Also make sure the doors and hood are closed on the vehicle. If you're using a co-phase, or dual antenna system, the coax cable is rated at 75 ohms per side. The whole purpose of an antenna stud is to isolate the antenna from ground. The message „Attention Construction Site“ can be broadcasted on different channels in seven different languages. But the drop from 1.5 to 1.0 won't make a substantial increase in performance. Please understand that there may be possible delays in delivery/transit times due to carrier restrictions. Press again for information CH 19. The most common cause of a high SWR is an antenna shorted to ground. Make sure that the antenna you are using is the right antenna for your application. To test for this disconnect the coax from the CB radio and CB antenna mount. As far as ch1 being higher, I mean out of ch20, 40 and 1 under the SWR setting. SWR that pegs the needle on all channels almost always indicates a short in your antenna system. The Cobra 29 LTD classic CB has a 9' mic cord so the user can move around while it's in use. Drop in to rag chew or just come check the mail. Replace old or lost tips with these items. Get a dummy load and a jumper and a separate SWR meter, and transmit into that. Also what length antennas? You can read more on what a CB antenna ground plane is here. For your safety follow the installation directions included with your antenna. The PC78LTW also offers instant channel 9 access and soft wave radio (SWR) calibration. Not sure what SWR is? Now that you know how to properly tune a CB radio, explore your options for new CB … Make sure that the antenna will handle the amount of power you are using otherwise you could damage the antenna. What does "Highest" mean. Cobra 29 LTD CB Radio, 40 channel, 4 Watt, Ant. All TEAM cb mobile radios can receive these warning messages. You should try to get it lower, but performance should still be acceptable in this range. If you've tuned the antenna, SWR in this range is likely an issue of a less-than-ideal mounting location for your vehicle and/or an antenna that isn't ideal for the mounting location. Furthermore, it is all but impossible to tune an antenna system using just the antenna warning … If there is continuity, check the nylon washer placement on the stud. 40 Channel Plus CB Antenna, Mechanical Tunable-Tip, 4 Ft (122cm), 5/8 wave, Rate... FS5-B. Make the adjustments and repeat them. This will result in damage to transmitter circuitry.-Safety notice: The antenna used for this radio must be installed to provide a separation distance of at least 20 cm (8 in.) when taking SWR readings. The antenna is designed for both indoor … This CB antenna also features a 6 foot premium quality coax, complete with molded PL-259s. from all persons and must not be co- A PA is also included with this item for those who may want to broadcast. It also has a front-positioned microphone with an extra-long, coiled cord for convenient use. I've used the built in swr calibration and my chAnnel 1 is the highest. It is impossible to have an antenna tuned for every scenario, though, and sometimes they are way off. As mentioned earlier, the only issue that we had with this antenna is that it doesn’t come with a mount, so people who buy it will either need to buy one separately or use the mount from their previous antenna. I'm running a a Cobra 29LX in my 2016 International day cab with dual fire stick fs-II antennas. If that works, THEN it's your antenna system. With the FCC authorization of 40 channels, SSB operation shifted to channels 36–40. The center of the vehicle's roof is the best location. CB antennas need a metal surface under them to transmit correctly. It is very easy to cut too much off and ruin the antenna. A short occurs in the antenna stud when the antenna coupling nut (where the antenna screws in), or the bolt, makes contact with the mount. If you have already optimized your current antenna setup (similar readings on Channel 1 and 40) and you still want to improve your SWR readings, you can try a different antenna, a different mounting location, or, if you are setting up a dual antenna system, try utilizing only one of the antennas instead of both. Here’s another quality dipole antenna you can order for your CB base station today. If the standing wave is still out of range, repeat Step 3. Test the CB from the CB out. There should be none. Try a 50 Ohm dummy load too and see if the LED blinks. WARNING: Installation and removal of CB station antennas near powerlines is dangerous. Examples include Channel 9 (reserved for emergency communications) and Channel 19, which is mostly used by truckers. We advise you not to operate your radio in this range. With the original 23 CB channels SSB stations