Micro Coaxial Cable-Micro Coaxial Cable factory-(FRS)-FRS
For ham radio operators and amateur communicators, the coaxial cable is far more than a “connecting wire”—it is the lifeline of signal integrity. A poorly chosen or installed coaxial cable can lead to significant signal loss, interference, or even damage to transmitters. To maximize communication range and clarity, understanding the key characteristics of coaxial cables and matching them to your specific needs is critical.
Not all coaxial cables are equal. When selecting one for ham radio use, focus on these non-negotiable metrics:
Ham radio systems (transmitters, receivers, antennas) are standardized to 50 ohms of impedance. Using a cable with a different impedance (e.g., 75 ohms, common in TV cables) creates a “mismatch” at connection points. This mismatch reflects signals back to the transmitter, causing power loss and potential overheating of components. Always verify the cable’s impedance rating—look for labels like “RG-58/U 50Ω” or “LMR-400 50Ω.”
Attenuation measures how much signal strength is lost as it travels through the cable, typically expressed in decibels per 100 feet (dB/100ft) at a specific frequency (e.g., 144 MHz for VHF, 430 MHz for UHF). For example:
Amateur radio signals are vulnerable to interference from household electronics (microwaves, Wi-Fi routers) and external RF noise. A cable’s shielding blocks this interference and prevents the cable itself from radiating signals (which wastes power). Look for:
VSWR quantifies signal mismatch between the cable and connected devices (ideal VSWR = 1:1). A cable with poor construction (e.g., uneven dielectric material) can increase VSWR even if impedance is 50 ohms. Choose cables from reputable manufacturers to ensure consistent VSWR performance.
Your use case determines the best cable type. Here’s how to match cables to common amateur communication setups:
| Use Case | Recommended Cable | Reasoning |
| Handheld radio (HT) to small magnetic antenna | RG-58/U or RG-174 | Thin, flexible, and lightweight—easy to carry for portable operations. Attenuation is low enough for 10–30ft runs. |
| Base station (10–50W) to rooftop antenna (50–100ft) | RG-213/U | Balances low attenuation (~2 dB/100ft at 144 MHz) and durability. Handles mid-range power without overheating. |
| High-power base station (100W+) or long runs (150ft+) | LMR-400 or RG-8X | Ultra-low attenuation and high power tolerance (up to 1.5kW at 144 MHz). Resistant to weathering for outdoor use. |
| Mobile radio (car/truck) to trunk-mount antenna | RG-59/U (dual-shielded) | Flexible enough to route through vehicle panels, with shielding to block noise from the car’s electrical system. |
Even the best cable will underperform with poor installation:
When reliability matters for your amateur communications, FRS brand coaxial cables deliver the performance you need. Designed specifically for ham radio operators, FRS cables meet strict 50-ohm impedance standards, feature dual-shielding (95% braid + aluminum foil) for maximum interference protection, and offer low attenuation across VHF/UHF bands. Whether you’re building a portable HT setup, a mid-power base station, or a long-range high-power system, FRS has a cable tailored to your use case—all manufactured in our ISO-certified factory for consistent quality. Keep your signals strong, clear, and reliable: Choose FRS coaxial cables for your next ham radio project.
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