Best RG 400 Coax Cable for High Frequency RF, Long Runs and Low Loss
RG400 coax cables offer low loss and robust shielding for RF systems, making them ideal for ham radio, 4G/5G antennas, and measurement setups. This guide highlights five suitable options for American buyers, with clear guidance on who benefits most from each choice. It explains when to choose a double-shielded, high-temperature model, and which connectors or lengths suit your project. A quick summary table follows to compare key points at a glance.
| Product | ||
|---|---|---|
| Eightwood RG400 M17/128 20 ft | 20 ft | Long indoor/outdoor runs requiring strong shielding |
| MOOKEERF RG400 Coaxial Cable 10 ft | 10 ft | Low-loss short runs, compact installations |
| uxcell BNC Male to BNC Male RG400 2.74 m | ≈9 ft | RF or video signal testing with BNC gear |
| POBADY PL-259 to PL-259 3 ft RG400 | 3 ft | Walkie talkie, CB and SWR meter setups |
| Eightwood N Male to N Male RG400 1.6 ft | 1.6 ft | Higher frequency short jumpers for antennas |
Eightwood RG400 20-Foot Coax Cable With Double Shield
Product: Eightwood RG400 M17/128 RF Coaxial Cable, 20 feet. Material features include an inner silver-plated copper conductor, PTFE insulation, and a silver-plated copper double braid outer shield with a FEP jacket. Max operating frequency listed at 12,400 MHz. This model delivers strong shielding and high-temperature resistance, useful for long runs in demanding environments.
Best for: Hard-wired RF setups needing long, shielded runs, such as outdoor antenna feeds or equipment rooms. Better for: installations where signal integrity across 20 feet is crucial. Caution: thicker jackets can be less flexible in tight spaces.
Eightwood RG400 Coaxial Cable 40 Feet
Product: Eightwood RG400 RF Coax Cable M17/128 Double Shield Coaxial Cable, 40 feet. Features mirror those of the 20-foot variant with dual shielding, silver-plated copper conductors, and a PTFE insulator. The longer length supports extended runs with minimal loss when used with compatible equipment.
Best for: installations requiring extra reach without frequent connections. Choose this if you need longer cable sections in a single run. Limitation: longer cables may exhibit slightly higher total attenuation, depending on frequency and load.
MOOKEERF RG400 Coax Cable 10 Ft
Product: MOOKEERF RG400 Coaxial Cable, 10 ft. Notable for Low Loss due to a double-layer silver-plated copper braid and a silver-plated inner conductor. Key dimensions: inner conductor 19×0.203 mm; insulator PTFE 2.95 mm; outer conductor 3.95 mm; jacket 4.95 mm. The jacket uses FEP insulation for durability in varied environments.
Best for: compact RF installations or panel-mount antenna feeds where space is limited. Better for: environments that require minimal attenuation over a short run. Caution: verify connector compatibility for your gear to maximize performance.
uxcell BNC Male to BNC Male RG400 Cable
Product: uxcell BNC Male to BNC Male Coax Cable RG400, 50 Ohm. Features nickel-plated connector bodies and gold-plated contacts to support RF and video signal transfers. This cable is suitable for test benches and lab experiments with BNC equipment because of reliable connectors and mid-range length.
Best for: quick RF signal tests or video setups with BNC hardware. Better for: temporary or bench use where quick connect/disconnect is desired. Limitation: ensure the RG400 impedance and connector type match your equipment to avoid impedance mismatches.
POBADY UHF PL-259 to PL-259 RG400, 3 Feet
Product: POBADY UHF Male PL-259 to Male PL-259 Low Loss Coax Cable RG400, 3FT/1M. Impedance: 50 Ohm. Designed for walkie talkies, CB radios, SWR meters, antenna analyzers, and amateur radio equipment. The connector design emphasizes compatibility with common UHF devices.
Best for: short jumpers in mobile or field setups where UHF PL-259 connectors are standard. Better for: quick on-site swaps and portable rigs. Limitation: shorter length may require additional extensions for some installations.
Eightwood N Male to N Male RG400 Short Jumper
Product: Eightwood N Male to N Male Jumper RG400, 1.6 feet. This short, sturdy jumper uses N-type connectors and 50 Ohm impedance, suitable for short-distance RF links, antenna connections, and high-frequency routing. It features double shielding and a heavy stranded inner conductor for reliability.
Best for: tight installations where a robust N-to-N connection is needed. Better for: routing from a router or small antenna to a nearby radio. Caution: ensure N connectors are compatible with your equipment to avoid misfits or poor connection.
Buying Guide: RG400 Coax Cable Essentials
- Impedance and frequency: RG400 is typically 50 Ohms, suitable for high-frequency RF applications up to around 12 GHz. Confirm your system’s impedance before purchasing.
- Shielding vs. flexibility: Double-braided shields improve shielding effectiveness, especially in interference-heavy environments. However, longer, thicker cables can be stiffer; balance shielding needs with installation flexibility.
- Conductor and jacket materials: Silver-plated copper conductors and PTFE insulators minimize attenuation. FEP jackets offer durability and temperature resilience, useful for indoors and outdoors.
- Connectors: Matching connectors (BNC, PL-259, N-type) to your gear is essential. Stainless/Gold plating reduces corrosion and improves contact reliability in the field.
- Length considerations: Longer cables add attenuation. If possible, plan layouts to minimize unnecessary length while preserving signal integrity.
- Environment and temperature: Some RG400 cables are rated for high-temperature exposure. Use in environments with elevated temperatures or near equipment that heats up during operation.
FAQ
- What is RG400 coax used for?
– It is a low-loss RF coax suitable for high-frequency signals, antennas, and measurement equipment, with double shielding to reduce interference. - What does 50 Ohm impedance mean?
– It matches most RF transmission lines and antennas to minimize reflections and maximize power transfer. - Do I need double shielding?
– Double shielding is advantageous in noisy environments or long runs where external interference could affect signal quality. - Which connector should I choose?
– Pick connectors that match your devices (BNC, PL-259, or N-type). Consistent impedance across connections is important. - How long should my RG400 cable be?
– Use the shortest length that meets your installation needs to minimize signal attenuation. - Can RG400 be used outdoors?
– Yes, several variants use durable jackets (FEP) and shielding suitable for outdoor use, but ensure weather rating and protection for exposed runs.