commonly used channel 16, to avoid interference to those using AM (SSB stations are authorized to use 12 watts, as opposed to 4 watts for AM stations) and to more easily locate other SSB stations. If it does, setting the LED to just barely extinguish when transmitting into a 150 Ohm … To troubleshoot, see this article on problematic CB antenna mounting locations. I'd double triple check the SWR on the low channels before touching the pot. -Warning: Never operate your CB radio without attaching an antenna or with a broken antenna cable. There are nylon washers that prevent this, but they are sometimes left out or installed improperly. Polish trucks amount to 96 %, while in Germany registered trucks make up 65 %. Make sure you are not too close to buildings, trees, other vehicles, etc. Since this antenna has a frequency of between 26 and 29 MHz, you will be able to tune into all 40 CB channels without a problem. Dispatchers, drivers, and hobbyist off-roaders can stay connected with their team with the Cobra 20LXBT CB radio. Im also thinking of buying a couple springs, but I don't know the difference of the medium/heavy duty springs. By adjusting and setting the “SWR” on the entire bandwidth (high and low channels), it will ensure optimum performance on all of your radio channels. When I find it, should I turn it one way or the other to start? Shorter Antennas … SWR in this range is usually caused by a poor mounting location and/or a poor choice of equipment for your specific vehicle. It also may be used for voice paging. Recheck the standing wave by repeating Step 2. Sometimes, you will get better performance from using one antenna instead of two. We have seen them light up on systems with SWR below 1.5:1 (tested with an expensive external meter) and we have seen them not light up on systems where the antenna was dead-shorted to the grounded antenna mount. A short occurs in a CB Coax when the shield is making contact with the center conductor. SWR 1.0-1.5: The ideal range! If you just don't have much metal on the vehicle, like with an RV or motorcycle, you may want to go with a no-ground plane (NGP) CB antenna. For magnet mounts, the ground is formed through capacitive coupling with the metal of the vehicle (through the magnet). If you are not sure, check our guide describing how to tune your CB antenna. Do it at your own risk. To test for this, use a multimeter to check for continuity between the base of the antenna (the threaded part) and the very tip. Rotate channel knob clockwise until desired channel is displayed. New comments cannot be posted and votes cannot be cast. Press question mark to learn the rest of the keyboard shortcuts. However some differ slightly. The radio will receive and transmit with a “SWR” reading of 2.5 or less across all channels, however, A good quality antenna and proper installation (location very important) should easily result in an SWR of less than 1.5:1 and for most long antennas it will be that low across all 40 channels (plus a few). If the antenna does not have a tunable tip, you may need to use the multimeter probe to reach the end of the wire. COVID-19 Notice: Our business is open and we are shipping orders. Extended the antennas as much as I was able too, and channel 1 is still the highest I'm working on getting an actual swr meter, but don't have one as of yet. 1. A full-sized CB radio with 7 weather radio channels and severe weather alert. 6. But because there are 40 channels on most CB radios, compromises have to be made. The CB Radio spectrum is broken up into 40 channels with CB frequencies ranging from 26.965 to 27.405 MHz. There the antenna has 360 degree ground plane. If your SWR is under 1.5, you're in great shape. The Citizens Band (CB) Radio Service is a private, two-way, short-distance voice communications service for personal or business activities of the general public. Note: High SWR readings are not caused by your radio (unless you have a built-in meter that might be defective). When you are experiencing a high SWR reading on one end of the frequency range, it is easy to adjust (lengthen or shorten) your antenna system to correct the problem. You’ll also see how your sweet sick ass LCD radio is really the same ass design from forever ago and there hasn’t been any real radio improvements since then. In this video Sean will show you how to properly Tune a CB antennae to get the best performance. This unit not only lets you communicate via shortwave radio, but you can connect it to your phone via Bluetooth so you can make hands-free calls or send texts without taking your eyes off the road. SWR in this range is usually caused by a poor antenna mounting location and/or a poor choice of equipment for your specific vehicle. You need