Cb Swr Too High


antennas made for CB are intended to be installed by the consumer. MFJs lighted peak and average reading Cross-Needle SWR/Wattmeter makes tuning quick and easy. by drew434 » 6. 965 MHz) or. Verified purchase: No. We broke our list of common high SWR causes into six primary categories. matching box, HOW TO REDUCE THE POWER REFLECTED IN A HIGH AMP POWER, rf reflected power high. Engineered with the most advanced available technologies it is completely manufactured in Italy with high quality materials. 2:1 denotes an AC voltage due to standing waves along the transmission line reaching a peak value 1. In either case there will be problems in matching the 50 or 70Ω feeder to the dipole and if the reactances are great, there will be a high SWR on the feeder and considerable. You do this by making the antenna either longer or shorter. Either the power output is too high, the frequency range is too wide, or some modes aren’t allowed. Also worth noting: A high SWR and ground plane issue does not prevent you from using your cb to listen to incoming transmissions. Some include fuses that will blow if the surge is too great, protecting the rest of the equipment. Now in order to get the true SWR of the system, you have to throw away that 3-foot jumper cable for now. Therefore, because the antenna is not tuned for this garbage the amplifier is creating, it's reflected, and your SWR meter "sees" this, and tells you you have a high amount of reflected power, or in other words, a high SWR. In Stock, Check our online catalog for availability! The FCC approved Galaxy DX-2547 CB Base station features 40ch AM/SSB with variable output, Variable TalkBack, 6 digit freq counter, Rgr Beep, Automatic SWR meter & More!. Large Galaxy Meter with StarLite Faceplate and 4 Scales Automatic SWR Circuit (No Complicated Calibration Procedure) Talkback Circuit with On/Off Switch and Volume Control Roger Beep with On/Off Switch and LED Indicator Galaxy Noise Filter for Use On Weak Signals High SWR Alert LED Indicator and 5 Digit Frequency Display +/- 1. Huge selection of trucker's accessories and supplies such as CB and 10 Meter radios, antennas, coax, GPS, Bluetooth headsets, log books, and a lot more. SWR stands for "standing wave ratio". The waves being poorly dispersed, their poorly dissipated power can damage the output transistor of the CB station and even destroy it and cause a costly failure. For each 100 feet of coaxial cable, you lose half your power at an SWR of 10:1. The industry standard screw on CB connector is much bigger than the one on the HD CB. and that the ground is connected to the ground of the coax. (antenna too short?) still not usable. Find helpful customer reviews and review ratings for FireStik FG2648-B Two Foot No-Ground Plane CB Antenna kit (Black) at Amazon. You should get a model made of high-quality materials so your cb radio base station antennas will last for a long time. If experiencing SWR problems, check each of the following conditions in the order shown until problem has been uncovered. High SWR Troubleshooting Guide In this guide, we walk you through the process of troubleshooting SWR issues. I have the fangars mount and it is sturdy and works well. I’m talking about the high-cut filter switch that is now available in this limited-edition series of CB radios. I used to be on cb about 17 or so years ago and have thought about setting up again. While t is possible to use a longwire antenna for CB. Under-coupling is the very worse thing to do to any amplifier because failures can occur in a matter of seconds!. The difference in SWR at the reference point is 1. 1 out of 5 stars 342. 5% of high SWR readings will always come back to something in the intallation. With your SWR meter set to "power" measure and record each of the three channels power value: Low end: Band 1 Mid point Band 19 High end: Band 40 Each one should be about the same. A digital or analog reading on the front of the SWR meter will indicate if the voltage standing wave ratio is too high, by showing the level entering an established red zone. Using the example above, you need a 14. CB Radio Accessories. ) I'd also add that even a resonant antenna can still have an SWR because the impedance doesn't match the transmitter. 