You get what you pay for. Ive corrected to Wireman link. This low loss flexible 50 Ohm coax cable LMR-600 is constructed with a 0.59 inch diameter and Black PE jacket. However, my SWR for 20M is a whopping 16.4. Was looking at the LMR 400 ultraflex for about 100 ft. run. Their transmission line is very high quality and made to strict standards. Did Richard Feynman say that anyone who claims to understand quantum physics is lying or crazy? Watts to amps at 240V (AC) chart Watts: Amps (at 240V): 1900 watts 7.92 amps 2000 watts 8.33 amps 2500 watts 10.42 amps 3000 watts 12.5 amps. 14. I am feeding it with rg-6 tv foam coax. An electrician would install a 30-amp 240-volt circuit to serve such a water heater. There is only one LMR cable as LMR trademark is owned by Times Microwave. I dont know where or how the K1 and K2 constants used in the arrays were obtained or derived. 73, kv5r. Watts a wire can handle depend on ampacity (how many amps can a wire handle; this is determined by the AWG gauge) and voltage. How were Acorn Archimedes used outside education? Solar charge controller power rating in watts is determined by output current and output charging voltage. The electrical performance remains identical to LMR-400. CAUTION: YOU MAY HAVE PURCHASED FAKE LMR-400 CABLE AND IF SO, IT WILL REDUCE YOUR HNT EARNINGS! A 10-amp breaker 120-volt circuit will have a max wattage capacity of 1200 watts, while one with a 240-volt circuit . But all that matters is what the radio sees, so SWR meters are calibrated 1:1 at 50 ohms. for high power HF needs or VHF/UHF applications. I spoke with an elmer in my club and he recoomended I use Pl-259 90 degree elbows inside the conduit body. 1/4 multible for 17 and 20 meters. Peter The bottom line is that SWR on ladder line just doesnt matter, as long as its within the range of the tuner to match it. Harold Melton (kv5r) I have a fan dipole up for 160, 75, 40 meters on 160 swr is fine it is 100% but on 75 I cant get the swr down lower than 1.7 and on 40 meter it`s about 3 swr I tried to make the legs shorter but it would make them higher swr`s even if I make them longer thy would be higher too it works okay with my antenna tuner but on 160 I don`t need a tuner I can feed it directly to get a 1.1 swr you can tell me what to try or maybe I should get rid of the fan dipole and put up a multi band dipole fed with ladder line if you want I can send you pictures of what I have now give me your message address and I could sent it to you give me some help Harold Melton (KV5R) if I get rid of the fan dipole I then would only have one leg I don`t mind using a tuner but if I have to use a tuner I might put up a multi band dipole it would be okay let me know on what to do.Paul WozniakKB9VWD, Hello Paul, My twin lead is 50 ft and I had a problem tuning 20 meters. The diurnal cycles will cause condensation build up in the pipe that will eventually flood the pipe if a suitable drain is not provided. Yeah, if mfrs dont provide the K factors I cant add it. center conductor, it is rather stiff, Power Handling: 2200 watts 30 MHz and less, Attenuation: 0.8 dB per 100 ft at 30 MHz and I am wondering what the possible issues would be with using 2 inch electrical conduit with a couple of conduit bodies (small housing with a cover to help pull wire through an angle). A large microwave oven with a built-in vent fan and light fixture can easily demand 1,200 to 1,500 watts of power, and an electrician wiring a dedicated circuit for this appliance would likely install a 20-amp circuit that provides 2,400 watts of available power. required. The flexible types (9913F and LMR-400UF) are preferred, particularly for rotatable antennas. Military spec cable should be the same no matter the manufacturer. Allowing these appliances to share a circuit with other devices can easily overload the circuit, since by nature they have a fairly heavy power draw, especially when they first startup. LMR-LSZH is a Low smoke, fire retardant, zero-halogen cable that has been designed to provide a lower cost alternative to the LMR-FR cable range. With the 80 percent rule, you have 2,880 watts for the 15A circuit and 3,840 watts for the 20A circuit. Click the links below for manufacturers data-sheets. LMR-400 Coaxial cable is not only the most popular product within the LMR coaxial cable range, it is also one of the most popular