Lmr400 vs rg8. LMR-400 is foam PE dielectric, RG8 is solid PE.

Lmr400 vs rg8. The specs on all of them are different (even if they are the same diameter) due to other factors. Heliax cable. LMR-400 has a maximum power rating of LMR-400 is foam PE dielectric, RG8 is solid PE. 3 mm (compared with 10. From: Eric Lemmon WB6FLY Subject: [Repeater‑Builder] Double-Shielded Coax In recent postings to the list there have been several references to the need for double-shielded coaxial cable when hooking up components within a repeater cabinet. Feb 6, 2013 · It's about the same size as RG-213, but is way more efficient. It has a lower level of signal loss than RG6, which makes it a better choice for longer cable runs. This article will provide the complete details of LMR240 and LMR400, as well as the distinctions between them. reverse polarity, and a choice of solder or non-solder LMR-FR is UL/NEC & CSA rated‘CMR’ and ‘FT4’ center pins Feb 13, 2015 · The difference between a long run of RG8 at 850 MHz compared to LMR 400 could be enough for your scanner to not decode a digital signal. Mar 7, 2024 · Designed as a drop-in replacement for RG8/9913 air-dielectric type cable and suitable for short antennas and feeder runs in wireless communication systems, LMR400 also meets the demands of applications necessitating low-loss, easily routed RF connections. lmr 400 , is about $1. You can still use LMR 400 for HF. Now I want to put a new piece of cable on it. It features loss of about 3 dB/100' and is suitable for runs up to about 250'. This article is going to talk about the detailed information about RG8 and LMR400, and interpret the differences between them. In the past I have used RG-8, RG-8X, Beldon 9913, and RG-214 coax throughout my 45 years in radio. LMR-400 is stiff, I would suggest using a short jumper of RG8X or LMR-240UF at the radio unless you mount it to the desk. Both are double jacketed. of 84~85% NOTE: I am sure this will get some flames going but for any coax that uses a "foam" dielectric, I recommend using a clamping style connector. Even LMR 400 is inefficient compared to 7/8 in. The inert flooding compound completely eliminates all paths of water migration and ingress for long term reliability (10 year warranty). This preservation of signal strength ensures that the transmitted signal arrives at its destination with minimal degradation. 4. 5db loss per 100 feet. Jul 3, 2014 · RG8/213 LMR400 type, 1/2Inch superflex, 1/2inch hard line also known as Heliax, 7/8inch hard line. However, stranded center conductors have a little higher loss than solid ones. To make antenna installation easier and friendlier for maintenance I was planning on using RG8x on the actual antenna installation and tie in the LMR400 about 15 feet away from the antenna to the RG8x at the top of the tree. Which cable is killing your signal? I need a 75' length of cable w/ PL259's. LMR-400 also out perfroms LMR-240 when comparing hte power ratings. . Aug 6, 2021 · In Part 1 of our series on Choosing the Right Coaxial Cable, we looked at the benefits of DX Engineering RG-214 Double-Shielded 50-ohm Coaxial Cable—an excellent choice for outdoor applications […] Jun 29, 2013 · For example, the HF ham antenna on my roof is connected to my transceiver using LMR-400. Times LMR-400, Andrew WBC-400, TerraWave TWS-400 and Belden RF400 are pretty much identical products. 0dB/100' 4. Suitable for VHF (~1. 6dB for the same 33 metre cable run at 400MHz when we really want a good low loss system. I have removed the old cable and the antenna element and cleaned it all up. LMR-400 is a type of coaxial cable that is commonly used by amateur radio operators. This new antenna only has 14 feet of RG58, so for such a RG58 vs RG8 X vs RG8, RG213 Vs LM400 VHF cable. But why buy a $1000+ transceiver and then cheap out for a few bucks on the cable? Explore the differences between LMR 400 and RG213 to determine which coax cable performs best for your radio setup. This article is going to talk about the detailed information about LMR240 and LMR400, and interpret the differences between them. WLL, GPS, LMR, WLAN, WISP, WiMax, SCADA, Mobile Antennas). KMR400 - searching for LMR turns up a lot of "Just use KMR, it's pretty much the same!". All coax cable has a certain amount of signal loss. However, it