRA, LoRa, SIGFOX, ORBCOMM M2M
• Premium fibreglass and stainless steel build for long-term outdoor durability