Sigma Euro-Comm SE HF X-80 End Fed Vertical HF Antenna 80m-6m, 400W PEP, 6m Telescopic, No Counterpoise, SO-239

The Sigma Euro-Comm SE HF X-80 is a 6-metre telescopic end-fed aluminium vertical antenna covering 80 metres through 6 metres (3.5–52 MHz TX / 1.8–55 MHz RX) — one of the most practical and versatile HF base antennas available for amateur radio operators with limited space. Unlike traditional HF verticals, the X-80 requires no counterpoise or radials and can be fed directly with 50-ohm coax via the SO-239 socket at the base, making installation straightforward. A built-in 6:1 UNUN transformer in an IP65 weatherproof enclosure at the base reduces the feed point impedance to a level that allows easy tuning via an external ATU or the automatic ATU built into most modern HF transceivers. The antenna can be pole-mounted at ground level or elevated to suit your installation. DC grounded design allows optional earthing to reduce local static noise without affecting tuning. Rated at 400W PEP for amateur use (SSB/CW). All fixings, fixtures, and a full installation guide are included.

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)
• 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 (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
• 6-metre telescopic aluminium element
• 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, fixtures & installation guide included
• Compatible with the Sigma Plus Upgrade Kit (sold separately) for enhanced 40m & 80m performance
  

Technical Specifications

• Type: End-fed telescopic vertical
• TX frequency: 3.5–52 MHz (80m–6m)
• 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)
• Length: 6m (20 feet)