offers better performance in terms of frequency range, attenuation, and power handling. Feb 13, 2015 · I got both and they look the same and I did a little googling but I want to hear from someone what they think about both kinds of coax. What I did is run semi-flexible Heliax I just happen to have except for a small jumper at the antenna, and a longer jumper of decent double-shielded coax once inside the room. Which should i use for which? I do have a few repeaters around my area, but was told the loss is greater if using the rg8 with the vhf rig. The physical and electrical properties are comparable with the RG58/U and RG8 cable. LMR-400 is a little lower loss, and has a better (one-time) bend radius spec. 81 for a velocity factor. HF only. Going to put up my yeasu 2500 and my Ranger radio with my 225 amp. What are the applications of LMR-400 cable? LMR-400 excels in wireless communication systems as a substitute for RG8/9913 air-dielectric cables. May 25, 2023 · LMR-400 | KMR-400 Specs: 50 ohm, ~10 AWG (Estimate) Notes: The AWG rating of LMR-400 cable is not typically specified because it uses a different classification system called the Military Specification (MIL-SPEC) designation. RG-400 vs. I'd use RG213 or RG214. Catalog Apr 24, 2022 · RG8 and LMR400 all coax cables. Here is a nice coax loss calculator. (Read 11643 times) 0 Members and 1 Guest are viewing this topic. Is it? 2. For Rx-only, RG connectors will also fit. May 23, 2012 · RG-8X has much more loss than RG-213. Contact today. Compare RG213 and LMR400 coaxial cables to find the best for your setup. LMR-240 has a maximum attenuation of 8. DX Engineering Coaxial Cable Reference Chart DXE-400MAX Low-Loss Cable DXE-8U Low-Loss 50 ohm 50 ohm Foam Dielectric Cable Oct 26, 2024 · By understanding the key differences between RG58 and LMR400 cables, readers can make informed decisions when selecting the appropriate cable for their specific needs, whether it’s for a home wireless network or a complex communication system. Oct 21, 2020 · 400MAX / LMR400: Though this cable is generally the most expensive of those listed, it provides some of the lowest attenuation figures. Not all 1/2" hardline is the same. Use Times Microwave's LMR-400 cable for any application that necessitates a low-loss, conveniently routed RF cable (e. dxengineering. LMR400 is designed for jumper assemblies in wireless communication systems, or as a drop-in replacement for RG8/9913 air-dielectric type cable and short antenna, feeder runs. Measurable difference but emperically not significant so pick whichever you're more comfortable with. The shielding conductor of these cables is another significant difference that sets LMR400 vs RG213 coaxial cables apart. Jul 23, 2015 · Belden 9913 bends more than lmr 400, hence much easier to work with. Mar 16, 2013 · LMR-400 and it's knockoffs are the same size and use the same connectors as RG213 and they have a V. 992dB at 2000MHz. 8db for 100' (a 3db loss would cut the power in half). The Belden equivalent is 9913. From RG-6 to LMR®600 spec, to variation in ohmage and manufacturer, we cover it all. Our Cable Reference Guide will inform you about the coaxial cable types and recommendations for use. Although there are many similarities between LMR400 and RG213, there are a few differences that distinguish them. (Belden 9914 has more loss per foot. The Ultraflex version is still pliable enough to use with antenna/rotator combos if you provide a generous bend radius. Here's a quick line loss calculator to use Note that the simple program used for this web page gives a very close approximation for additional losses due to SWR. Choices are: New RG58, RG8X, RG8, RG213, LMR400. LMR400 cable has better RF shielding and significantly lower attenuation than RG8 coaxial cable. RG-213 vs LMR-400 Which Cable Is BEST for Ham Radio? Getting A Hole In One With Cheap Coax And A Look At 400MAX Coax By YouTube Ham Radio Elmer Jim W6LG Oct 13, 2024 · 1. If yo google RG8U you get more results for regular RG8 or RG8X??? DISCUSS PLEASE!!!! Jul 12, 2022 · I have SWR of 1. Plus the fact that the center conductor, insulations (dielectric) and shield braid are bigger with LMR400 which helps reduce loss. Mar 4, 2022 · RG58 and LMR400 all coax cables. Mar 27, 2012 · I am trying to understand the difference in the RG8 (suffix) coaxes. I assume the LMR400 cable is a lower loss cable than RG8X, but exactly how much lower for a 50' run at around 806-866MHZ? What kind of difference is there between the RG58, RG8X, and LMR400 when it comes to loss? Also, what is the difference in diameter between these cables? Explore LMR® coax cables with flexible, rugged, and low-loss 50 Ohm RF solutions for wireless systems, antenna feeds, and high-performance broadband applications. 