Cable
RFC240 ULTRA FLEX
End A
RP-SMA MALE
$1.00
End B
SO239 UHF Female
$3.00
RFC240 ULTRA FLEX — RP-SMA MALE to SO239 UHF Female
Custom RFC240 ULTRA FLEX cable assembly with RP-SMA MALE and SO239 UHF Female connectors. Every cable is hand-assembled, tested, and ships free.
| Length | Price | |
|---|---|---|
| 1 ft | $20.98 | |
| 6 ft | $30.98 | |
| 25 ft | $68.98 | |
| 50 ft | $118.98 | |
| 100 ft | $218.98 | |
| 250 ft | $518.98 | |
| 500 ft | $1,018.98 |
Specs Summary
About This Assembly
RFC240 ULTRA FLEX Cable
RFC-240-UltraFlex is the flexible version of RFC-240, combining low-loss 0.240" performance with improved bendability for easier installation. Ideal for mobile radio setups, vehicle antenna mounts, and congested equipment areas where a rigid cable would be impractical.
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 mobile radio setups and flexible medium-length antenna connections. 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.
RFC240 ULTRA FLEX Signal Loss
Approximate attenuation at common RF frequencies.
| Frequency | Loss / 100 ft | Loss / ft |
|---|---|---|
| 100 MHz | 2.6 dB | 0.026 dB |
| 450 MHz | 5.6 dB | 0.056 dB |
| 900 MHz | 8.1 dB | 0.081 dB |
| 1.8 GHz | 11.7 dB | 0.117 dB |
| 2.4 GHz | 13.6 dB | 0.136 dB |
| 5.8 GHz | 22.5 dB | 0.225 dB |
Frequently Asked Questions
What is RFC240 ULTRA FLEX coaxial cable used for?
RFC-240-UltraFlex is the flexible version of RFC-240, combining low-loss 0.240" performance with improved bendability for easier installation. Ideal for mobile radio setups, vehicle antenna mounts, and congested equipment areas where a rigid cable would be impractical.
What is the signal loss of RFC240 ULTRA FLEX?
At 1800 MHz, RFC240 ULTRA FLEX has approximately 11.7 dB of loss per 100 ft (0.117 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.
