Electronics & Computing

The Best RG-178-U Coaxial Cables

1 min read WeKompare Editorial Team Products verified: September 1, 2026 10 products compared

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RG-178-U coaxial cable is a specialized type designed for high-frequency applications, particularly where space is limited. Selecting the correct cable ensures optimal signal integrity, minimizes signal loss, and guarantees the reliability of your electronic systems. Understanding key specifications will help you make an informed decision for your project.

No. 1
JAMECO VALUEPRO RG174/U-100VP RG-174-U Coaxial Cable 26 AWG 100 Feet
JAMECO VALUEPRO RG174/U-100VP RG-174-U Coaxial Cable 26 AWG 100 Feet
  • The product type is RG-174-U Coaxial Cable 26 AWG 100 Feet
  • It is manufactured by Jameco Valuepro
  • It is manufactured in Taiwan
  • item package weight: 0.93 pounds
$30.12 Amazon Prime
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No. 2
Superbat RG174 Coax Coaxial Cable Black 50 Ohm Flexible Rg-174 Bare 15ft
Superbat RG174 Coax Coaxial Cable Black 50 Ohm Flexible Rg-174 Bare 15ft
  • Type: rg174 coaxial cable | Length: 17ft （518cm）
  • Impedance: 50 ohm | Max Frequency: 1000MHz
  • Material: Inner conductor: Bare Copper | Insulation: Solid PE | Outer conductor: Tinned Copper Bried | Jacket: PVC
  • Diameter(mm): Inner conductor: 7*0.17 | Insulation: 1.52 | Outer conductor: Nom.1.90 | Jacket: 2.79
  • We are a professional radio frequency coaxial cable company, the cables are of high quality, you can buy our products with great confidence.
$7.99
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No. 3
uxcell RG178 Coax Coaxial Cable Lead Low Loss Adapter Cord 5M Long
uxcell RG178 Coax Coaxial Cable Lead Low Loss Adapter Cord 5M Long
  • Product Name : RG178 Coaxial Cable;External Material : Plastic, Alloy
  • Cable Length : 5M/ 16.4Ft;Cable Dia : 1.8mm/0.07"
  • Color : Gold Tone
  • Net Weight : 45g
  • Package Content : 1 xRG178 Coaxial Cable
$9.99
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No. 4
YOTENKO RG213 Coaxial Cable 50FT - CB Coax Cable PL259 to PL259 Low Loss
YOTENKO RG213 Coaxial Cable 50FT - CB Coax Cable PL259 to PL259 Low Loss
  • 【Type】- RG213 coaxial cable w/PL-259 connectors, Cable Length: 50-feet(15.3m), Impedance: 50-ohm, Protection: Heat-shrink tubing on both ends to keep out contaminants.
  • 【Ultra-Low Loss】- RG213/U cable has much lower loss than common thinner cables like RG58/RG8X. It only loses 4.42dB per 100 feet at 400MHz, with a VSWR of 1.25 or less, making it ideal for long-distance and high-power RF signal transmission or...
  • 【Outstanding Transmission Properties】-RG213 coax offers great transmission features, including a stable 50-ohm impedance and a low capacitance of 31.7 pf/ft, ensuring signal integrity and speed.
  • 【Durable Construction】-Built tough, RG213 PL259 cable has a 7-strand bare copper inner conductor, polyethylene insulation, a bare copper braid shield and a protective outer layer of PVC. The 96% coverage copper braid provides excellent EMI shielding...
  • 【Applications】- The rg-213/u direct burial cable's PVC jacket offers good resistance to UV rays and chemical corrosion, making it suitable for indoor and outdoor environments. Its lack of flexibility and heavier weight make it used for fixed and...
$59.99
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SaleNo. 5
RFaha 5pcs RF U.FL(IPEX/IPX) Mini PCI to SMA Female Pigtail Antenna Wi-Fi Coaxial RG-178 Low Loss Cable...
RFaha 5pcs RF U.FL(IPEX/IPX) Mini PCI to SMA Female Pigtail Antenna Wi-Fi Coaxial RG-178 Low Loss Cable...
  • Connector Material: Pure Copper with Great connectivity(Not Alloy)
  • Connectors: SMA Female to U.FL(IPEX/IPX) Mini PCI
  • Cable type: Flexiable Coaxial Quality Low Loss RG-178
  • Impedance: 50 ohm
  • Cable length: 20in / 20cm, Quantity: 5pcs
−11% $7.99
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No. 6
18' RG-58A/U Coaxial Cable With Pl-259 Connectors
18' RG-58A/U Coaxial Cable With Pl-259 Connectors
  • TRUCKSPEC 18' Antenna Coax Cable with PL-259 Connectors.
  • Perfect for CB, Amateur and Two-Way Radio Applications.
  • High Quality RG-58A/U Coax With Molded PLK-259 Connectors Installed.
$13.49 Amazon Prime
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No. 7
Superbat RG 316 Cable Low Loss RF Coaxial Coax Cable for DIY 20 Feet
Superbat RG 316 Cable Low Loss RF Coaxial Coax Cable for DIY 20 Feet
  • Type: RF Coax RG316 Cable | Length: 20 feet
  • Material: Inner conductor: silver plated copper clad steel | Insulation: PTFE | Outer conductor( shielding) :silver plated copper braid | Jacket: FEP
  • Thin rg316 coaxial cable : Diameter(mm): Inner conductor:7*0.175 | Insulation: 1.52 | Outer conductor( shielding): 1.95 | Jacket: 2.50
  • Impedance: 50 ohm | Max Frequency: 3000MHz |Operating Temperature Rating(℃): -55～+200
  • We are a professional radio frequency coaxial cable company, the cables are of high quality, you can buy our products with great confidence.
$14.40
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No. 8
uxcell RG8/U Coax Cable with Pl-259 Male Connectors for CB/Ham Radio 23m/75ft
uxcell RG8/U Coax Cable with Pl-259 Male Connectors for CB/Ham Radio 23m/75ft
  • 75.5 ft RG8/U Antenna Coax Cable With Pl-259 Male Connectors.
  • Perfect for CB, Amateur and Two-Way Radio Applications.
  • RG8/U Coax With PL-259 Connectors Installed.
  • Stranded center conductor for flexibility and the cable is made of pure copper with good quality.
  • RG-8X coax is a step up from standard RG-58 coaxial and is recommended for high-powered applications or users who simply want the best coax possible
$38.29
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No. 9
uxcell RG8/U Coax Cable with Pl-259 Male Connectors for CB/Ham Radio 30.5m/100ft
uxcell RG8/U Coax Cable with Pl-259 Male Connectors for CB/Ham Radio 30.5m/100ft
  • 100 ft RG8/U Antenna Coax Cable With Pl-259 Male Connectors.
  • Perfect for CB, Amateur and Two-Way Radio Applications.
  • RG8/U Coax With PL-259 Connectors Installed.
  • Stranded center conductor for flexibility and the cable is made of copper with good quality.
  • RG-8X coax is a step up from standard RG-58 coaxial and is recommended for high-powered applications or users who simply want the best coax possible
$62.69
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No. 10
Tan QY BNC RG-59/U Cable 15Ft - BNC Male to Male Extension Connector Adapter Professional RG-59/U Grade...
Tan QY BNC RG-59/U Cable 15Ft - BNC Male to Male Extension Connector Adapter Professional RG-59/U Grade...
  • RG-59/U is a specific type of coaxial cable, often used for low-power video and signal connections. The cable has a characteristic impedance of 75 ohms, and a capacitance of around 20pF/ft (60pF/m). The 75 ohm impedance matches a dipole antenna in free...
  • True 75-ohm (rgb-59/U) Coax for accurate video and signal transfer
  • Oxygen-free copper (OFC) conductor for enhanced signal clarity
  • RG-59/U is a specific type of coaxial cable, often used for low-power video and signal connections. The cable has a characteristic impedance of 75 ohms, and a capacitance of around 20pF/ft (60pF/m). The 75 ohm impedance matches a dipole antenna in free...
  • Low profile metallic connectors ensure a secure connection and increase durability; Heavy shielding protects the transmission data against electromagnetic interference (EMI) and radio frequency interference (RFI)
$10.99
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Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API