1 and 1. LMR-400 Cable is a flexible high-frequency and low-loss coaxial cable with an ultraviolet-resistant polyethylene outer jacket and service life up to 20 years. This offers a higher quality communication clarity and Aug 30, 2023 · In this article, we will delve into a comparison of four popular coaxial cable types – two Radio Guide (RG) types, RG6 and RG58 – as well as two Land and Mobile Radio (LMR) types, LMR240 and LMR400. Nov 20, 2024 · The double shielded composition of LMR-100, LMR-200 and LMR-400 enables far better preservation of signal strength than the single-shielded coax types that they are most typically compared to (RG-174, RG-58 as examples): The LMR-100, 200 and 400 coax types have in-built shielding from both an aluminum layer providing 100% coverage and a denser The following charts measure the attenuation (loss) of different types of coax at 50 and 100 foot lengths for each of the amateur radio bands. Heres my question, i have 100ft of both rg8 and rg213. LMR400 vs RG8 Coaxial Cable Comparison Guide This article explores the features, uses, and comparisons of LMR400 and RG8 coaxial cables, helping you understand which cable might be the best fit for your needs. These distinctions can make a major impact when it comes to determining which cable would work best for your electrical needs. Today, easybom will discuss the specific details regarding RG213 vs LMR400 and how to distinguish between the two. Apr 11, 2022 · LMR240 and LMR400 all coax cables. RG8 Coaxial Cable Specifications Special LMR Products LMR-DB: Watertight flexible coax meets Industry Standard watertightness tests ASTM D4565, REA PE39, ANSI S-84-608 while maintaining the same excellent performance properties as standard LMR. 100 feet of LMR-400 will loose 5. [ MyGMRS STAFF EDIT: 3 Photos no longer available from linked source. It's especially effective for short antenna and feeder runs, offering a straightforward solution for establishing low-loss RF links. LMR400 has lower loss and better shielding, making it more suitable for longer cable runs and higher frequencies. What is RG213 cable used for? Mar 13, 2019 · LMR 240 is RG8X size wise just as LMR 400 is RG8. How much signal are you actually losing on the way to your antenna? Are the coax attenuation charts correc Jul 6, 2014 · I just made a 1/4 wave ground plane antenna. Terms of useThank you for accessing the website of IC-Components. Bill Oct 27, 2002 · I'm attempting to decide between LMR400 and RG8X cable to replace the lossy RG58. Let's empirically compare RG8X and LMR400 coax. There is also a version called LMR-400-75, the only LMR cable capable of running at 75 ohm. For example, Belden 8237 and Belden 9913 are both RG8U style coax, but have different loss numbers. This article is going to talk about the detailed information about RG58 and LMR400, and interpret the differences between them. com We respects your privacy and takes your online safety seriously. LMR-400 is also an RG8 spec coax. Dec 23, 2020 · LMR-400 coaxial cable. 3 moving radio shack to a different room I need 75 feet of coaxial cable going from my radio to my center fed pole connection, the hard question is DO I HAVE TO use LMR 400 or can I get away with the RG8 X coaxial cable ,is 75ft run to long??? Mar 18, 2023 · LMR 400 is a higher-end cable and comes with a higher price tag than RG8. Many would say this is silly, because there is not a lot of difference between cheaper RG-8 or even RG-58 and the better LMR-400 at HF frequencies. Trusted for over 30 years. Apr 12, 2011 · Going to setup a base. 2/3 of it will be an outside vertical run. Instead, it was built to be a very thick and powerful cable for long distance runs. 5 Hardline type 150Mc 450Mc Flexible Communications Coax Times LMR cables are high performance broadband, flexible, cables designed low loss 50 for Ohm use in coaxial communication such as: wireless applications Dec 1, 2004 · Common Coaxial Cable SpecificationsThe table above gives 0. Nov 18, 2024 · A detailed guide that discusses the characteristics of the LMR-400 coax cable. I have seen one book that mentions only 1/2 inch and 7/8 inch and gives 0. 