The Diamond HF40CL is a premium, high-performance single-band mobile antenna engineered specifically for dedicated HF operations on the popular 40-meter amateur radio band (7 MHz). Designed with Diamond Antenna’s legendary mechanical precision and outstanding electrical efficiency, this center-loaded 1/4 wave whip is the ultimate choice for ham radio operators seeking reliable local and long-distance (DX) contacts while on the road. Its robust construction ensures minimal losses, allowing you to maximize the performance of your mobile transceiver setup.
Standing at a total physical length of 2.20 meters, the HF40CL utilizes a high-efficiency center loading coil layout that physically shortens the radiator’s profile without sacrificing radiation performance. The antenna is designed to handle a maximum power capacity of up to 200 Watts SSB, making it perfectly compatible with standard 100W mobile transceivers running SSB voice, digital modes, or CW. The bottom base section terminates in a heavy-duty, standard PL male (PL-259 / UHF male) connector, ensuring a secure and stable thread-on connection to heavy-duty vehicle mounts, magnetic bases, or trunk lip brackets capable of supporting a mast of this size.
Constructed with a highly flexible, premium-grade stainless steel whip element, the HF40CL is built to absorb physical impacts from low-hanging branches, highway vibrations, and extreme wind resistance. Its 50 Ohm nominal impedance ensures excellent matching to your radio equipment, keeping SWR levels to a minimum across your active frequency segment. For absolute convenience, the antenna’s design allows for precise fine-tuning of the SWR by adjusting the telescopic top whip element to match your preferred operating portion of the 40m band.
Key Features
- Dedicated single-band mobile antenna optimized for the 7 MHz (40-meter) amateur radio band.
- Center-loaded 1/4 wave whip architecture designed to deliver exceptional radiation efficiency.
- Supports up to 200 Watts SSB maximum power, matching standard mobile HF transceivers.
- Heavy-duty PL male (PL-259) connector base for ultra-reliable mechanical and RF connection.
- Constructed from premium stainless steel to withstand wind resistance and physical impacts.
- Adjustable top whip element allows for easy, precise SWR tuning on your target frequency.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Diamond Antenna |
| Model Designation | HF40CL |
| Antenna Type | Center-Loaded 1/4 Wave HF Mobile Antenna |
| Frequency Band | 7 MHz (40-Meter Amateur Band) |
| Maximum Power Rating | 200 Watts SSB (Single Sideband) |
| Nominal Impedance | 50 Ohms |
| Base Connector | PL Male (PL-259 / UHF Male) |
| Whip Material | High-Flex Stainless Steel |
| Total Length | 2.20 m (approx. 86.6 inches) |
Package Content
- 1x Diamond HF40CL 7 MHz Mobile Antenna Mast with Center Coil
- 1x Adjustable Top Stainless Steel Tuning Whip Element
- 1x SWR Adjustment Hex Key & Set Screws