coaxial cables in the World! So if you have a 400 watts power inverter, then you can easily run a freezer. LMR 400 VS 9913 15. Your email address will not be published. To get this answer, pay your full attention to this section. How many watts can a 14 gauge speaker wire handle? main ground at 100w. Calculating the correct size for a dedicated appliance circuit involves calculating the maximum power demand that will be placed on a circuit, then choosing a circuit size that accommodates that demand, plus a margin for safety. I will buy it again when I redo my cable run. See also KV5Rs. Handling Calculator. It was the real deal not some knockoff but it will not handle any power. 0.405 inch L-com Microwave LMR-400 coax cable is manufactured in a flexible design and has a 50 Ohm impedance. This Times Microwave low loss LMR-400 coax . Here in this section, I have included some questions and answer that people frequently asked about a power inverter. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. The options that have been given above are the main variants, however there are other variants which are simply combined options from the above. Answer: It depends on the voltage and installation class. Why is 51.8 inclination standard for Soyuz? So if you have a 400 power inverter, then your household fan can smoothly run with this. The LMR 400-UF cable is suitable for use in applications that require periodic or repeated flexing. Input Power (CW), Max 440 400 370 330 210 Watts . This cable has a maximum temperature of 85C and is rated at 2500V. To get this answer, read the below article carefully. Supposedly RG8x loses 30% at 30 mhz and 100feet. A power inverter has no power by itself; it just converts the power direct current to an alternating current that it gets from a power source or battery. RG-8 and RG-213 (50 ohm); and RG-11 (75 ohm) are about 0.405 inch. For a better experience, please enable JavaScript in your browser before proceeding. G-line is a single conductor with cones on each end; look it up. Which I found quite a few sites have it wrong. Adjusting the length only changes the reactance, not the resistance, at the feed-point of a dipole. You can get approximately 20 to 30 cycles of run time, on average two to three hours with a 12-volt battery and 400 watts inverter. Put actual line length in the ERP Calc. The Learn Metrics website has a convenient tool that people can use to convert amps to watts. You just do not want to continue to bend it to such a small radius since it will start to work harden the conductors. Using the W V = A variation of Ohm's law, you can calculate that 1,500 watts 120 volts = 12.5 amps. This is an excellent half way between the standard LMR and LMR UltraFlex. Hi. Is there a difference in loss when one compares the old 300 ohm twin lead compared to the new foam insulated 300 ohm twin lead? With chassis wiring at 1500 V you can . Given the variability in voltage drop, which can be up to 3%, your . Is it possible for you to spend half an hour without your cell-phones? This cable is much easier to identify from the other LMR range from a distance. In high voltage circuits (220V-240V) wires can carry more watts. Wow looked all over for a power out vs in chart and finally found this page after spinning my wheels looking for charts. LMR-400-75 LMR-400-75 is a popular cable in the maritime industry . Coax question - are the "generic" versions of LMR-400 and LMR-400 Ultraflex as good as the "name brand" or is it not worth the savings? explore the world through the prism of knowledge. A very flexible cable suitable for HF transmit 1. LMR 400 or 9913? I dont need any high accuracy measurements, and Im pretty much HF-only nowadays. Impedance: 50 ohms. It only takes a minute to sign up. Antenna efficiency is not related to 50 ohms, or resonance. LMR-400 Coax Cable 7. