Cable
RG400
End A
F MALE
$2.00
End B
SMA MALE
$1.00
RG400 — F MALE to SMA MALE
Custom RG400 cable assembly with F MALE and SMA MALE connectors. Every cable is hand-assembled, tested, and ships free.
| Length | Price | |
|---|---|---|
| 1 ft | $17.98 | |
| 6 ft | $32.98 | |
| 25 ft | $89.98 | |
| 50 ft | $164.98 | |
| 100 ft | $314.98 | |
| 250 ft | $764.98 |
Specs Summary
About This Assembly
RG400 Cable
RG-400 is a double-shielded, silver-plated PTFE coaxial cable built to MIL-C-17 specifications with a 0.195" outer diameter. Its construction mirrors RG-142 but with two braid shields for even greater shielding effectiveness. The standard cable for military and avionics applications requiring certified materials and traceable performance.
F Connector
The F connector is a low-cost threaded coaxial connector used almost exclusively in cable TV, satellite, and over-the-air broadcast applications. It uses the center conductor of RG-6 or RG-59 cable as the pin, which simplifies termination and reduces cost. F connectors are found on cable modems, satellite receivers, TV tuners, and distribution amplifiers.
SMA Connector
SMA (SubMiniature version A) is the most widely used RF connector in the industry, offering a threaded interface that provides a secure, low-reflection connection from DC to 18 GHz. Its compact size, 50-ohm impedance, and broad frequency range make it the default choice for WiFi equipment, software-defined radios, cellular antennas, GPS receivers, and RF test instruments.
Common Applications
This F and SMA cable assembly is well suited for military-spec RF interconnects and avionics signal routing. The combination of reliable F and SMA connectors and custom-cut cable length makes it a practical choice for both field installations and bench setups. Every assembly is hand-terminated, continuity tested, and ships free within the USA.
RG400 Signal Loss
Approximate attenuation at common RF frequencies.
| Frequency | Loss / 100 ft | Loss / ft |
|---|---|---|
| 100 MHz | 3.5 dB | 0.035 dB |
| 450 MHz | 7.8 dB | 0.078 dB |
| 900 MHz | 11.5 dB | 0.115 dB |
| 1.8 GHz | 17 dB | 0.17 dB |
| 2.4 GHz | 20 dB | 0.2 dB |
| 5.8 GHz | 34 dB | 0.34 dB |
Frequently Asked Questions
What is RG400 coaxial cable used for?
RG-400 is a double-shielded, silver-plated PTFE coaxial cable built to MIL-C-17 specifications with a 0.195" outer diameter. Its construction mirrors RG-142 but with two braid shields for even greater shielding effectiveness. The standard cable for military and avionics applications requiring certified materials and traceable performance.
What is the signal loss of RG400?
At 1800 MHz, RG400 has approximately 17 dB of loss per 100 ft (0.17 dB/ft).
What frequency range does this assembly support?
This assembly is rated DC – 2 GHz, limited by the lowest-rated component across the cable and connectors.
What is a F connector?
The F connector is a low-cost threaded coaxial connector used almost exclusively in cable TV, satellite, and over-the-air broadcast applications. It uses the center conductor of RG-6 or RG-59 cable as the pin, which simplifies termination and reduces cost. F connectors are found on cable modems, satellite receivers, TV tuners, and distribution amplifiers.