88 as the velocity for all LDF series cables. Feb 22, 2011 · The following charts compare various type of coaxial cable used in VHF and UHF data radio systems. Note that the M&P-ULTRAFLEX 7 despite being just 7. Not havaing the equipment to measure it myself I have no idea as to which is correct. Graphs can be used to calculate the power loss in any way and for any Messi & Paoloni Aug 23, 2015 · The LMR 400 type cables were intended for the much shorter wavelength VHF and UHF frequencies due to the higher losses where the RG8 types are for the broader frequency ranges below 30 MHz. Make sure to use clamp or crimp connectors, soldering a connector to the braid of LMR-400 without melting the dielectric is difficult. LMR-400 [WAS: Duplexer Cable Lengths]1 - 17 of 17 1 Attenuation of Coaxial Transmission Lines in the VHF/UHF/Microwave Amateur and ISM Bands Low loss LMR 400 is crucial in radio frequency (RF) applications, including amateur radio stations. Is LMR400 the same as rg8? Designed to surpass RG8, LMR400 offers enhanced flexibility and decreased signal loss. How does solid vs stranded compare? What about foam? What about 213 & 214 & 9913? Is RG-8X not as good? Is 8U better? I ran across this: "RG8u Coax Cable with a much lower loss than RG58" Mar 12, 2023 · LMR-400 is a high-performance coaxial cable that is often used in demanding applications where low signal loss and high shielding are required. LMR-600 LMR-600 was not made to act as a replacement to RG coax like the other LMR cables. At marine VHF frequencies, it's loss is 4. Designed for antenna feeder jumper assemblies runs requiring a high-performance, flexible, low loss RF cable. It is also easy to install and terminate, and it can support a variety of connector types. Mar 7, 2022 · COAXIAL CABLE, ANTENNA, RG8, 50 OHM, BCC Both RG213 and LMR400 are coaxial cables with a wide range of applications. F. LMR400 vs. LMR®-400 Flexible Low Loss Communications Coax Ideal for Drop-in replacement for RG-8/9913 Air-Dielectric type Cable • Jumper Assemblies in Wireless Communications Systems I also use LMR 400 for outdoor runs from the house to the antenna, but use skinnier, more flexible coax from the antenna switch to the rig. RG400 coax cables giving our detailed analysis and presenting the clear winner. You'll find clear information on each cable’s characteristics, applications, and performance differences to make choosing the right one easier. 70 per foot. Maybe LMR240? Belden 9913F-7? Jul 14, 2025 · In this video, we pit the most popular coax cables in ham radio against each other in a no-holds-barred comparison: RG-58, RG-8X, RG-213, LMR-240, and LMR-400. LMR®- FR is a non-halogen (non-toxic), low smoke, • Connectors: A wide variety of connectors are available fire retardant cable designed for in-building runs that can for LMR-400 cable, including all common interface types, be routed anywhere except air handling plenums. Coax specs If you can get your hands on some 1/2" Heliax, go that route, but LMR-400 isn't that far behind at about 1/2dB difference at 100ft. I use LMR-400 for all of my antennas, and LMR-240 for short inside jumpers between devices. Apr 9, 2022 · The LMR-400 is suitable for both indoor and outdoor use. I've totally changed my mind on what coax I want to use in and around my shack! I always looked to the "ham radio standards" of RG-58 or RG-213 coax cable fo DX Engineering Coaxial Cable Reference Chart DXE-400MAX Low-Loss Cable 50 ohm RG-8/U vs LMR 400 for 100ft run for base antenna ?? The only difference I see is RG-8/UCenter Conductor Gauge:11 AWG , LMR 400 Center Conductor Gauge:10 AWG EDIT: Okay everyone continue discussing this post if you wish but this is the cable I got I think it's gonna work perfectly as this type has in the past Chart https://static. Dec 26, 2010 · Look at 50 Ohm Braided Coax Cable, RG8 Cable | TESSCO 800 472 7373 for comparison. Industry standard manufactured by Times Microwave Systems and available at McGill Microwave Systems. The LMR 400 coaxial cable was created by the American company Times Microwave Systems, which is a leading manufacturer of coaxial cables and related products for the Visit 5Gstore to learn about the types of coaxial cables. 