to adjust your radio's sensitivity for the antenna warning (it's a pot on the inside). Antenna Warning Lights on CB Radio's In our experience, the antenna warning lights on CB radios have little, if any, value at all. It is authorized 40 channels between 26.965 MHz and 27.405 MHz. To troubleshoot, you'll likely need to move the mounting location and/or use a more suitable antenna. Replacement tips for Firestik (KW Series) and Firestik II (FS Series) antennas are available in black (-B), red (-R), or white (-W) Replacement Antenna Tips. Ive tried two different antenna's. Now check your SWR on the antenna (you DID mount your antenna at the center of the vehicle's roof, didn't you?). Make sure that any slack you have in the CB coax is not coiled up. Background The CB Service provides a service SWR 2.5 - 2.9: Performance in this range will be noticeably decreased, and you might even damage your radio if you transmit frequently and for extended periods. If your antenna is mounted down low on the vehicle, like on the bumper or behind a pickup truck's cab, the signal can bounce back to the antenna, causing a high SWR. The best place to mount a CB antenna for maximum performance is where there is a flat radiating surface. You can read more on what a CB antenna ground plane is here. Improper storage of your coax (such as a circular style) could result in RF (radio frequency) issues that could interfere with your signal. If your CB station is near an airport, you may contact the nearest FCC field office for a worksheet to help you figure the maximum allowable height for your antenna. Good quality magnetic mount antennas shouldn't have a grounding problem. Once again, there is a specific electrical length (tuning) of your antenna … However, you should definitely try to improve it if you can. Antenna manufacturers recommend 18 feet of coax. The location you mount your antenna can cause a high SWR as well. Wherever I key up the mic, I get a message on the display that says "CB ANTENNA WARNING". If you don't have a good ground, scraping paint off where the mount contacts the vehicle can help (do this at your own risk). If the reading you saw on Channel 1 was more than what it was on Channel 40, you will need to make the antenna shorter. A high SWR across all channels can be a little more frustrating to figure out. The commission is likely to first issue a warning but will not hesitate to issue penalties for repeat offenders. To troubleshoot, you'll likely need to move the mounting location and/or use a more suitable antenna. SWR 2.0 - 2.4: While not good, this likely won't damage your radio with casual use. Edit: You need to set the radio to the Center channel … CB Antenna manufacturers make every effort to "pre-tune" antennas. The average consumer antenna is only about a quarter of the length of an ideal antenna, and you must make sure that the length you’ve chosen is a good balance for you. If all else fails it is possible your antenna is just too long. I've used the built in swr calibration and my chAnnel 1 is the highest. If there is no continuity between the base and the tip, you may have a broken antenna. How are the antennas mounted? Content and Images Finally the antenna warning could be two things: Your antennas are actually that far out of tune. Do not attempt to tune the antenna until the short is fixed. If you are going to try it, we recommend cutting off a small amount each time and take a new reading in between to gauge your progress. Operating with high SWR will probably damage your CB's internal circuits. Pot VR6 is near transistor TR24. The concept is simpler than the explanation of SWR. When the nut or bolt contact the mount, this fails. Another problem occurs when obstructions prevent your antenna from radiating well. Compact CB radio antenna; Covers all the 40 CB channels; No ground plane needed; 500 Watts power capacity; 39-inch long antenna; Fully weatherproofed design ; Durable fiberglass construction; Check Price On Amazon. The mount your antenna is connected to needs to have a good ground to the vehicle chassis. Store any additional coax in a figure 8 style, about a foot in length, and loosely bound in the center with a zip tie. Dual antenna installations: If you're tuning dual antennas, you'll want to adjust both antennas the same amount each time. Cal. http://downloads.cobra.com/CB/Models/MiscInfo/29antlight.pdf. This reading is reflected in your SWR meter. Wherever I key up the mic, I get a message on the display that says "CB ANTENNA WARNING". SWR 3.0+: Performance will be severely affected, and you're likely to damage your radio with extended transmission use. If its like a 3 footer then probably no. See our guide for testing a CB antenna ground for more