The Diamond SD-330 is a versatile mobile antenna designed for easy installation on cars using a magnetic mount like the Watson W-300S triple magnetic mount. Standing approximately 1.7m in height, this base-loaded electronically tuned antenna features a flexible whip mounted on a spring coil. It comes with a detachable DC cable that is 22ft long, including a short detachable length at the car end with a remote up/down press button unit and a cigar plug. The antenna draws a current of only 100 mA, making it efficient and practical for mobile use.

Tuning the Diamond SD-330 antenna is a straightforward process. By pressing the up or down button and listening for signal strength to peak, users can quickly achieve close to minimum VSWR. Fine adjustments can be made using the radio's VSWR meter. The antenna's large diameter base coil allows tuning to any frequency within the 3.5 - 30MHz range. With a power handling capacity of 200 Watts SSB, a PL-259 base connector, and a remote up/down controller, the Diamond SD-330 offers comprehensive features for optimal performance in mobile communication setups.

The Diamond SD-330 antenna is a reliable choice for mobile communication enthusiasts. Its wide frequency range, efficient tuning process, and practical design features such as the detachable DC cable and remote controller make it a versatile and user-friendly option for enhancing communication capabilities while moving.