2 dB/100 ft at 1 GHz, while LMR-400 has a maximum attenuation of 10. Mar 17, 2011 · LMR 400 looks to be the best bet without going to commercial hardline/Heliax. For 15 meters you would need LMR240 minimum, but LMR400 is strongly recommended by everyone in the community. It is about 1/4-inch in diameter, and is flexible and affordable. Aug 7, 2025 · LMR400 is often compared to RG8 and cable coaxial RG213 due to its similar diameter and usage. This comment made me realize that I default to a larger cable (LMR-400 or Continue reading Is RG-8X the General RG-58 provides a good balance between price and performance for HF Frequencies and VHF UHF derives fewer losses RG-213 or LMR-400 LMR400. 003 dB, so definitely not worth any expense on that front versus the RG-8/U. When an antenna is connected to a radio modem using any type of coax cable, the transmit signal is attenuated as it passes through the cable, so the … Sep 17, 2021 · So LMR400 uses polyethylene in the construction of its outer jacket which wins for cable protection. The main problem with Heliax/hardline is connector cost. May 16, 2025 · Our complete, easy-to-understand guide to all things coax cable. This article is going to talk about With a 70' run on 70cm/440 you'd lose roughly 2dB of signal strength with LMR-400 or Belden 9913, about 3dB with RG-213. RG58 Cable broke off where it enters the base of the antenna. LMR400 Coaxial Cable This low-loss coaxial cable from Times Microwave has similar external dimensions to RG8 but a larger inner conductor and a dual copper braid and aluminum braid shield. Suitable for higher power (~1800 watts) at HF. Apr 29, 2023 · While doing a presentation about choosing the right coaxial cable, someone suggested that RG-8X (also called “Mini 8”) might be the best general-purpose cable for amateur radio. Or, even better, LMR400 which has a 1. Terminology is getting tricky. I'd say your best bang for the buck would be shortening the RG-8X to 25 feet, and re-purposing the RG-8/U for something more demanding than HF. A comparison of common ham radio coaxial cable types and signal loss. if you put them side by side they look the same. ] now lets talk about the losses in Db and how much power that is. 9913 and LMR-400 are popular “low-loss” RG-8 types. Most of us don't think of it, but the outer jacket of most feedline cabling is flammable, and this factor The plan is to use LMR400 for the run from the shack to antenna which is about 200' total. Are there alternatives to LMR-400? The difference between LMR-240 and LMR-400 is significant, as the two cables have different characteristics they both have a maximum operating frequency of 6GHz. @WRDJ205 your real world measurements are close to what most online coax loss calculators will show. These 50-ohms cables exhibit good attenuation property and at the same time are rugged to be used in outdoor applications. Attenuation is measured in dB. BTW, RG213 and RG8 are the same diameter. Aug 15, 2022 · LMR240 as well as LMR400 the coax cable in all its forms. You should be able to find fairly close pricing between the 213 and the LMR-400. HF frequencies are better off with solid or stranded RG8X type coax even though the spec's you read on losses and velocity factors can make you believe It soon becomes evident why we use low loss cable like CNT-400 or LMR-400 which has a loss of about 2. Jul 14, 2019 · Author Topic: Coaxial cable RG142 RG400 LMR400 confusion. Its versatility across varying environmental situations makes it mostly advantageous in fast-paced settings where quick installations or adjustments arise. The LMR cable is really designed for losses that occurs in coax in the VHF range and above. Although RG‑142/U is widely used by repeater builders, perhaps a better choice for some applications is RG‑400/U (note that RG‑400 is NOT the "LMR DX Engineering Coaxial Cable Reference Chart DXE-400MAX Low-Loss Cable 50 ohm Aug 16, 2022 · Both RG213, as well as LMR400, are coaxial cables that have numerous applications. I've been using cheap RG8 from decades ago that was stored. 