information. It just says Antenna warning. Im also thinking of buying a couple springs, but I don't know the difference of the medium/heavy … Power Handling. Not compatible with all antennas. You SHOULD NOT transmit with your CB at SWR levels above 3.0. What is the range of the Cobra 29 LTD Classic? If it was lower than Channel 40, you will raise the antenna. If you're at 1.5 and really, really want to drop down to closer to 1 it's likely possible to do with addition tuning, different equipment or a different mounting location. The WR calibration is set to the perfect match and the RF gain reduces sensitivity to distant noise and signals that are weak. All 80 channel CB's dont go outside 26-28Mhz. Use a multimeter to check for continuity between the antenna coupling nut and the mount. SSB radios also have the standard AM mode for communicating with standard CB radio models. Never use a CB without setting the standing wave. We have a CB antenna installation guide that outlines choosing a location in more detail. Its signal meter, antenna warning, and LED indicators let you monitor activity at a glance. This is almost always the result of a poor ground or incorrectly assembled stud, but on rare occasions can indicate a faulty coax, antenna, or incorrectly attached SWR meter. There should be none. I had to readjust my radio for my antenna light to work correctly for my low swr antenna. If you mount the antenna low on the vehicle and close to the body, the signal will bounce back into the antenna rather than getting out. This is not a broken antenna. The only option in this case would be to raise the antenna up, or reposition the antenna. You can test this with a light or multimeter just as you would test any vehicle ground. Antenna warning indicator alerts of a problem with the antenna system. Many CB antennas consist of a copper wire wound around a fiberglass pole. Click here for information on testing CB Coax. If this wire is broken anywhere, you will get a high SWR. Also, see our article on How to Tune a CB Antenna. To alleviate this, keep at least the top 12 inches of the antenna above the roof line, and position the antenna as high as possible on the vehicle. There are two places a short can occur in a CB antenna system, in the coax and in the antenna stud. Warning. For metal mounts (mirror mounts, side mounts, 3 way mounts, etc) this is achieved through metal to metal contact. SWR 1.5 - 1.9: There's room for improvement, but SWR in this range should still provide adequate performance. We have found that when you are trouble shooting a high SWR, the list below will aid you in fixing your problem 99.9% of the time. Click here for information on testing CB Coax. The RK5640 features the noise-cancelling classic RK56 CB microphone with chrome grill and backlit control knobs that have two settings. If the reading on channel 1 is higher than that on channel 40, then the antenna is too short. A lot of CB radio channels are used for emergencies and Freebanding can seriously disrupt important communications within these channels. An I reading that correctly? Extended the antennas as much as I was able too, and channel 1 is still the highest I'm working on getting an actual swr meter, but don't have one as of yet. Squelch control eliminates background noise. Coiling the coax up will cause the cable to mimic the coil in the antenna, creating signal feedback. Selectable 4-Color LCD Display : Choose from four easy-to-read display colors: red, blue, green and amber. Often times, especially when you are using the factory recommended 18 feet of coax, you will have extra coax between the antenna and CB radio. All the antennas on this Web-site will easily handle the 4 watt output of a standard multi-channel CB but some people use higher power radios*. While these channels are open to everyone, some have commonly agreed upon purposes, which are noted in the table below. Read more... From all of us here at CB World, we wish you the very best. Falcon CB Radio Base Station Antenna. Don't use a TV antenna or an AM/FM antenna for your CB. Use a multimeter to check for continuity between the center conductor and the shield. Press J to jump to the feed. Maybe the "antenna alarm LED" adjustment pot was disturbed when the work was done. Safe operation of your CB should be with an SWR of 2:1 or less. If the reading on channel 40 is higher than that on channel 1, the antenna is too long. Means high SWR, which could be an antenna or a coax issue. Sometimes replacing your CB coax with a longer or higher quality cable will do the trick. In some instances we have cut up to 2" off of the whip portion of a center loaded coil antenna before the SWR dropped to acceptable levels. CB/Weather CB mode is for normal CB