Cable
RFC400
End A
TNC FEMALE
End B
TNC FEMALE
Specs Summary
25 ft RFC400 — TNC FEMALE to TNC FEMALE
RFC400 cable assembly, 25 feet, with TNC FEMALE and TNC FEMALE connectors. Hand-assembled, tested, and ships free within the US.
25 ft — TNC FEMALE / TNC FEMALE
$55.98
Free shipping • In stock
Other lengths:
Signal Loss — 25 ft
Approximate insertion loss for this 25 ft RFC400 assembly at common RF frequencies.
| Frequency | Loss / 100 ft | Loss — 25 ft |
|---|---|---|
| 100 MHz | 1.5 dB | 0.38 dB |
| 450 MHz | 3.3 dB | 0.83 dB |
| 900 MHz | 4.7 dB | 1.18 dB |
| 1.8 GHz | 6.8 dB | 1.7 dB |
| 2.4 GHz | 7.9 dB | 1.98 dB |
| 5.8 GHz | 13 dB | 3.25 dB |
About This Assembly
RFC400 Cable
RFC-400 is a cost-effective 0.400" 50-ohm low-loss coaxial cable serving as a value-oriented alternative to LMR-400. It delivers strong performance on runs from 50 to 200 feet and is popular for cellular repeater trunk cables, outdoor antenna feedlines, and budget-conscious infrastructure deployments.
TNC Connector
TNC (Threaded Neill–Concelman) is the threaded version of BNC, offering improved performance up to 11 GHz and better vibration resistance through its screw coupling. It is commonly used in mobile radio antennas, avionics, and outdoor installations where BNC's bayonet lock would not provide sufficient mechanical security.
Common Applications
This TNC cable assembly is well suited for cost-effective long antenna runs, cellular repeater trunk cables, and outdoor feedlines. The combination of reliable 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 25 ft?
Yes. This page is for the 25 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 25 ft cable?
At 1800 MHz, RFC400 loses approximately 6.8 dB per 100 ft. This 25 ft assembly will have roughly 1.7 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 TNC FEMALE and TNC 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.