How to Choose the Best RG-178-U Coaxial Cables

Length and Shielding

Cable length will affect signal attenuation, so select a length that is sufficient for your needs without being excessively long, as longer cables introduce more signal loss. Shielding effectiveness is another critical factor. A well-constructed braid shield minimizes electromagnetic interference (EMI) and radio frequency interference (RFI), ensuring a cleaner signal. For applications where EMI/RFI is a significant concern, look for cables with high shield coverage (e.g., 95% or higher).

Frequently Asked Questions

What is the primary advantage of RG-178-U cable?
The primary advantages of RG-178-U cable are its small diameter, high-temperature tolerance, and suitability for high-frequency applications. These characteristics make it ideal for use in confined spaces and demanding environments.
What is the typical impedance of RG-178-U coaxial cable?
RG-178-U coaxial cable is standardized to have an impedance of 50 ohms. This impedance is critical for matching with other RF components to ensure efficient power transfer and minimize signal reflections.
What types of connectors are commonly used with RG-178-U cable?
The most common connectors used with RG-178-U cable are SMA connectors. These are designed for high-frequency performance and provide a secure connection suitable for many RF applications.
How does cable length affect signal quality?
Longer cable lengths generally lead to increased signal loss (attenuation). It's important to choose a cable length that is just long enough for your application to minimize this signal degradation.
Is RG-178-U suitable for outdoor use?
The suitability for outdoor use depends on the outer jacket material. Cables with UV-resistant and weather-resistant jackets can be used outdoors, but it's essential to check the manufacturer's specifications.
What is the significance of the dielectric material in RG-178-U?
The dielectric material, typically PTFE (Teflon), is significant because it allows the cable to operate at high frequencies with low signal loss. It also provides excellent thermal stability and chemical resistance.