Cable
RFC400 ULTRA FLEX
End A
SMA FEMALE
End B
SO239 UHF Female
Specs Summary
50 ft RFC400 ULTRA FLEX — SMA FEMALE to SO239 UHF Female
RFC400 ULTRA FLEX cable assembly, 50 feet, with SMA FEMALE and SO239 UHF Female connectors. Hand-assembled, tested, and ships free within the US.
50 ft — SMA FEMALE / SO239 UHF Female
$118.59
Free shipping • In stock
Other lengths:
Signal Loss — 50 ft
Approximate insertion loss for this 50 ft RFC400 ULTRA FLEX assembly at common RF frequencies.
| Frequency | Loss / 100 ft | Loss — 50 ft |
|---|---|---|
| 100 MHz | 1.6 dB | 0.8 dB |
| 450 MHz | 3.5 dB | 1.75 dB |
| 900 MHz | 5 dB | 2.5 dB |
| 1.8 GHz | 7.2 dB | 3.6 dB |
| 2.4 GHz | 8.4 dB | 4.2 dB |
| 5.8 GHz | 13.8 dB | 6.9 dB |
About This Assembly
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.
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.
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 SMA and UHF cable assembly is well suited for flexible outdoor antenna runs and budget-conscious mobile installations. The combination of reliable 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.
Frequently Asked Questions
Is this cable hand-assembled in the USA?
Yes. Every CoaxRF cable assembly is hand-terminated and continuity tested at our US facility before shipping. We do not drop-ship pre-made cables from overseas — each cable is built to order.
Can I order a different length than 50 ft?
Yes. This page is for the 50 ft assembly. Use the length buttons above to select a different standard length, or use the Cable Builder for any custom length.
How much signal loss will I see with this 50 ft cable?
At 1800 MHz, RFC400 ULTRA FLEX loses approximately 7.2 dB per 100 ft. This 50 ft assembly will have roughly 3.6 dB of insertion loss at that frequency. See the signal loss table for all frequency points.
What is the maximum frequency for this assembly?
This assembly is rated DC – 300 MHz. The effective frequency limit is set by the lowest-rated component — either the cable or one of the connectors. Both SMA FEMALE and SO239 UHF Female connectors must be within spec at your target frequency.
What is your return policy?
We accept returns within 30 days of delivery. Custom-length cables are accepted as long as they are in original condition. Contact us and we will provide a prepaid return label at no charge.
