CB Antenna Kit for No-Ground-Plane RV Installations with a Concealed-Connection Side Mount and 17-Foot Coax

This CB antenna kit equips an RV, motorhome or trailer for CB communication when a substantial metal chassis ground is unavailable. Firestik's no-ground-plane system is designed for installation on fiberglass, wood and other non-metal surfaces, pairing the antenna with a side mount and matched 17-foot NGP coax cable.

The teardrop side mount keeps mounting hardware and coax connections inside the vehicle wall for a tidy exterior. A screw-adjustable antenna tip makes tuning straightforward. Choose a 3-foot or 4-foot antenna in black or white to suit your installation and available clearance.

Features

• No-ground-plane design suits installations without a substantial metallic chassis.
• Side mount hides hardware and coax connections inside the vehicle wall.
• Tunable antenna tip adjusts by turning a screw.
• Matched 17-foot NGP coax cable is included.
• Mount includes mounting hardware, a rubber gasket, metal reinforcement plate, nylon insulator and ground terminal lug.
• Both antenna lengths have a 100-watt rating.

Specifications

• Product type: No-ground-plane CB antenna kit
• Models: LG3-M2 and LG4-M2
• Antenna lengths: 3 feet or 4 feet
• Antenna colors: Black or white
• Antenna power rating: 100 watts for either length
• Included components: One selected 3-foot or 4-foot NGP antenna; M-2 side mount; 17-foot NGP coax cable; wire microphone hanger
• Mount shell: Black plastic with a textured finish
• Mounting surface area: Approximately 3.125 × 1.675 inches (79 × 43 mm)
• Upper mounting hole diameter: 13/32 inch (10 mm)
• Lower mounting hole diameter: 13/64 inch (5 mm)
• Mounting hole spacing: 1.5 inches (38 mm) center to center
• Outward protrusion: Approximately 1.88 inches (48 mm)
• Maximum mounting surface thickness: 0.28 inch (7 mm)
• Installation requirements: Two drilled holes and interior access to secure bolts and connect the coax
• Radio compatibility: Virtually all CB radios
• NGP cable compatibility: Included NGP cable attaches directly only to Firestik NGP antennas
• Cable length restriction: Do not shorten the tuned NGP cable; shortening causes non-repairable damage
• Cable extension: Standard RG-58 A/U cable may be added between the radio and NGP cable; lengths in multiples of nine feet are preferred
• Approximate comparison range: 3-foot antenna: 2–3 miles; 4-foot antenna: 3–5 miles. Actual range depends on installation and environmental conditions
• Warranty: Five years for the antenna; one year for the mount and coax

Frequently Asked Questions

Is this CB antenna kit suitable for an RV with a fiberglass body?

Yes. This no-ground-plane CB antenna kit is designed for fiberglass, wood and other non-metal mounting surfaces where a substantial metallic chassis ground is unavailable. The mounting surface must be no thicker than 0.28 inch, and you need access behind it.

Should I choose the 3-foot or 4-foot antenna?

Choose the 4-foot antenna if your installation has enough clearance; choose the 3-foot antenna when height is more restricted. Approximate comparison ranges are 2–3 miles for the 3-foot version and 3–5 miles for the 4-foot version, with actual results depending on installation and surroundings.

Does the side mount require drilling?

Yes. The M-2 side mount requires two holes, spaced 1.5 inches center to center. You also need interior access to fasten the mounting bolts and connect the coax cable.

Can I shorten the included coax cable?

No. The included 17-foot NGP coax is part of a tuned circuit and cannot be shortened without non-repairable damage. If additional reach is needed, standard RG-58 A/U cable can be added between the radio and NGP cable, preferably in multiples of nine feet.

How do I tune the antenna?

Adjust the kit's tunable antenna tip by turning the screw at the top of the antenna. Follow the NGP installation instructions when setting up the system and adjusting SWR.