Quick Reference
LMR240 Times Coaxial Cable
50 Ohm • DC – 6 GHz
LMR-240 is a Times Microwave 50-ohm low-loss coaxial cable with a 0.240" outer diameter and excellent flexibility for its size. Designed for medium-length runs up to 75 feet, it is widely deployed in cellular infrastructure, public safety radio, GPS distribution, and anywhere a balance of low loss and easy installation is required.
LMR240 Times Attenuation
Signal loss in dB per 100 ft at standard RF frequencies.
| Frequency | Loss / 100 ft | Loss / ft | 6 ft | 25 ft | 50 ft | 100 ft |
|---|---|---|---|---|---|---|
| 100 MHz | 2.4 dB | 0.024 dB | 0.14 dB | 0.6 dB | 1.2 dB | 2.4 dB |
| 450 MHz | 5.3 dB | 0.053 dB | 0.32 dB | 1.33 dB | 2.65 dB | 5.3 dB |
| 900 MHz | 7.5 dB | 0.075 dB | 0.45 dB | 1.88 dB | 3.75 dB | 7.5 dB |
| 1.8 GHz | 10.8 dB | 0.108 dB | 0.65 dB | 2.7 dB | 5.4 dB | 10.8 dB |
| 2.4 GHz | 12.6 dB | 0.126 dB | 0.76 dB | 3.15 dB | 6.3 dB | 12.6 dB |
| 5.8 GHz | 20.6 dB | 0.206 dB | 1.24 dB | 5.15 dB | 10.3 dB | 20.6 dB |
LMR240 Times Power Handling
Approximate maximum continuous power (CW) at 25°C ambient.
| Frequency | Max Power (W) |
|---|---|
| 100 MHz | 200 W |
| 450 MHz | 90 W |
| 900 MHz | 60 W |
| 1.8 GHz | 40 W |
| 2.4 GHz | 33 W |
| 5.8 GHz | 18 W |
Construction & Materials
Center Conductor
Bare copper clad aluminum, 1.42mm
The center conductor carries the RF signal. Material and diameter affect DC resistance, skin effect losses, and overall attenuation.
Dielectric
Foamed PE
The dielectric insulator separates the center conductor from the shield. PTFE dielectrics offer superior temperature stability and lower loss versus polyethylene.
Shield
Aluminum foil + tinned copper braid
The outer conductor provides the return path and shields the signal from external interference. More braid coverage means better EMI rejection.
Jacket
PE
The outer jacket protects the cable from physical damage, UV, chemicals, and moisture. PTFE and FEP jackets handle higher temperatures than PVC.
Velocity Factor
84% (c)
How fast the signal travels relative to the speed of light in vacuum. Higher velocity factor means shorter electrical wavelength per foot — important for phased array and delay-matched applications.
Max Voltage
600 VRMS
The maximum continuous operating voltage. Exceeding this can cause dielectric breakdown. Relevant for high-power transmitters and pulse applications.
Available LMR240 Times Assemblies
Choose a connector combination to see pricing and order. All assemblies are hand-built and ship free within the USA.
SMA MALE to SMA MALE
From $15.99
SMA FEMALE to SMA MALE
From $15.99
RP-SMA MALE to SMA MALE
From $15.99
RP-SMA FEMALE to SMA MALE
From $15.99
N MALE to SMA MALE
From $16.49
N FEMALE to SMA MALE
From $16.49
BNC MALE to SMA MALE
From $16.99
RP-TNC MALE to SMA MALE
From $15.99
SMA MALE to TNC MALE
From $15.99
PL259 UHF Male to SMA MALE
From $17.99
SMA MALE to SO239 UHF Female
From $17.99
SMA FEMALE to SMA FEMALE
From $15.99
RP-SMA MALE to SMA FEMALE
From $15.99
RP-SMA FEMALE to SMA FEMALE
From $15.99
N MALE to SMA FEMALE
From $16.49
N FEMALE to SMA FEMALE
From $16.49
BNC MALE to SMA FEMALE
From $16.99
RP-TNC MALE to SMA FEMALE
From $15.99
48 more configurations available on the LMR240 Times page.
Frequently Asked Questions
What is the impedance of LMR240 Times?
LMR240 Times is a 50 Ohm coaxial cable. All standard RF systems (antennas, transceivers, test equipment) use 50-ohm impedance, so LMR240 Times connects directly without any matching network.
What frequency range does LMR240 Times support?
LMR240 Times is rated DC – 6 GHz. At higher frequencies, the attenuation per foot increases, so actual usable range depends on acceptable signal loss for your application.
How much signal loss does LMR240 Times have?
LMR240 Times has 2.4 dB of attenuation per 100 ft at 100 MHz, rising to 20.6 dB per 100 ft at 5.8 GHz. Use the attenuation table above to calculate loss for any specific length and frequency.
Are CoaxRF LMR240 Times cable assemblies made in the USA?
Yes. Every LMR240 Times assembly is hand-terminated and continuity tested at our US facility. We build each cable to order — nothing is pre-made or drop-shipped from overseas.
Can I order a custom length of LMR240 Times?
Yes. In addition to our standard lengths (1, 6, 25, 50, 100 ft and longer), we accept custom-length orders through the Cable Builder. Custom assemblies ship within 1–2 business days.