Description
Product Overview
The Tram Tunable VHF Antenna is engineered for versatile VHF communication across a 144 MHz to 174 MHz spectrum. Featuring a 5/8‑wave design, it delivers 3dBd of gain, enhancing signal strength and transmission clarity. Constructed from solid brass for the NMO mount and a zinc die‑cast housing, the antenna is fully shielded and weather‑resistant, ensuring long‑term reliability in outdoor environments. The kit includes a 17‑ft RG‑58A/U low‑loss coaxial cable with a PL‑259 male connector and a stainless steel L‑bracket finished in black for trunk groove or side mounting.
Usage
Designed for emergency responders, amateur radio operators, and commercial fleets, this antenna excels in mobile and fixed installations where clear VHF communication is critical. Whether mounted on a vehicle trunk, side panel, or a stationary pole, the robust construction withstands rain, dust, and temperature extremes. The tunable frequency range allows users to optimize performance for specific channels and regional requirements, making it suitable for public safety, event coordination, and hobbyist activities.

Why Choose Us
Tram combines precision engineering with premium materials to deliver an antenna that maintains performance over years of use. The brass NMO mount provides a secure, corrosion‑resistant connection, while the zinc die‑cast housing protects internal components from environmental stress. Our comprehensive mounting kit and high‑quality coaxial cable reduce installation time and signal loss, ensuring you get the most out of every transmission.
Key Features
- Adjustable 144‑174 MHz frequency range for optimal channel tuning
- 3dBd gain with 5/8‑wave design improves signal strength and clarity
- Solid brass NMO mount and zinc die‑cast housing for durability and weather resistance
- Includes 17‑ft low‑loss RG‑58A/U coaxial cable with PL‑259 connector
- Stainless steel L‑bracket with black finish for versatile trunk or side mounting
FAQ
What is the tuning process for this antenna?
Connect the antenna to a VHF transceiver, adjust the built‑in tuner while monitoring signal strength, and lock the position once the desired frequency within the 144‑174 MHz range is achieved.
Can this antenna be used on a motorcycle?
Yes, the compact design and sturdy L‑bracket allow secure mounting on motorcycle trunks or side panels, provided the surface can accommodate the bracket.
Is the coaxial cable suitable for long runs?
The 17‑ft RG‑58A/U low‑loss cable is ideal for typical vehicle installations. For longer runs, consider using a higher‑grade low‑loss cable to maintain signal integrity.
How does the weatherproofing protect the antenna?
The zinc die‑cast housing is sealed against moisture and dust, and the brass mount resists corrosion, ensuring reliable performance in rain, snow, and high humidity.
What warranty does Tram provide?
Tram offers a one‑year limited warranty covering manufacturing defects in materials and workmanship for the antenna and mounting components.






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