SE HF-360 End Fed Vertical HF Antenna 80m-6m, 400W PEP, 5.5m Fibreglass, No Counterpoise, SO-239

The Sigma Euro-Comm SE HF-360 is a premium 5.5-metre end-fed fibreglass vertical antenna covering 80 metres through 6 metres (3.5–52 MHz TX / 1.8–55 MHz RX) — the fibreglass big brother to the SE HF X-80, sharing the same proven end-fed, no-counterpoise design but built from three fibreglass poles and a stainless steel tapered whip for a more robust, permanent installation. Like the X-80, it requires no counterpoise or radials and feeds directly via 50-ohm coax through the SO-239 socket at the base. A built-in 6:1 UNUN transformer in an IP65 weatherproof enclosure reduces the feed point impedance for efficient tuning via an external ATU or the automatic ATU in most modern HF transceivers. Notably, the HF-360 also covers 60m — a band not covered by the X-80. DC grounded design allows optional earthing to reduce static noise without affecting tuning. Rated at 400W PEP for amateur SSB/CW use. All fixings and a full installation guide are included. Compatible with the Sigma Plus Upgrade Kit (sold separately) for enhanced 40m & 80m performance.

Note: Power rating is for intermittent amateur use (SSB/CW). For AM or constant carrier data modes, a higher-rated BALUN is required. Recommended coax: RG-213 or Mini-8.

Band Performance (SWR with ATU)

• 80m — 1:3.1 (manual ATU required)
• 60m — 1:1
• 40m — 1:1
• 30m — 1:1
• 20m — 1:1
• 17m — 1:1 (manual ATU recommended)
• 15m — 1:1
• 12m — 1:1 (manual ATU recommended)
• 10m — 1:1
• 6m — 1:1 (manual ATU recommended)

Key Features

• End-fed vertical — no counterpoise or radials required
• Covers 80m–6m including 60m (3.5–52 MHz TX / 1.8–55 MHz RX)
• 400W PEP power handling (SSB/CW)
• Built-in 6:1 UNUN transformer in IP65 weatherproof enclosure
• 3-section fibreglass construction + stainless steel tapered whip
• SO-239 (UHF-Female) connector
• 50-ohm impedance — direct coax feed
• DC grounded — optional earthing for static noise reduction
• Pole-mountable at ground level or elevated
• All fixings & installation guide included
• Compatible with the Sigma Plus Upgrade Kit (sold separately)
  

Technical Specifications

• Type: End-fed fibreglass vertical
• TX frequency: 3.5–52 MHz (80m–6m incl. 60m)
• RX frequency: 1.8–55 MHz
• Power: 400W PEP (SSB/CW)
• Impedance: 50 ohms
• Connector: SO-239 (UHF-Female)
• Transformer: 6:1 UNUN (IP65 enclosure)
• Construction: 3 x fibreglass poles + stainless steel tapered whip
• Length: 5.5m (18 feet)