3. LMR®-400 Flexible Low Loss Communications Coax Ideal for Drop-in replacement for RG-8/9913 Air-Dielectric type Cable • Jumper Assemblies in Wireless Communications Systems Nov 28, 2015 · RG8 isn't really a single coax, but a general specification for a range of types. It is perfect for its intended use mostly in cable TV, but not recommended for Helium antenna installations, especially on such a long distance like yours. There are no issues with different length cable runs or jumpers from the antenna to the rack, or between racks. There is a lot to like about RG-8X. This is the preferred cable for VHF/UHF use and works very well with HF at 3 kW up to 30 MHz. Discover its key features, compatible technologies, protocols, and apps. All of the LMR 400 is a popular choice for high-power and long-distance applications, as it has a low loss of signal even at high frequencies. Can two runs of LMR400 (or LMR & KMR) run right next to each other without causing problems? I'm assuming that the shielding is plenty for that. However, when compared to LMR400, there are some key differences. Same diameter, same Vf, similar mechanical specs. Be aware that there are several different types of most of these RG type coaxes and you can't assume that one brand's RG8 Mar 25, 2020 · LMR-400 is a proprietary type of low-loss RG-8 made by Times Microwave. The flexible types (9913F and LMR-400UF) are preferred, particularly for rotatable antennas. Otherwise they're not terribly different. 8 dB/100 ft at 1 GHz. What is JEFA? I was set to shop for LMR400 when I found "LMR400/213 type" ads for a BR400 cable. I have another antenna up that has about 30' of LMR400 and it works great. 5dB loss per 100 feet at 146 MHz). I have an 8' VHF antenna. Cable type loss at 100Mc 400Mc RG8/213 2. A few notes which may be helpful: Going from that to 25 feet of LMR-400 only nets you another 0. Great drop-in replacement for RG-8/9913 cables. 2. Oct 8, 2018 · LMR-400 LMR-400 is arguably the most common LMR cable, being a replacement for RG8. 2 2. g. RG8x is smaller at about 1/4" in diameter. Aug 17, 2025 · Pick the right coaxial cable fast. The Low loss coaxial cable minimizes signal attenuation delivering a more power and cleaner signal to the antenna. 22 per foot, while belden 9913 is about $0. Compare RG8X vs RG58, RG6 vs RG11, LMR-400 vs LMR-600—loss, bend radius, connectors—and order custom RF cables from TEJTE. Aug 29, 2023 · Compare With Others LMR400 vs RG8 RG8 is a commonly used coaxial cable that offers good performance at a lower cost. Use a good coax loss chart or calculator when selecting your coax. RG58 has significantly higher loss (attenuation) due to the different insulation and electrical properties. We exam the pros and cons of RG142 vs. Which Apr 8, 2023 · RG8, RG213, RG11, and LMR400 are generally about 1/2" in diameter. Jun 15, 2025 · RG8X has around 86% loss over 100 feet while LMR400 has around 48% loss over 100 feet. It works well but I have been wondering if is is worth the trouble to use LMR400 in place of the RG58 I have now. 7dB/100' LMR400 1. The spec is for the size of center conductor, size of center insulator, and total size of cable (over simplified, but you get the Properties for popular coaxial cables are listed below including Type, Z0, Dielectric, Capacitance, dB. Manufacturer: Belden; 50 Ohm Coaxial Cable (Stranded Flexible Cable); Cable Type: 3/8" Braided Polyethylene Shielded; Shield %: 97% Braid; Impedance: 50 Ohms; COMPARISON CHART - ATTENUATION/POWER RATIO The graphs below give a clear view of the behavior of our top models on a 50 m stretch, compared to the old fashioned RG 213/U. Coaxial Cable Attenuation ChartCopyright 2002-2015, Universal Radio, Inc. However, it stands out because of its innovative construction materials and design that significantly reduce signal loss. To better protect your privacy LMR-400 The LMR® cable series includes the ultra-flexible LMR-400, 50 Ohms coax cable with UV Resistant jacket. Lmr 400 has a better jacket, stands up to weather, heat, cold, sun, coax cracking, but this will occur after 6 or 7 years. 3 mm of RG213/U), outclasses this old item in every parameter. ) Street pricing should be about $1/ft, same as RG. dd4thd h2 sajb p1 p0d0qj n7v6ub6nkp wy 1ijpu mdcp 2ybk

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