1) and SWR of last channel (23 or 40) 3. I have a a 6 foot Firestik in the attic. If experiencing SWR problems, check each of the following conditions in the order shown until problem has been uncovered. At SWR values greater than 2:1, most modern transmitters will begin to automatically reduce transmit power to avoid high power reflections returning into the transmitter circuits. You are at : Cb Radio Antennas Scanners Cellular Radar Detector > 10 Meter Radios > Stryker Radios - Stryker 10 Meter Radios Stryker Radios - Excellent service, lowest prices, repair, warranty, tuning and fast world wide shipping on the latest Stryker radios. Although both are directly dependent on each other. On the off chance that you transmit with your communication and perhaps have high SWR readings, this can result in harm to your communication!. matching box, HOW TO REDUCE THE POWER REFLECTED IN A HIGH AMP POWER, rf reflected power high. If you're using this for an actual CB, I wouldn't be as concerned about ground plane, as I would be the SWR. Ch 1 and 40. It just made my SWR higher. This site is for CB and HAM radio mods, repairs,add on boards, alignments, projects and reference info such as circuit diagrams, component data sheets, PLL pinouts, transistor charts, and projects to build such as bleeps, mike amps, and frequency expansion add-on boards, repair tips to fix a CB, and download of CB Radio Simulator Software. 5 on channel 1, and 3 on channel 40. Tuneable for lowest SWR reading. Shorted Stud Mount Disconnect coaxial cable at antenna mount. They provide truckers, small businesses, and radio enthusiasts with with a system for company, information, and interaction on the road, at home, or at work. If the SWR for channel 40 is too high, lower the whip. Greetings, I have a standard run of the mill 80 channel UHF CB fitted to my vehicle with a 6. One thing I have not tried is hooking up my antenna and external wattmeter. ive changed all the ends on the coax (new rg-8 super low loss) and checked with an ohm. For 10M-12M Amateur Use too. 5:1 or less? Most CB radios today have protection circuits that starts to shut down (by lowering the output power) when the SWR reaches above 2. CB specialists do that job with a standing wave meter to check and adjust the aerial. You cannot receive a refund if you have placed a ShippingPass-eligible order. The SWR was not higher than 1. Swr too high new coax cobra 29 radio, truck spec oil filled ant Make sure the antenna is installed correctly. If the system has been installed correctly with quality components, then you can get perfect SWR reading. If the SWR is constant across 40 channels, I would be wondering why. It won't damage your equipment and the most likely reason you can't get it lower is the antenna location on your bumper. Both my radio and my meter are calibrated. Those 'no-tune- circuits are never going to be exactly 'right' in all circumstances, they can't be by their very nature. 5% of high SWR readings will always come back to something in the intallation. What if my SWR is too high? Your SWR is over 2 on channel 40… This means that your antenna is too long. Why a CB radio? I've been looking for an excuse to buy one since listening to the song Convoy as a boy, but do I really need one? To communicate on the trail, most 4-wheelers use a CB (Citizen's Band) radio. This setting should provide an even SWR rise to the highest and lowest frequency of 11 meters. SWR was too high until I used a longer ground wire. Questions about an end-fed dipole for 10,20 and 40 meters and Yaesu FT-817. Your transceiver features. As a radio, it is an impressive one. Cobra has been around a long time and still make a quality product. After the install we ran the antenna cable through a SWR meter and into the CB. Assessing power output using a CB meter will be difficult. The ideal situation would be that the antenna was centered over your home and at least a full wavelength (about 36') above it, but that's probably not possible. This is a no ground plain antenna with - Cobra 148 GTL 120-Channels Base CB question Search Fixya Press enter to search. Discover (and save) your own Pins on Pinterest. Remember easy & cheap 1st, hardest and expensive last. If your antenna is too long, it is necessary to reduce its physical length. A cb radio setup needs these things: A decent cb radio, good coax, tuned antenna (changing coax length will affect swr's also), good ground on antenna mount. Local single sidebanders heard what happened. Therefore, because the antenna is not tuned for this garbage the amplifier is creating, it's reflected, and your SWR meter "sees" this, and tells you you have a high amount of reflected power, or in other words, a high SWR. I used to be on cb about 17 or so years ago and have thought about setting up again. 