Cable
RFC400
End A
RP-SMA FEMALE
$1.00
End B
SO239 UHF Female
$3.00
RFC400 — RP-SMA FEMALE to SO239 UHF Female
Custom RFC400 cable assembly with RP-SMA FEMALE and SO239 UHF Female connectors. Every cable is hand-assembled, tested, and ships free.
| Length | Price | |
|---|---|---|
| 1 ft | $21.98 | |
| 6 ft | $29.48 | |
| 25 ft | $57.98 | |
| 50 ft | $95.48 | |
| 100 ft | $170.48 | |
| 250 ft | $395.48 | |
| 500 ft | $770.48 |
Specs Summary
About This Assembly
RFC400 Cable
RFC-400 is a cost-effective 0.400" 50-ohm low-loss coaxial cable serving as a value-oriented alternative to LMR-400. It delivers strong performance on runs from 50 to 200 feet and is popular for cellular repeater trunk cables, outdoor antenna feedlines, and budget-conscious infrastructure deployments.
RP-SMA Connector
RP-SMA (Reverse Polarity SMA) uses the SMA threaded coupling mechanism but with the male/female pin convention reversed — the jack has a pin and the plug has a socket. Originally standardized to prevent connection of uncertified antennas to consumer WiFi equipment, RP-SMA is now the dominant connector on commercial WiFi routers, access points, and 2.4/5 GHz antennas.
UHF Connector
The UHF connector (also known as PL-259 male / SO-239 female) is a large, low-cost RF connector designed in the 1930s for HF and VHF frequencies. Despite its name, its practical usable range is below 300 MHz due to its non-constant impedance design. It remains extremely popular in amateur radio (HF through VHF), CB radio, and marine radio applications.
Common Applications
This RP-SMA and UHF cable assembly is well suited for cost-effective long antenna runs, cellular repeater trunk cables, and outdoor feedlines. The combination of reliable RP-SMA and UHF 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.
RFC400 Signal Loss
Approximate attenuation at common RF frequencies.
| Frequency | Loss / 100 ft | Loss / ft |
|---|---|---|
| 100 MHz | 1.5 dB | 0.015 dB |
| 450 MHz | 3.3 dB | 0.033 dB |
| 900 MHz | 4.7 dB | 0.047 dB |
| 1.8 GHz | 6.8 dB | 0.068 dB |
| 2.4 GHz | 7.9 dB | 0.079 dB |
| 5.8 GHz | 13 dB | 0.13 dB |
Frequently Asked Questions
What is RFC400 coaxial cable used for?
RFC-400 is a cost-effective 0.400" 50-ohm low-loss coaxial cable serving as a value-oriented alternative to LMR-400. It delivers strong performance on runs from 50 to 200 feet and is popular for cellular repeater trunk cables, outdoor antenna feedlines, and budget-conscious infrastructure deployments.
What is the signal loss of RFC400?
At 1800 MHz, RFC400 has approximately 6.8 dB of loss per 100 ft (0.068 dB/ft).
What frequency range does this assembly support?
This assembly is rated DC – 300 MHz, limited by the lowest-rated component across the cable and connectors.
What is a RP-SMA connector?
RP-SMA (Reverse Polarity SMA) uses the SMA threaded coupling mechanism but with the male/female pin convention reversed — the jack has a pin and the plug has a socket. Originally standardized to prevent connection of uncertified antennas to consumer WiFi equipment, RP-SMA is now the dominant connector on commercial WiFi routers, access points, and 2.4/5 GHz antennas.
