BA5IK 40m-10m End Fed Half Wave (EFHW)

Description

The BA5IK end fed half wave antenna is a versatile, multi-band solution for amateur radio operators looking to expand their communication capabilities without the need for extensive trimming or tuning. With its wide bandwidth and natural resonance, this antenna offers an easy-to-deploy option that covers the 40 meter, 20 meter, 15 meter, and 10 meter bands.

Key Benefits:

• Wide Bandwidth: The BA5IK antenna boasts a significantly wider working bandwidth compared to other types of antennas. This allows for more efficient use of the available frequency range.
• Natural Resonance: With a natural resonance point that is typically more than 1 meter above ground level, this antenna minimizes the need for adjustments and trimming during installation.
• Multiband Operation: The BA5IK antenna enables seamless operation on multiple bands, including 40-meter (half-wavelength), 20-meter (full wavelength), 15-meter (half-wavelength), and 10-meter (two wavelengths) bands.
• High Radiation Efficiency: Despite its natural resonant points, the BA5IK antenna maintains a high level of gain and radiation efficiency, ensuring optimal performance across all supported bands.

The BA5IK antenna employs a high-ratio conversion unun for matching purposes. While this approach may result in slightly higher heat loss due to the turns ratio and magnetic flux density, it offers a suitable solution for beginners and occasional operators.

Main Features:

• Four-Band Coverage: The antenna supports operation on four key amateur radio bands: 7MHz (40m), 14MHz (20m), 21MHz (15m), and 28MHz (10m).
• Low SWR: With a standing wave ratio (SWR) of less than 1.5 across the specified frequency range, this antenna ensures efficient power transfer to the connected transceiver.
• 100W Power Handling: Designed to withstand continuous operation at a peak envelope power (PEP) of up to 100W, making it suitable for both SSB and digital modes of communication.
• Low Unun Insertion Loss: The antenna’s unun insertion loss is approximately 1.5dB, maintaining high signal integrity throughout the transmission process.

The BA5IK antenna features a robust construction with a 2.5 square mm pure copper multi-strand line that is UV-resistant and suitable for long-term outdoor use. With an overall length of about 20 meters, this antenna offers flexibility in terms of installation orientation, allowing for horizontal, diagonal, or vertical configurations.

If you’re looking for an easy-to-deploy, versatile antenna solution for your amateur radio setup, the BA5IK end-fed half-wave antenna is a solid choice. Whether you’re a novice operator or an experienced ham, this antenna provides reliable performance across multiple bands without requiring extensive tuning or trimming.

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