Comet RS‑840 Heavy‑Duty Antenna Base Lip Mount for Large HF/VHF/UHF Antennas Adjustable Trunk/Hatchback Support with Rubber Paint Protection and Secure Clamp

The Comet RS‑840 Heavy‑Duty Antenna Base Lip Mount is a rugged and dependable vehicle antenna mount designed for amateur radio operators, mobile communicators, and field technicians who require a secure base for large HF, VHF, and UHF antennas. This robust mount clamps onto the edge of trunks, hatchbacks, or rear doors without drilling, providing a strong and adjustable platform for antennas that can reach up to approximately 80 inches in length. A unique support lip crosses over the mounting gap, distributing mechanical load and preventing unwanted rotation or lateral movement, which is especially beneficial when using heavier antennas or traveling at speed. Built with longevity in mind, the RS‑840 incorporates a heavy‑duty metal frame with adjustable planes that let you fine‑tune the antenna angle for vertical operation. Once positioned, a through‑bolt clamp tightens securely to the lip, and multiple set screws ensure firm contact even on slightly irregular surfaces. The addition of a soft rubber gasket protects your vehicle’s paint from scratches and abrasion, making this mount ideal for leased vehicles or those with sensitive finishes. This mount is compatible with PL‑259 antennas and works seamlessly with many Comet and third‑party antennas, making it versatile across HF, VHF, and UHF bands. Its mechanical strength and thoughtful design offer a reliable solution for base‑mobile installations, emergency communications vehicles, or hobbyist rigs that see frequent setup and teardown. Whether you are mounting long HF aerials for DX operation or robust VHF/UHF whips for repeater work, the Comet RS‑840 delivers consistent performance and peace of mind on the road.

• Heavy‑duty antenna lip mount engineered for secure mounting of large HF, VHF, and UHF antennas on vehicle trunks, hatches, and doors; designed with a robust support tab that spans across gaps for maximum rigidity when used with long or heavy antennas
• The RS‑840 bracket features precision‑engineered adjustable planes and a through‑bolt clamp mechanism that locks the antenna position to prevent slippage or movement during transport or high‑speed travel on highways
• Soft rubber padding protects vehicle paint and finish throughout the installation while the mount body itself resists bending and abrasion, ensuring long‑lasting durability even with repeated antenna swaps or repositioning
• Compatible with a wide range of PL‑259 terminated antennas—including quad‑band Comet antennas like the HMC‑6S, UHV‑4, UHV‑6, and popular aftermarket HF mobile whips—this mount simplifies installation and enhances mechanical stability
• Ideal for amateur radio, public safety, CB, and mobile communications setups, the RS‑840 is a top‑tier choice for operators who mount antennas up to 80 in (about 2 m) in length, providing dependable performance under varied driving conditions
• Heavy‑duty adjustable lip mount with lateral support tab for enhanced rigid mounting
• Through‑bolt clamp system prevents movement or slippage under load
• Soft rubber gasket protects vehicle paint and finish
• Compatible with long antennas up to ~80 in (2 m) and PL‑259 terminated rigs
• Ideal for mobile amateur, CB, VHF/UHF and HF antenna installations