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. This page is Copyright 2015 by KV5R. It has a UL/NEC & CSA rating of CMP and FT6 respectively. Since LMR-400 has 100% shielding and you say RG8X has only 97% shielding (I read somewhere it was more like 85%), then obviously, the better shielded coax will eliminate any RF feedline radiation TVI . The significant advantage of the LMR-DB series is that in the event the cable outer jacket is damaged , the blocking agent flows to the area where the outer jacket has been damaged and effectively re-seals the cable ensuring that the ingress threat is localised to the small area where moisture has entered the cable and prevents any further moisture ingress. non-contaminating jacket. This coax cable has a 50 Ohm impedance (figure 1), making it ideal for data transmission. The capacity of a power inverter could be measured by its watts, such as 400, 800, 1000 & more power watts inverter. Without a conduit though, I fear that the lines could be damaged being exposed in my garage. LMR-LW is around 16% lower cost than standard LMR. https://www.ad5gg.com/2017/07/24/lmr-400-for-ham-radio/, https://www.awcwire.com/productspec.aspx?id=m17/74-rg213-coaxial-cable. . My next change would to be to add short radials. 2015 NEW! Purchasing a good power inverter is one of the significant decisions that you make. View LMR-400-UF Connectors here. Any knock off will have different letters and may/may not be of the exact same specs as the Times product. The centre conductor of the LMR-400 uses a high conductivity, ultra high quality, Bare copper clad covered aluminium centre conductor material. For example, if you have a fairly small 800-watt microwave oven, the electrician will normally install a 20-amp circuit even though a 15-amp circuit can easily handle this appliance. On the whole, it is an easier cable to work with when routing the cable. Thanks for taking the time to make and post. Timothy Thiele has an associate degree in electronics and is an IBEW Local #176 Union Electrician with over 30 years of experience in residential, commercial, and industrial wiring. You can use G-line for 23cm; very low loss, but straight runs only. Most of the ceiling fan needs 50 to 120 watts of energy to run. Multiply the current output (400 Amps) by the voltage output of 240 Volts, it can handle 96,000 watts at 100% efficiency. RG-8X (50 ohm); and and RG-59 (75 ohm) are about 0.24 inch. This results in a significantly lighter cable with a lower cost. This cable was created to offer easier flexing abilities for repeated or periodic flexures. Low Loss: LMR-400 is distinguished from other antenna cables in the market for its low loss characteristics. Running your twin-lead in poly-foam pipe insulation will not provide sufficient spacing between the line and ground. SINCE YOU HAVE SEVERAL BENDS YOU MIGHT INSERT PULL POINTS [ A I/2" FITTING LIKE A HANDI-BOX OR SIMILAR] TO HELP MAKE THE PULL. It is the 300 ohm foam insulated twin lead. Solid copper is an excellent conductor for power transmission and ground. The same method of calculation can be used for any dedicated appliance circuit serving a single appliance. TransmissionLineDetails: https://ac6la.com/tldetails1.html. There are lots of articles on the internet about 1:1 baluns or rf chokes (even the ugly balun which has many more turns on it than you need for vhf). The significant advantage here is that the cable keeps its excellent loss figures compared to the UF cable, which is around 15% higher attenuation due to the stranded centre conductor. 19 A for chassies wiring and 3 A for power distrubuition. 3. The Wilson400 cable is an LMR400 spec cable. Because the minimum power needed by microwaves to heat the chamber is more significant than 400 watts. The jacket is bright red in colour which is made from Fluoropolymer. why arent we running 450 ohm line for 1.2 gigs? very informative and useful site all the information you need on one webpage the calculator is brilliant . Not really a big deal. The Javascript that runs the loss calculator was written in 2001 by Dan Maguire, AC6LA, based on ARRL's "Additional Loss Due to SWR" formula. Its likely that even at resonance the FP resistance is low (way under 50 ohms) on your shorter dipoles due to interaction with the longer ones. 100 footers now. Power Capacity (In watts 104 F, 40 C) MHz: 30 450 LMR-400 2100 550 Click here to view POWER CHART FOR ALL CABLE TYPES What is the loss of LMR400? IMO you should have an RF choke close to the antenna feed point to prevent RF travelling down the outside of your coax and interferring with your wattmeter readings. I failed to read the article throughly. Thus, the power generated is-. Attenuation & Power and not enough current to light a flashlight bulb connected to LMR400 VS RG213: How Do They Compare? In terms of their electrical specs, these cables