Cable
LMR400 ULTRA FLEX Times
End A
RP-SMA MALE
End B
SMA MALE
Specs Summary
500 ft LMR400 ULTRA FLEX Times — RP-SMA MALE to SMA MALE
LMR400 ULTRA FLEX Times cable assembly, 500 feet, with RP-SMA MALE and SMA MALE connectors. Hand-assembled, tested, and ships free within the US.
500 ft — RP-SMA MALE / SMA MALE
$1,370.09
Free shipping • In stock
Other lengths:
Signal Loss — 500 ft
Approximate insertion loss for this 500 ft LMR400 ULTRA FLEX Times assembly at common RF frequencies.
| Frequency | Loss / 100 ft | Loss — 500 ft |
|---|---|---|
| 100 MHz | 1.6 dB | 8 dB |
| 450 MHz | 3.5 dB | 17.5 dB |
| 900 MHz | 5 dB | 25 dB |
| 1.8 GHz | 7.2 dB | 36 dB |
| 2.4 GHz | 8.4 dB | 42 dB |
| 5.8 GHz | 13.8 dB | 69 dB |
About This Assembly
LMR400 ULTRA FLEX Times Cable
LMR-400-UltraFlex delivers the same industry-leading low-loss performance as standard LMR-400 but with a stranded center conductor and more flexible jacket. Practical for mobile platforms, rooftop cellular installs, and dense equipment racks where stiff hardline cable would be difficult to route without damage.
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.
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.
Common Applications
This RP-SMA and SMA cable assembly is well suited for mobile radio installs, rooftop antenna runs, and rack-mounted equipment. The combination of reliable RP-SMA and 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 500 ft?
Yes. This page is for the 500 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 500 ft cable?
At 1800 MHz, LMR400 ULTRA FLEX Times loses approximately 7.2 dB per 100 ft. This 500 ft assembly will have roughly 36 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 – 6 GHz. The effective frequency limit is set by the lowest-rated component — either the cable or one of the connectors. Both RP-SMA MALE and 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.
