Cable
LMR400 ULTRA FLEX Times
End A
RP-SMA FEMALE
End B
RP-TNC MALE
Specs Summary
250 ft LMR400 ULTRA FLEX Times — RP-SMA FEMALE to RP-TNC MALE
LMR400 ULTRA FLEX Times cable assembly, 250 feet, with RP-SMA FEMALE and RP-TNC MALE connectors. Hand-assembled, tested, and ships free within the US.
250 ft — RP-SMA FEMALE / RP-TNC MALE
$697.59
Free shipping • In stock
Other lengths:
Signal Loss — 250 ft
Approximate insertion loss for this 250 ft LMR400 ULTRA FLEX Times assembly at common RF frequencies.
| Frequency | Loss / 100 ft | Loss — 250 ft |
|---|---|---|
| 100 MHz | 1.6 dB | 4 dB |
| 450 MHz | 3.5 dB | 8.75 dB |
| 900 MHz | 5 dB | 12.5 dB |
| 1.8 GHz | 7.2 dB | 18 dB |
| 2.4 GHz | 8.4 dB | 21 dB |
| 5.8 GHz | 13.8 dB | 34.5 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.
RP-TNC Connector
RP-TNC (Reverse Polarity TNC) uses the TNC threaded shell with reversed pin conventions, similar to RP-SMA. It is used on some commercial WiFi access points and outdoor CPE antennas, particularly in older Cisco and Linksys equipment, and offers better vibration resistance than RP-SMA in demanding outdoor environments.
Common Applications
This RP-SMA and RP-TNC cable assembly is well suited for mobile radio installs, rooftop antenna runs, and rack-mounted equipment. The combination of reliable RP-SMA and RP-TNC 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 ULTRA FLEX Times loses approximately 7.2 dB per 100 ft. This 250 ft assembly will have roughly 18 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 FEMALE and RP-TNC 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.
