You’ll get a compact 2m/70cm vehicle antenna that covers 136–174 MHz and 400–470 MHz with 2.5 dBi (VHF) and 4 dBi (UHF) gain, VSWR <1.5, 50 Ω and 50 W max—so it’s optimized for mobile crossband use rather than long-range high-gain performance. The 73 cm fiberglass whip, spring base and waterproof mount suit roof or trunk installs; a 5 m RG58 lead with PL259 is included. Keep it high, bonded, and you’ll avoid common-mode issues; more specifics follow.
Some Key Takeaways
- Covers 2m (136–174 MHz) and 70cm (400–470 MHz) bands with single compact dual-band antenna for vehicle use.
- Provides usable gain (2.5 dBi VHF, 4 dBi UHF) and omnidirectional 360° azimuth radiation pattern.
- Robust fiberglass whip, spring base, and waterproof mount suit mobile and small-base station environments.
- Includes 5 m RG58 with PL259 (plus PL259-to-BNC adapter) but expect higher loss on long runs.
- Easy install with L-bracket and U-bolts; bond mount to chassis and test bracket locations to minimize VSWR.
What This 2m/70cm Car Radio Antenna Actually Does and Who It’s For
Because it covers both 2 meters (VHF 136–174 MHz) and 70 centimeters (UHF 400–470 MHz), this antenna gives you a single, compact solution for vehicle and small-base station communications across GMRS, ham, and many mobile radio bands. You’ll use it for mobile crossband operations, vehicle-to-vehicle, and short-range base tasks where space and simplicity matter. Compared to separate VHF/UHF antennas, it reduces mounts and feedlines while matching 50 ohm systems. You’ll appreciate antenna aesthetics—fiberglass radome and slim profile—if curb appeal matters. It’s aimed at hobbyists, mobile operators, and minimalist station builders seeking durable, multi-band convenience.
Performance Breakdown: Range, Gain, VSWR, and Power Limits
While not a high-gain mast, this 2m/70cm antenna gives you practical performance for mobile and short-base use: specified gain is 2.5 dBi on VHF and 4 dBi on UHF, VSWR stays under 1.5 across the 136–174 MHz and 400–470 MHz bands, and the 50 Ω impedance matches common transceivers to minimize feeder loss. You’ll see omnidirectional coverage with 360º azimuth and ~30º elevation, so signal propagation favors horizontal movement and local repeaters. With a 50 W power limit you avoid thermal limits in typical mobile use; compare to higher-power base rigs, this is conservative but reliable. This makes it a good choice for outdoor enthusiasts who need durable gear for coastal and beach activities with waterproof flashlights.
Build and Mounting: Materials, Spring Base, Cable, and Connector Details
When you mount this 73 cm fiberglass radome, you’ll notice the spring base provides both shock absorption and obstacle protection, letting the antenna flex on impact rather than transfer force to the mount or feedline. You’ll handle a ∅20.5 mm fiberglass whip rated for UV resistance, light yet rigid compared with metal alternatives. The spring and L-bracket use stainless steel fasteners for corrosion resistance and waterproofing at the base. A 5 m RG58 feed delivers 50 ohm continuity to a PL259 connector; a PL259-to-BNC adapter is included. The assembly minimizes mechanical stress and simplifies non-drill mounting with two U-bolts. This product is ideal for active outdoor settings like the beach where users often bring compact fitness gear and accessories beach-ready dumbbells.
Real-World Installation Tips and Common Troubleshooting Steps
If you want reliable performance, start by mounting the antenna as high and as clear of obstructions as practical—roof or trunk-edge mounts typically outperform lower, tucked locations because they preserve the antenna’s 360° horizontal pattern and reduce multipath nulls. Use the included L-bracket or spring base; compare bracket locations for lowest VSWR. Grounding techniques matter: bond mount to vehicle chassis with short, thick braid to minimize common-mode currents and improve lightning protection. Route RG58 away from engine noise, secure with clamps for minimal microphonics. For weak signals check connectors, continuity, and signal shielding; replace damaged PL259s or cables promptly. For outdoor and coastal use consider rugged, corrosion-resistant antennas and accessories to stay connected near the beach and outdoor spaces.
Should You Buy It? Compatibility, Pros/Cons, and Final Recommendation
Because it balances usable gain, broad VHF/UHF coverage, and a rugged mount, this 2m/70cm antenna suits most mobile GMRS/ham car installs where you need a straightforward, weatherproof solution; you’ll get 2.5 dBi (VHF) and 4 dBi (UHF), VSWR under 1.5, and a spring base plus L-bracket for flexible mounting without drilling. You should buy it if you need an affordable, durable dual-band antenna compatible with common rigs (AT-5555N, AT-588UV, MRF45D) and simple vehicle installs. Pros: solid ENV specs, waterproof, included cable/adapter. Cons: RG58 loss at long runs, basic gain. Check price comparison and user reviews before deciding.
Some Questions Answered
Is the Antenna Compatible With Marine VHF DSC Systems?
Yes — you can use it, but with caveats. You’ll get basic marine compatibility for VHF channels within 136–174 MHz since its vhf tuning covers that band. Performance isn’t optimized for DSC or long-range marine service compared with dedicated marine antennas: gain (2.5 dBi), VSWR <1.5 and waterproof radome are adequate, but installation, grounding and antenna height limit reliability. For critical DSC safety use, choose a certified marine VHF antenna.
Can the Antenna Be Used for APRS Packet Transmission?
Yes — you can use it for APRS packet transmission on 2m. You’ll get moderate APRS range thanks to 2.5 dBi VHF gain and 360º horizontal coverage; performance’s comparable to other mobile fiberglass antennas. The kit lacks a native TNC connector on the coax (PL259 provided), so you’ll need a PL259-to-TNC adapter or different cable to interface with your TNC/AX.25 setup for reliable packet TNC coupling and grounding.
Does the Kit Include Mounting Instructions or Diagrams?
Yes — the kit includes a basic L-bracket, U-bolts, screws and a spring mount but it doesn’t include detailed installation diagrams; you’ll get basic assembly guidance only. You’ll need to compare mounting options and may follow generic RG58 PL259 installation diagrams online for exact routing. Check Warranty details with the vendor before installation, since improper mounting or drilling can affect warranty coverage and outdoor-use claims.
Is the Coax Shield Grounded Inside the Vehicle During Installation?
Yes — you should ground the coax shield to the vehicle chassis during installation. Good grounding practices guarantee shield continuity from antenna mount through the RG58 braid to chassis ground, reducing RF noise and lightning risk. Compared to leaving it isolated, a bonded shield yields lower VSWR and better receiver performance. Use the provided L‑bracket or spring base and a secure clamp to maintain continuous electrical contact and direct ground.
Are Replacement Springs or Radomes Available From the Manufacturer?
Yes — you can request replacement radomes and spring spares from the manufacturer. You’ll find Lotuskyeserra offers spare parts on request; availability may vary by region and warranty status. Technically, the fiberglass radome and steel spring are replaceable, improving longevity versus integrated designs. Expect to compare lead times, cost, and fit (∅20.5 mm radome, max spring ∅45.2 mm) before ordering to make certain compatibility.