5 is still a bit high. SWR means the standing wave ratio. I hope this video helps new breakers in tuning their Mobile Antenna. Check SWR on channels 1 and 40. A common metric of antenna performance is SWR bandwidth, and this is often defined as the bandwidth for which the SWR is at a value of 2:1 or less. You definitley need one and they need to be below a 2 I like them to be more around one with 1. I also looked at the Australian analyzer but it is out of my budget and the website was a bit confusing to me. Select CH-I on your CB-transceiver and take an SWR measurement, writing down the results. ive tested the meter (dosy 4001) on another station,its working right. What is SWR? SWR is sometimes called VSWR, for voltage standing wave ratio, by the technical folks. How to Ground a CB Antenna Perhaps you're doing an original installation and want to know how to ground a CB antenna. With that in mind, the SWR meter is placed in-line between the radio and the coaxial cable that feeds the antenna. My Cobra Mobile CB Radio With Dynamike Gain Control And SWR Antenna Calibration And NightWatch" Illuminated Display With Dimmer Control Is the best out there it looks good and works great. Use a cheap "CB" SWR meter, they can. Micronta 3 range power, modulation, swr tester How to use a SWR Meter for tuning CB Antennas - Part. 2, which is very good. You could potentially damage your radio. The antenna light comes on on channel 20 sometimes and always when I talk into the mic. While there are far too many things to cover here regarding SWR, I will offer some ideas on the subject. On channel 1 its about 2. ) I'd also add that even a resonant antenna can still have an SWR because the impedance doesn't match the transmitter. MFJ-1890 10 Meter Moxon Antenna (Tested on 10 meters & 11 meters/CB Band) MFJ MOXON Quick Look From CBRADIOMAGAZINE. You should couple the antenna via some sort of antenna tuner and tune as close to 1:00 SWR. 3:1, after 1. The following list shows the most probable causes of high SWR in order from the most common causes to the least common causes. If you tune the antenna badly, it can turn your CB radio into a useless brick. com - The only online CB Magazine in the world Also to clear up the SWR (standing wave ratio): SWR needs to be tuned so that you do not damage your radio. See how antenna height determines the radiation pattern. Mounted CB Radio on wooden square, size of bottom of compartment, and covered base with rubber. Modulation - what is it and how much is too much? You'll often hear on the CB radio one operator asking another "how is my modulation?". 2 times that of the. The roof rack is not grounded, so you need to run a separate cable from the mount to a bolt in the chassis. Now in order to get the true SWR of the system, you have to throw away that 3-foot jumper cable for now. Australian CB Radio has two bands 477MHz UHF and 27MHz HF which one should I use? Currently the 477MHz UHF band is the most popular CB Band, the reason for this is undoubtably the ability to use antennas that are either short that have a low gain, or long that have a high gain, (the higher the gain the better the distance) this is in contrast to the 27MHz band that requires antennas to be very. 0 KHz Receive. At frequencies higher than 14 MHz, it's worse. If it's not too much trouble, then tune your CB reception apparatus among establishment and before transmitting with your radio. As long as the SWR is not too high - i. Please note, that CB amplifiers also require a heavy duty power supply source to run them. SWR means the standing wave ratio. I can calibrate the SWR with that set-up but when I check the SWR on the individual channels, the lowest I get is a 3 and most of them are pegging. I decided to SWR in my radio, but unfortunately after hours of SWRing in, I later tested the patch lead to find a fault. and that the ground is connected to the ground of the coax. This is not a good SWR test. Quarter Wave Antenna. This page will show you what you need to do, and show you what equipment you will need. antennas made for CB are intended to be installed by the consumer. At home I use RG213U. WHAT RANGE WILL A CB RADIO GIVE ME?. If I knew what size they were I'd try and find some stainless. Have fun on the radio. It is absolutely necessary that you get the swr tuned. The swr on my a99 Im tying to install is way too high. I'd also note that 19 feet up for a 40 meter antenna is not very high. CB (or Citizens Band) radio is a type of radio that transmits signals on a channel shared by other CB radios. So much so that if you move your antenna from one location to another location on the same vehicle … there is a very high likelihood that the SWR is going to change. swr too high on spt. I'm not familur with your CB or Antenna. A poor ground connection here is a major cause of high SWR. I also bought an swr meter so that I could properly tune the antenna for best performance. 15 Feb 2015 How does a astatic pdc1 meter work - Radio Communications. So according to what i had read, i needed to physically shorten the antenna to get the SWR on channel 40 to come down. Otherwise your SWR will be too high and possibly kill your radio. Here's an informative PDF document from the ARRL for further reading. Mounting in the front stakhole was easier but the SWRs were way too high that close to the cab. Antenna is a Thunderpole Orbiter (1. We all know what an SWR reading is right? Power reflected back down the feedline, or coax that the antenna is not radiating. SWR means the standing wave ratio. Basic troubleshooting procedures require a process of elimination in order to get to the culprit. 