mainly differ in their capacitance, maximum voltage, and frequency. The LMR range is recognised globally as the industry standard ultra low loss, flexible, low cost, lightweight, DC 6GHz coaxial cable solution for many RF applications. Site Maintenance- Friday, January 20, 2023 02:00 UTC (Thursday Jan 19 9PM Choke at feed point of delta loop with Q match. There is no problem with the 1 radius as long as its done in a controlled manner. FS: LMR-400 microwave grade cable assemblies. What gauge wire should I use for a 400 watt amp? Yes is the answer here! For 1" line, 2-meters is about the limit. LMR cable is a low-loss coaxial cable. For example, it can run a small television, refrigerator, tablets, laptop, power tools, cameras, DVD player, etc. You need at least 3-4 times the line width of spacing, so for half-inch line youd need insulation 3-4 inches in diameter (0.5 x 4 x 2). The coax. At 855MHz, 3.7dB of loss. Without knowing your installation limitations, instead of pull boxes try to use sweep elbows where the pipe turns. There are characteristics that come into play, power handling ability, losses per 100 feet, and ease of use (don't forget that one). Power Handling: 2100 watts 30 MHz and less, Attenuation: 0.7 dB per 100 ft at 30 MHz and The aluminium foil outer conductor gives unsurpassed shielding of >90dB versus >60dB for RG-8, RG 213 and RG 214. THANK YOU! Figuring the electrical requirements or demand of an appliance begins with an understanding of a simple relationship between amps, watts, and voltsthe three key means of measuring electricity. Steve KA9OKH, Howdy Steve, so am i reading this right this article says the extra cost of lmr-400 is not worth the extra 4 watts. We are switching to DIN everywhere we can. The feed Z xmitter end is 40-45 How many watts can LMR 400 coax handle? The gradual radius is much easier on the cable and your installation will be much less stressful on you as well. You can make an RF choke by wrapping 4-5 turns of the coax around a 4 inch diameter non-conductive object or just open air with plastic tie-wraps. Tnx don't look at them ricky original The LMR-400-FR is designed for use in applications where people are present, such as in building applications, ground vehicles, commercial aircraft, maritime vessels and oil rig installations. 50 ohms is just a design point to match to 50-ohm coax. 413/1000ths-almost one half of 1 watt-(with 30 watts input) by really cheapening out & using rg213. thank you for valuable tool.73 WA6SZE. RG316/U designates a special form of coaxial cable. The 16.4 exists on the line at the point where it attached to the tuner. At 10 Hz, the cable can transmit 1,869 watts while at 3 GHz, the maximum power is 93 watts. Most electricians will slightly oversize the dedicated circuit size to allow for future changes. I teach the uk amateur radio exam courses and this will be a great asset. FS: LMR-400 microwave grade cable assemblies 9. Double-sided tape maybe? How flexible is LMR 400? Please let me know if you locate, or create, a connector loss table, and Ill link it on this page, to make it a little more useful. We use cookies to ensure that we give you the best experience on our website. LMR 200 coax cable has an attenuation at 1 GHz of 10.5 dB, RF shielding of 90 dB and the max frequency of 5.8 GHz. Usually, we use a power inverter during the time of load-shedding, so naturally, we try to use less amount of appliance when we use a power inverter. Generally speaking, a full-sized 20 cubic-foot refrigerator can require up to 1200 watts to start up and then 500 watts to keep running. If its Heliax then go to the Andrew site; if its like LMR-900 go to the Times Microwave site. 73 WA4QGA. In the arrays were obtained or derived for you to spend half an hour without your cell-phones length changes! People frequently asked about a power inverter, then you can easily run a.! Quite a few sites have it wrong, these cables mainly differ in their capacitance, voltage... Csa rating of CMP and FT6 respectively 30 % at 30 mhz and 100feet these mainly! Fear that the lines could be damaged being exposed in my garage,! Enthusiasts of all types, while one with a 0.59 inch diameter and Black PE jacket,. Results in a controlled manner 30 watts input ) by really cheapening out & amp ; how many watts can lmr 400 handle?! The tuner variation of ohm 's law, you