RFC400 ULTRA FLEX — PL259 UHF Male to RP-SMA FEMALE
Custom low loss RFC400 ULTRA FLEX RF coaxial cable assembly with PL259 UHF Male and RP-SMA FEMALE connectors.
Cable
RFC400 ULTRA FLEX
End A
PL259 UHF Male
End B
RP-SMA FEMALE
Specs Summary
Made in USA
Assembled and tested in-house
Free Shipping
Fast, reliable delivery
Tested & Verified
Every cable tested before shipping
Easy Returns
30-day hassle-free returns
Need help choosing a cable?
Our RF experts are here to help you get the right fit.
Call an RF expert
1-661-200-0771
Email us
sales@wifiexpert.us
Need a custom cable?
Build your exact cable in seconds using our Cable Builder.
About This Assembly
Specs Summary
RFC400 ULTRA FLEX Cable
RFC-400-UltraFlex combines the low-loss performance of 0.400" coax with the flexibility needed for complex routing, offering an economical option for installations that benefit from increased bendability. Suitable for rooftop antenna runs, equipment room patch cables, and mobile installs where budget and flexibility are both priorities.
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.
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.
Common Applications
This RP-SMA and UHF cable assembly is well suited for flexible outdoor antenna runs and budget-conscious mobile installations. 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 ULTRA FLEX Signal Loss
Approximate attenuation at common RF frequencies.
| Frequency | Loss / 100 ft | Loss / ft |
|---|---|---|
| 100 MHz | 1.6 dB | 0.016 dB |
| 450 MHz | 3.5 dB | 0.035 dB |
| 900 MHz | 5 dB | 0.05 dB |
| 1.8 GHz | 7.2 dB | 0.072 dB |
| 2.4 GHz | 8.4 dB | 0.084 dB |
| 5.8 GHz | 13.8 dB | 0.138 dB |
Frequently Asked Questions
What is RFC400 ULTRA FLEX coaxial cable used for?
RFC-400-UltraFlex combines the low-loss performance of 0.400" coax with the flexibility needed for complex routing, offering an economical option for installations that benefit from increased bendability. Suitable for rooftop antenna runs, equipment room patch cables, and mobile installs where budget and flexibility are both priorities.
What is the signal loss of RFC400 ULTRA FLEX?
At 1800 MHz, RFC400 ULTRA FLEX has approximately 7.2 dB of loss per 100 ft (0.072 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 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.