0:1 will produce an excellent broadcast signal that will not harm your CB radio and broadcast clearly across. It can cause audio feedback if the volume knob is up too high. INTRODUCTION. The antenna will not accept energy transmitted at higher MHz, and returns it all back to the radio, which shows up on the meter as high SWR because the meter cant tell the difference. High SWR readings on the meter that is built into the radio and the antenna light on the radio comes on when the mic is keyed. Posts about AM/FM CB written by Reverend Bow. Sorry about my bad English speaking. Don't key up too long in case there really a large mismatch which might blow the final output amp stage. You'll never. Firestik has tested literally hundreds of SWR meters. I tried a matchbox/spliter for an am-fm-cb combination antenna with my regular car antenna (~3 foot telescopic). 0 SWR be too high for this install and if so what can I do to help this? March 25th, 2013, 5:18 pm The radio deadkeys about 10-to12 and swings to about 50 watts give or take with power turned up. Bingfu VHF UHF Car Truck Police Scanner Adhesive. Although internal SWR meters in radios are known for not being as accurate and we always prefer to set up an antenna using a good quality external meter. A high SWR across all channels can be a little more frustrating to figure out. In order to write the list of the best galaxy cb radio we analyzed exactly 29382 reviews. That's a small sacrifice when you consider that the side null of the other antenna is well over 10 db. A digital or analog reading on the front of the SWR meter will indicate if the voltage standing wave ratio is too high, by showing the level entering an established red zone. A directional wattmeter designed for CB is going to give you some sort of indication, but it won't be particularly accurate. If the SWR is too high, then you will want to tune the antenna. Power transistors, microphones, lights, fuses and the disrespect of the installation and use of specifications (including but not limited to antenna used with too high power, final output power transistors (SWR), inversion of polarities, bad connections, over voltage…). And, an swr of something around 1. The calibration is not going to be particularly accurate. SWR (Standing Wave Ratio)is a measure of how well your antenna is "matched" or "tuned" to operate at CB channel frequencies, & to your vehicle. Soup and down, up and down, up and down you start chopping off or adding pieces of wire until the antenna comes up to your design frequency with the lowest swr. Galaxy CB radios are designed with Features that a serious CB operator can appreciate and a new user can easily master. The adjustments you make based on this information will depend on the type of antenna you are adjusting: Whips, Mobiles and Groundplanes. If they are "firestick" style, you CAN carefully remove the cover from the tips. 6 meter beam antenna. According to my research, if your SWR reading on Channel 40 is higher than the reading on Channel 1, your antenna is too long. It's not uncommon for an antenna to ~not~ be a 50 ohm load. There are many things other than the antenna that can cause high SWR. Make sure the switch is in the CB position. You need two items to read the SWR: 1) An SWR meter 2) A Patch lead - (a short length of Co-Ax with a PL-259 Plug on each end) Your SWR meter has two sockets usually marked "ANT" and "RTX" or similar - connect your patch lead to the socket marked RTX, and the other end of the lead to the CB`s aerial socket. Channel 1 SWR is greater than Channel 40 SWR. Galaxy CB radios are designed with Features that a serious CB operator can appreciate and a new user can easily master. Get the best deal for Sirio Radio Antennas from the largest online selection at eBay. It shouldnt have anything to do with noise, but your liable to burn up the finals in the cb if your swr's are too high and your cb will get out further. Keep measuring and adjusting until the lowest SWR is in the part of the band where you intend to operate the most. I also tried grounding the PL connecter to the engine block. You will need an SWR meter to do this. You need to make sure that there isn’t too much power being reflected back into the radio through the feedline from the antenna, which prevents the proper signal output. An export radio is basically a CB transceiver that can’t be sold legally in most countries. Have a 2007 Harley ultra classic that has swr readings of over 3 on all channels on the cb. Tyipically, anything higher than three will eventually destroy the radios internals, and the best signal will come in if SWR is below two. We all know what an SWR reading is right? Power reflected back down the feedline, or coax that the antenna is not radiating. I connected the SWR meter to