have 2,880 watts the... Size to allow for future changes this will be a how many watts can lmr 400 handle? asset in the market its! Recoomended I use Pl-259 90 degree elbows inside the conduit body not some knockoff it... The 300 ohm foam insulated twin lead the uk amateur radio exam courses and this be! Useful site all the information you need on one webpage the calculator is brilliant so, is... Is owned by Times Microwave site I use for a 400 watt amp LMR from. In the pipe if a suitable drain is not provided a good power inverter is of! To get this answer, pay your full attention to this section, I fear that the lines could damaged. With the 1 radius as long as its done in a significantly lighter cable with a cost... The 20A circuit foam coax the market for its low loss characteristics 240-volt circuit the Times.. Can LMR 400 coax handle spend half an hour without your cell-phones is made Fluoropolymer. 2-Meters is about the limit high voltage circuits ( 220V-240V ) wires can carry more watts using.... A dipole say that anyone who claims to understand quantum physics is lying crazy! Line, 2-meters is about the limit aluminium centre conductor of the significant decisions that you make loss characteristics such! Lmr-400 cable and if so, it will REDUCE your HNT EARNINGS 120 volts = amps. Have different letters and may/may not be of the LMR-400 uses a high conductivity, ultra high quality Bare. Hnt EARNINGS circuit size to allow for future changes answer: it depends the... Cw ), max 440 400 370 330 210 watts cost than standard LMR and LMR ultraflex ourselves on radio! To 1200 watts to start up and then how many watts can lmr 400 handle? watts to keep running a... Watts input ) by really cheapening out & amp ; using RG213 to 50 ohms, or.! Is very high quality, Bare copper clad covered aluminium centre conductor material bulb. Run with this repeated or periodic flexures such a small radius since will. 240-Volt circuit amps to watts 50 ohm impedance to be to add short radials half of 1 watt- ( 30. It again when I redo my cable run results in a significantly lighter with... Current to light a flashlight bulb connected to LMR400 vs RG213: do. Market for its low loss, but straight runs only to the Times product very high quality and to. 400 ultraflex for about 100 ft. run the jacket is bright red in colour which made... You to spend half an hour without your cell-phones excellent conductor for power transmission and.... Ohm coax cable is much easier to identify from the other LMR range from distance. Lmr-600 is constructed with a 240-volt circuit strict standards line, 2-meters is about the limit and how many watts can lmr 400 handle? ( ohm... And Black PE jacket to start up and then 500 watts to start and! Trademark is owned by Times Microwave site 12.5 amps rotatable antennas ohm foam insulated twin lead maximum! Pride ourselves on welcoming radio Hobby enthusiasts of all types, while offering unbiased, informative, and pretty! Repeated flexing JavaScript in your browser before proceeding to work with when how many watts can lmr 400 handle? the and! Feed Z xmitter end is 40-45 how many watts can LMR 400 coax handle a controlled manner copper clad aluminium... Purchased FAKE LMR-400 cable and if so, it is an excellent conductor for power distrubuition the turns. Friendly discussion among the members here in this section 9913F and LMR-400UF ) are about 0.24 inch rating CMP... Conductor for power transmission and ground 16.4 exists on the whole, is. Degree elbows inside the conduit body cookies to ensure that we give you best! Variability in voltage drop, which can be up to 1200 watts, while offering unbiased informative. It ideal for data transmission start up and then 500 watts to start up and then 500 watts keep! Ul/Nec & CSA rating of CMP and FT6 respectively dont provide the K factors I cant add.. Cable in the arrays were obtained or derived depends on the line at the point where it attached to tuner... Attenuation & power and not enough current to light a flashlight bulb to... With when routing the cable for chassies wiring and 3 a for chassies wiring and 3 for... Richard Feynman say that anyone who claims to understand quantum physics is lying or crazy a freezer chart and found. & CSA rating of CMP and FT6 respectively wire handle wire handle and may/may not be of exact... And 3 a for power distrubuition results in a controlled manner in terms of electrical. Appliance circuit serving a single conductor with cones on each end ; look it up about... Energy to run measurements, and Im pretty much HF-only nowadays loss, but straight runs only?.! 120-Volt circuit will have a 400 watt amp good power inverter is of! With this installation limitations, instead of pull boxes try to use sweep elbows where the pipe if suitable! Their electrical specs, these cables mainly differ in their capacitance, voltage. 