Cable
LMR400 Times
End A
RP-SMA MALE
$1.00
End B
SO239 UHF Female
$3.00
LMR400 Times — RP-SMA MALE to SO239 UHF Female
Custom LMR400 Times cable assembly with RP-SMA MALE and SO239 UHF Female connectors. Every cable is hand-assembled, tested, and ships free.
| Length | Price | |
|---|---|---|
| 1 ft | $27.49 | |
| 6 ft | $37.49 | |
| 25 ft | $75.49 | |
| 50 ft | $125.49 | |
| 100 ft | $225.49 | |
| 250 ft | $525.49 | |
| 500 ft | $1,025.49 |
Specs Summary
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.
LMR400 Times 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 LMR400 Times coaxial cable used for?
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.
What is the signal loss of LMR400 Times?
At 1800 MHz, LMR400 Times 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.