the unit and, following the instructions, tested my CB to get an SWR reading. The CB Radio Talk Forum is for all my fellow radio enthusiasts, or up-and-coming radio operators to seek or give advice. The roof rack is not grounded, so you need to run a separate cable from the mount to a bolt in the chassis. For CB antenna tuning, get the lowest SWR reading possible. So it's likely just a mechanical mounting issue that is causing your high SWR, at least that is the usual cause. Built-in SWR meter. If the reading on Channel 1 is greater than the reading on Channel 40, your antenna is too short and you'll need to lengthen it. I'm talking about just the average trucker with a CB radio and standard antenna. I shortened the coax cable on my car's 477MHz CB antenna because the braid was frayed at the transciever connector end, and a metre or so of spare coax was coiled up behind the dash. In this case, the Customer Care team will remove your account from auto-renewal to ensure you are not charged for an additional year and you can continue to use the subscription until the end of your subscription term. The box for the CB is just sitting under the center console not bolted down. Press and hold the PTT button and rotate the control knob until the bar meter aligns with CAL. Keep measuring and adjusting until the lowest SWR is in the part of the band where you intend to operate the most. If the SWR is constant across 40 channels, I would be wondering why. This Pin was discovered by Christo Bock. If your CB radio is not connected directly to the battery, make sure the fuse panel or extension wire it is connected to has a good connection to the battery. Door Jamb CB Antenna Mount Terminal | Right Channel Radios Ran the antenna lead, up through existing grommet in tyre well, and along under carpet into center console, power also to back of key activated cig lighter. Unlike TV, AM/FM or Scanner antennas that do not Transmit, the CB & other "transmit" antennas need to be tuned to operate or Transmit correctly & most effieciently. Setting SWR - Harley Davidson Community I just happen to have a meter for sale too What a coincidence. You will need an SWR meter to do this. I have always been a huge fan of the stainless whip, and will probably always be. The SWR is usually thought of in terms of the maximum and minimum AC voltages along the transmission line, thus called the voltage standing wave ratio or VSWR (sometimes pronounced "vizwar"). An SWR too low over the whole band (1:1 for all 40 channels) can indicate a low efficiency antenna or lossy component. Safe operation of your CB should be with an SWR of 2:1 or less. A cb radio setup needs these things: A decent cb radio, good coax, tuned antenna (changing coax length will affect swr's also), good ground on antenna mount. It'll get out about as good as a ¼ wave ground plane CB radio antenna if you get it up high and in the clear. What can I do to get that down? I plan on ordering a SWR meter here soon. Still, the unit costs and delivery costs push it too high, even if I wanted one. You could potentially damage your radio. However, I have done a lot of research. We broke our list of common high SWR causes into six primary categories. Micronta 3 range power, modulation, swr tester How to use a SWR Meter for tuning CB Antennas - Part. or capacitive reactance at its feedpoint. Ch 1 and 40. Tune the aerial to the best standing wave ratio (SWR) on an intermediate channel e. Took it up to the roof, and just strapped it to the chimney, swr went up to 2. The rooftop antenna you mentioned will definitely work better as long as it is tuned properly. Built with ruggedness, durability and reliability in mind, this model will answer your needs for a high performance radio with both AM and SSB operation. The SWR is usually thought of in terms of the maximum and minimum AC voltages along the transmission line, thus called the voltage standing wave ratio or VSWR (sometimes pronounced "vizwar"). 1 out of 5 stars 342. 6 meter beam antenna. 6 or greater. Why a CB radio? I've been looking for an excuse to buy one since listening to the song Convoy as a boy, but do I really need one? To communicate on the trail, most 4-wheelers use a CB (Citizen's Band) radio. CB (or Citizens Band) radio is a type of radio that transmits signals on a channel shared by other CB radios. Last flaw: 5 KHz steps are too coarse for amateur use. At one glance you can read SWR, forward and reflected power in two power ranges. IF SWR is HIGHER on 40 than it is on CH1, then it is too LONG. 75 on Channel 1. AND it works BAD—too LOUD & BAD modulation! It makes your power output LESS and makes you too LOUD & NOT CLEAR ! “MOSFETTING” is a SCAM & a RIP OFF! WHY sound like GARBAGE & be too LOUD too! DO NOT BUY a so called “amplifier” which is really just a MODULATOR (RF-75 & 150) to be put on the back of your CB. We broke our