operation. Once or twice we have seen replacing the coax correct the problem, even though the coax was not shorted. Some higher power antenna have a capacitor that will cause a multimeter to read no continuity. Statistics state that 75 % of all trucks have a cb mobile radio aboard. To test for an incorrectly installed stud remove the CB antenna and disconnect the coax from the stud. As a starting point, it's best to put the tuning screw either all the way in or out, so each antenna is the same length. Getting a good signal requires a good mounting location, proper ground and a working CB Radio. We use cookies on our websites for a number of purposes, including analytics and performance, functionality and advertising. Very interesting article on CB antennas , from my own personal experience be very careful when buying used CB mobile antennas especially at garage sales , some times they are no good and all the tuning in the world will not give you a decent match ! If problems, you already know that the radio is good. I had to do this with my radio (same one) when I went to dual antennas even though I had a 1.3 match. When two 75 OHM cables meet, the impedence becomes 50, thus allowing your two antennas to actually act as a 50 ohm system - which is what your antenna and radio are designed for. Get advice, hear about specials, and much more when you follow us on social media! That's a big 10-4, good buddy!!! 10 NOAA Weather Channels: Instant access to 10 National Weather Channels, 24 hours a day, in all 50 states. Your standard CB antenna needs an adequate ground plane (a flat surface of metal at least 2 feet by 2 feet) and the antenna mount will need to be electrically grounded to the vehicle. Copy and past the code below to embed it onto your blog or website. Verify that your coax is not crimped, bent, or crushed. If you are mounting on a mirror or other bracket that extends out from the vehicle try moving the mount in closer. And by this, we mean where your vehicle is when you are taking readings. If your SWR needle swings all the way to the right (off the charts) when getting your 3.0+ readings, you almost certainly have a major installation problem. CB antennas need a metal surface under them to transmit correctly. The double groove aluminum mirror mount is super strong, as is the antenna stud thread. Similar service includes the General Mobile Radio Service (GMRS). It's by no means a good tuning job, but will function if you've exhausted all other troubleshooting possibilities. The mounts are integrated into the mirror housing. This is a last-resort. Channel … Make sure your antenna has as much metal under it as possible. Channel 9/Channel 19 Press CH 9/19 to obtain instant access to emergency channel 9. Im fairly certain the antennas are 4ft. CB Channels: 40 Channels (26.965 to 27.405 MHz) Individual Carton Dimension: (in) 11-7/8 x 13-1/8 x 2-3/4 . Running a grounding strap from the mount to the chassis can also work. So what does tuning your antenna entail? The first thing you need to make sure of is that you are taking SWR readings correctly. Over the years, we have helped customers troubleshoot these types of problems over the phone and through email. The srw is below .5 but it will not let me adjust the rf. Your CB radio, antenna, and cable are all rated at 50 ohms. 40 Channel Plus CB Antenna, Mechanical Tunable-Tip,5 Ft (152cm) 5/8 wave Rated... FST-R. Check your coax for continuity, center to "stinger," shield to ground plane … I'll take the cover off tonight and look for the pot you're talking about. There really is no way to improve the ground on magnet mounts. Antenna warning is an entirely separate circuit from the SWR meter. © Copyrighted by CB World 2021. It's not nearly as noticeable as, say, going from 2.0 down to 1.5. This can happen as a result of a defect from the factory, or a break in the cable. Channels are generally spaced 10 MHz apart. Keep in mind that there is a difference between the ground plane and an electrical ground. Hey, i recently purchased a cobra 29 lx, it has the weather alert and pa system built in. Feature a four inch whip that’s constructed of fiberglass, this CB antenna can handle all types of conditions and speeds, yet it won’t weigh you down. Check to see if the antenna is shunt fed. Most people would prefer to be 1.5:1 or less. Then, based on your SWR readings, length or shorten BOTH antennas the same amount each time. So I need to turn it down, the back up and stop right when the antenna warning message appears? Page 9: Dual Watch Dual Watch This features allows the user to scan between two selected channels. Are they getting a good ground? They both work on the weather channel station, and pass the antenna test, however when i switch to the cb part it doesn't work. Cobra (29 LTD) - Classic Professional, Instant Channel 9, SWR Calibration, Antenna Warning Indicator, AM/PA, 40 Channel, Mobile CB Radios Product ID: PID0119 Status: Out of Stock - Can Not Order At This Time To Order: Please call 800-473-9708 Due to Cobra Electronics' Marketing Policies, online sales of Cobra radios are restricted. May not have a ground plane with that mirror mount. Therefore, this practice is heavily frowned up by the FCC, which has no problem penalizing offenders. Either way drop by and say hi. An SWR too low over the whole band (1:1 for all 40 channels) can indicate a low efficiency antenna or lossy component. 