Cable
LMR400 Times
End A
BNC MALE
End B
RP-SMA MALE
Specs Summary
250 ft LMR400 Times — BNC MALE to RP-SMA MALE
LMR400 Times cable assembly, 250 feet, with BNC MALE and RP-SMA MALE connectors. Hand-assembled, tested, and ships free within the US.
250 ft — BNC MALE / RP-SMA MALE
$524.49
Free shipping • In stock
Other lengths:
Signal Loss — 250 ft
Approximate insertion loss for this 250 ft LMR400 Times assembly at common RF frequencies.
| Frequency | Loss / 100 ft | Loss — 250 ft |
|---|---|---|
| 100 MHz | 1.5 dB | 3.75 dB |
| 450 MHz | 3.3 dB | 8.25 dB |
| 900 MHz | 4.7 dB | 11.75 dB |
| 1.8 GHz | 6.8 dB | 17 dB |
| 2.4 GHz | 7.9 dB | 19.75 dB |
| 5.8 GHz | 13 dB | 32.5 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.
BNC Connector
BNC (Bayonet Neill–Concelman) is a quick-connect RF connector featuring a bayonet locking mechanism for fast mating and unmating, rated from DC to 4 GHz. Its ease of use makes it standard in test and measurement equipment, video distribution, two-way radio accessories, and laboratory bench setups where cables are frequently connected and disconnected.
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 BNC and RP-SMA cable assembly is well suited for cellular repeater installations, base station feedlines, and long outdoor antenna runs. The combination of reliable BNC and RP-SMA 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 250 ft?
Yes. This page is for the 250 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 250 ft cable?
At 1800 MHz, LMR400 Times loses approximately 6.8 dB per 100 ft. This 250 ft assembly will have roughly 17 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 – 4 GHz. The effective frequency limit is set by the lowest-rated component — either the cable or one of the connectors. Both BNC MALE and RP-SMA MALE 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.
