Cable
LMR400 Times
End A
RP-SMA FEMALE
End B
SO239 UHF Female
Specs Summary
100 ft LMR400 Times — RP-SMA FEMALE to SO239 UHF Female
LMR400 Times cable assembly, 100 feet, with RP-SMA FEMALE and SO239 UHF Female connectors. Hand-assembled, tested, and ships free within the US.
100 ft — RP-SMA FEMALE / SO239 UHF Female
$225.49
Free shipping • In stock
Other lengths:
Signal Loss — 100 ft
Approximate insertion loss for this 100 ft LMR400 Times assembly at common RF frequencies.
| Frequency | Loss / 100 ft | Loss — 100 ft |
|---|---|---|
| 100 MHz | 1.5 dB | 1.5 dB |
| 450 MHz | 3.3 dB | 3.3 dB |
| 900 MHz | 4.7 dB | 4.7 dB |
| 1.8 GHz | 6.8 dB | 6.8 dB |
| 2.4 GHz | 7.9 dB | 7.9 dB |
| 5.8 GHz | 13 dB | 13 dB |
About This Assembly
LMR400 Times Cable
LMR-400 is the industry-standard low-loss 50-ohm coaxial cable from Times Microwave with a 0.400" outer diameter, offering less than half the signal loss of RG-8 at 2.4 GHz. The go-to cable for base station feedlines, cellular repeater installations, antenna runs from 50 to 200 feet, and any fixed installation requiring reliable broadband performance.
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 cellular repeater installations, base station feedlines, and long outdoor antenna runs. 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.
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 100 ft?
Yes. This page is for the 100 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 100 ft cable?
At 1800 MHz, LMR400 Times loses approximately 6.8 dB per 100 ft. This 100 ft assembly will have roughly 6.8 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 RP-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.