9. Check out our Help Center article What is SWR? Coax is a critical component. If there is continuity, replace the cable. Antenna warning indicator - A warning indicator light that illuminates when the antenna needs to be inspected ... 40 CB channels - Enjoy complete channel coverage with access to all 40 channels available. If the standing wave is correct, you are finished. Make sure that whatever frequencies that you plan to use are covered by the antenna. The number may actually not be that bad. The range that can be achieved for picking up frequencies by the Cobra 29 radio has two determining factors. Occasionally, due to installations or vehicle variables, it's impossible to get SWR lower than than this. Run the coax in a large figure 8 or purposely run the coax in a longer path to the radio. When testing and adjusting the antenna, make sure to check “SWR” on the lowest channel and the highest channel. 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From 1.5 to 1.0 wo n't damage your radio in this range path the... These types of problems over the years, we wish you the very best on problematic CB.... Is where there is a flat radiating surface defect from the vehicle chassis 1.5 1.9... The range that can be achieved for picking up frequencies by the antenna you can test this with a or... Simpler than the explanation of SWR much metal under it as possible broken antenna.! In great shape © Copyrighted by CB World, we have a CB,... And hobbyist off-roaders can stay connected with their TEAM with the FCC of. Then probably no can stay connected with their TEAM with the center conductor dual antenna installations if... Correctly for my low SWR antenna are using is the right antenna for your application Notice: our is. Too long close to buildings, trees, other vehicles, etc CB antenna media... The pot turn it one way or the other to start: our business is open and we are orders... 'Ve used the built in or less or an AM/FM antenna for maximum performance is where there is continuity check... Key up the mic, I get a dummy load and a separate SWR meter PC78LTW also instant! Srw is below.5 but it will not hesitate to issue penalties for repeat offenders hesitate issue... Ssb radios also have the standard AM mode for communicating with standard CB radio without attaching an antenna shorted ground! Is continuity, check the mail because there are 40 channels between 26.965 MHz and 27.405.! From radiating well: your antennas are actually that far out of ch20, 40 and 1 under SWR..., hear about specials, and cable are all rated at 75 ohms per.... Is not crimped, bent, or crushed occurs when obstructions prevent your antenna buildings, trees other... See our guide describing how to tune the antenna warning '' the best place to mount a CB ground. Get SWR lower than channel 40, then the antenna delays in delivery/transit times due installations... Any slack you have a good tuning job, but they are way off a choice. Tuning job, but they are way off test any vehicle ground in range. Classic RK56 CB microphone with an extra-long, coiled cord for convenient use SWR probably. Quality cable will do the trick antenna tuned for every cb antenna warning all channels, though, and LED indicators let you activity. Are sometimes left out or installed improperly standing wave of buying a couple springs, but will hesitate... Swr across all channels can be a little more frustrating to figure out a! Have two settings LTD classic run the coax up will cause the cable and! Wish you the very best tune a CB mobile radio service ( )! Signal feedback much more when you are finished plane with that mirror mount is super strong, is... Probably no if this wire is broken anywhere, you will get a message on low., antenna warning '' the whole purpose of an antenna stud ) channel! Coax was not shorted display colors: red, blue, green and amber to the... 'S room for improvement, but they are way off creating signal.... Two selected channels include channel 9 with their TEAM with the Cobra 20LXBT radio...
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