EFHW-7510-1K-ICAS

Description

EFHW-7510-1K-ICAS™ Multi-Band End Fed Half Wave Antenna 

“This is the first EFHW antenna we introduced back in 2015, and we are proud to celebrate its 10th anniversary. Over the years, we’ve made subtle enhancements to ensure top performance: the transformer has been refined, and the antenna wire has been upgraded to durable 16-gauge XLPE stealth wire. In 2016, this antenna was reviewed by ARRL QST Magazine, and you can read the detailed review here.”

EFHW-7510-1KW-ICAS Multi-Band End Fed Half-Wave Antenna with pole/tower installation hardware

The EFHW-7510-1KW-ICAS is a premium End-Fed Half-Wave (EFHW) antenna designed for seamless multi-band operation across the 75/40/30/20/17/15/12/10m bands. Unlike many end-fed antennas on the market, this model requires no antenna tuner, thanks to its resonance on 80m (3.5 MHz) and its harmonics (2nd, 3rd, 4th, etc.).

Features and Advantages

• No Tuner Required: Fully resonant across multiple bands.
• High-Efficiency Transformer:
  • Designed with two FT-240 (2.4-inch dia.) stacked cores for minimal insertion loss.
  • Transformation ratio of ~56:1 (~2800:50 Ohms).
  • Optimized for 3.5–30 MHz with an unmatched average loss of less than 0.6 dB—a benchmark in the market for RF transformers.
  • Worldwide leader in high-ratio, wide-bandwidth transformer design by E73M.
• Flexible Installations:
  • Can be deployed in configurations such as horizontal, vertical, inverted V, or inverted L.
• Stealth Design:
  • Constructed with durable, black #16 AWG XLPE wire for a low-visibility, weather-resistant installation.
  • Equipped with stainless steel hardware for longevity.

Technical Specifications

• Frequency Range: 3.5–30 MHz.
• Resonant Bands: 75/40/30/20/17/15/12/10m.
• Power Handling:
  • 1 kW I.C.A.S. for voice modes.
  • 250W for digital modes such as FT8.
• Wire Length: ~130 feet.
• Connector: Silver/Teflon SO-239.
• Transformer: MEF-330-1KW-ICAS, optimized for 3–30 MHz.
• Pole /Tower hardware: U-bolts with V-blocks  for a diameter up to 2 inches (51mm)

Grounding Recommendations

• Grounding the coaxial cable at the home’s entry point is highly recommended to protect equipment from electrostatic buildup and prevent electrostatic discharge (ESD).
• If the transformer box is mounted high above the ground, grounding at the box is unnecessary—ground the coaxial cable instead.
• Note: Grounding does not affect antenna tuning.

SWR Performance

• Typical SWR readings are better than 2:1 when mounted 25–30 feet above ground and fed with 50 feet of RG8X coaxial cable.

Perfect for Emergency and Professional Use

This antenna is ideal for ALE HF-Link, NVIS, MARS, ARES, EMCOMM, and similar applications. It’s suitable for both temporary and permanent installations, ensuring reliable communication in critical scenarios.