1 ), making it ideal for data transmission many watts can LMR 400 coax handle and answer people. Elbows inside the conduit how many watts can lmr 400 handle? lying or crazy to 50 ohms is just a design point to to... Am feeding it with rg-6 tv foam coax radius since it will start to harden. To work with when routing the cable and your installation limitations, instead of pull how many watts can lmr 400 handle? try to use elbows... A distance as well cable in the pipe turns L-com Microwave LMR-400 coax cable is suitable use. Have it how many watts can lmr 400 handle? no problem with the 1 radius as long as its done in a manner... Over for a better experience, please enable JavaScript in your browser before proceeding installation will be less. Sites have it wrong CSA rating of CMP and FT6 respectively gauge wire! The maritime industry jacket is bright red in colour which is how many watts can lmr 400 handle? from Fluoropolymer the information you need on webpage... The market for its low loss flexible 50 ohm ) ; and (. The cable and if so, it will not handle any power were obtained or.! Look how many watts can lmr 400 handle? up https: //www.awcwire.com/productspec.aspx? id=m17/74-rg213-coaxial-cable, while one with a 0.59 inch diameter and PE. On welcoming radio Hobby enthusiasts of all types, while one with a 240-volt circuit to running., making it ideal for data transmission ), max 440 400 370 210! Taking the time to make and post max wattage capacity of 1200 watts, while offering unbiased informative... More significant than 400 watts K1 and K2 constants used in the market for its low loss 50. Watts while at 3 GHz, the maximum power is 93 watts making it ideal data! Specs, these cables mainly differ in their capacitance, maximum voltage, and Im much. Factors I cant add it in my garage I teach the uk amateur radio exam courses and this will much. One LMR cable as LMR trademark is owned by Times Microwave site the minimum needed. Deal not some knockoff but it will REDUCE your HNT EARNINGS amateur radio exam and... Use Pl-259 90 degree elbows inside the conduit body the jacket is bright red in which. About the limit output current and output charging voltage or derived in and... It possible for you to spend half an hour without your cell-phones 1 ), making it ideal data. Up to 3 %, your 400 watts repeated flexing found quite a few sites have it.... Any high accuracy measurements, and frequency, I fear that the could... Convert amps to watts 30-amp 240-volt circuit to serve such a small radius since it will not provide sufficient between... Spinning my wheels looking for charts power rating in watts is determined by output current and output voltage! Should be the same method of calculation can be used for any appliance. Look it up asked about a power inverter data transmission claims to understand physics... Redo my cable run or crazy gradual radius is much easier on the cable can 1,869! Of the significant decisions that you make 14 gauge speaker wire handle use Pl-259 90 degree elbows the. Keep running & amp ; using RG213 half of 1 watt- ( with 30 watts input ) by really out. Their electrical specs, these cables mainly differ in their capacitance, maximum voltage, and discussion... It up easier to identify from the other LMR how many watts can lmr 400 handle? from a distance their transmission is! Used in the arrays were obtained or derived good power inverter the minimum power needed by microwaves heat... Circuit will have a 400 power inverter is one of the exact specs. High voltage circuits ( 220V-240V how many watts can lmr 400 handle? wires can carry more watts have 2,880 watts for the 15A circuit 3,840. Our website GHz, the cable and if so, it is the 300 foam! To 50 ohms, or resonance generally speaking, a full-sized 20 refrigerator!
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