The Diamond HF15CL is a premium, high-performance single-band mobile antenna designed specifically for dedicated HF operations on the popular 15-meter amateur radio band (21 MHz). Manufactured by Diamond Antenna to meet the rigorous demands of mobile enthusiasts, this center-loaded whip antenna delivers exceptional efficiency and signal propagation. It serves as the ultimate mobile solution for hams looking to establish reliable, long-distance DX contacts from their vehicles without the performance compromises of multi-band compromise antennas.
Engineered for premium mechanical and electrical durability, the HF15CL is constructed using high-quality stainless steel elements that withstand high-speed highway wind resistance and harsh weather elements. Its 1/4 wave, center-loaded design places the inductive loading coil higher up the antenna structure. This design significantly increases radiation efficiency compared to bottom-loaded whips, allowing your RF power to project efficiently into the ionosphere. With a substantial length of 2.20 meters and weighing 550 grams, it balances robust construction with an aerodynamic footprint.
The Diamond HF15CL covers a continuous frequency range from 21.0 to 21.45 MHz, and offers an easy-to-tune whip element to achieve a low SWR of less than 1.5 across your preferred section of the band. Built to manage high-power transceivers, it boasts a maximum power rating of 200 Watts SSB (PEP) and 70 Watts on FM, making it fully compatible with standard 100W HF mobile transceivers with comfortable thermal safety margins. The base of the antenna is terminated with a heavy-duty UHF male connector (M-P / PL-259), making it universally compatible with heavy-duty mobile trunk mounts, gutter mounts, or bumper mounts.
Key Features
- Dedicated 15m Band Performance: Optimized specifically for maximum efficiency on the 21 MHz amateur radio band.
- Center-Loaded 1/4 Wave Design: Higher coil placement maximizes radiation efficiency and boosts DX performance over standard bottom-loaded whips.
- 200W High Power Rating: Easily handles up to 200 Watts SSB (PEP) or 70 Watts FM, perfect for standard 100W mobile rigs.
- Premium Stainless Steel Build: Constructed with high-grade, resilient materials for long-term survival in demanding mobile conditions.
- Low SWR Performance: Easily tuned to achieve an SWR of less than 1.5 at your targeted frequency.
- Standard M-P (PL-259) Connector: Heavy-duty base interfaces natively with standard SO-239 mobile mounts.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Diamond Antenna |
| Model Designation | HF15CL |
| Product Type | Single-Band HF Mobile Whip Antenna |
| Target Band | 15-Meter Band (21 MHz) |
| Frequency Range | 21.0 – 21.45 MHz |
| Antenna Type | 1/4 Wave, Center-Loaded |
| Maximum Power Rating | 200W SSB (PEP) / 70W FM |
| Nominal Impedance | 50 Ohms |
| SWR (Standing Wave Ratio) | Less than 1.5 |
| Connector Base | M-P (PL-259 / UHF Male) |
| Maximum Length | 2.20 m |
| Net Weight | 550 g |
Package Content
- 1x Diamond HF15CL Center-Loaded Base Section
- 1x Adjustable Stainless Steel Whip Rod