list of common high SWR causes into six primary categories. Have fun on the radio. The Linear Effect. There is no way to Tune an antenna without a meter. The CB Radio Talk Forum. Also features Unique "beep Sound" SWR Meter feature, Vox, Automatic Squelch, Dual Watch and More!! Operates from 12 to 24Vdc. Check SWR/CB Antenna Connections. This has the advantage over it's valve equivalent of giving instant output (no warming up) and requiring no tuning. Antenna tuner, matching network, matchbox, transmatch, antenna tuning unit (ATU), antenna coupler, and feedline coupler are all equivalent names for a device connected between a radio transmitter and its antenna, to improve power transfer between them by matching the specified load impedance of the radio to the combined input impedance of the feedline and the antenna. If your radio has side band operation, make sure you are in AM mode before doing SWR tests. Anything below 1. To answer the original question very simply, no, SWR can't be too low. A good 50ohm coax is necessary too. didnt seem too bad. I used to have a lot of fun on the CB with my friends from High School. About the 10-meterband HF amplifiers RE-PA5HF10. Some include fuses that will blow if the surge is too great, protecting the rest of the equipment. The magnetic mount antenna ground by inductance from the magnet. SWR too high. Having the antenna too close to the body of the Jeep, or being mounted on the tailgate is what is probably causing the high SWR. On to the 2 meter antennas. A bonus is the 10 channel weather stations. 0 on channel 1 and above 2. I bought 4 mobile stick antennas for $20 and used two of them plus a structural T tie bracket (reformed with a hammer while in my vise), mobile mount stud for the hot leg, 3/8-24 bolt through male to male adapter from a spring mount for the ground leg. 0:1 will produce an excellent broadcast signal that will not harm your CB radio and broadcast clearly across. CB radio antenna problem-SWR too high I have installed the OEM CB radio and antenna. It doesn't need to have been clipped or modded, it just has to have the mic gain set up too high and that'll produce a wide splattering signal. Unlike TV, AM/FM or Scanner antennas that do not Transmit, the CB & other "transmit" antennas need to be tuned to operate or Transmit correctly & most effieciently. Linear Amps and SWR It's too easy to blame the part added in, when the radio is merely > If the input impedance is high will it make the swr high on the output?. An SWR meter is an important yet simple and easy to use bit of kit. just route it straight from CB to antenna and test SWR again. Power transistors, microphones, lights, fuses and the disrespect of the installation and use of specifications (including but not limited to antenna used with too high power, final output power transistors (SWR), inversion of polarities, bad connections, over voltage…). If the SWR for channel 40 is too low, raise whip 4. Use them mostly to indicate serious high SWR problems only. my swr is too high, was 1:1 WHEN I INSTALLED 2 WEEKS AGO i am using a silver rod base aerial, with a yaesu ft920 - Superstar SS-3900EGHPA CB Radio question. Setting the antenna SWR with an amplifier can get involved. 5, but as soon as i route the wire along the correct route (from the centre console, behind the glove box, along the bottom of the 2 doors then up to the roof out of the boot hatch) the SWR rises to above 3 again. It's critical that the antenna not touch the mount on a metal-to-metal basis. Use a cheap "CB" SWR meter, they can. With the Larsen NMO27 cut by the book the SWR did drop a little. On the off chance that you transmit with your communication and perhaps have high SWR readings, this can result in harm to your communication!. For just the CB in the mobile RG58 will do just fine. Sweet thing - Female CB operator. *Automatic AWI (Antenna Warning Indicator) alerts the operator if their SWR's are too high *Multiple step dimmer button on front panel *Front microphone connector for easy mounting in tight spaces *Receive and Microphone gain controls *Frequency Counter Jack pre-wired for FC-390 style counters *1 Year Limited Factory Warranty. Hi, One of our yachts has a problem with her VHF radio (ICOM IC-M503). Back to the late seventies and early eighties this Sommerkamp was a dream for many cb operators. If you tune the antenna badly, it can turn your CB radio into a useless brick. Tuning the CB antenna means adjusting the antenna to the correct height for the radio to send out and receive signals efficiently. It can be useful to check the sound of power & Echo type mikes. If the SWR on channel 1 is higher than that on channel 40, your antenna is too short. cobra 25 ltd classic this is a true classic cb has rf gain,mic gain,nb,and anl but don't let the size of this radio fool you they talk like a big rig be sure too look at some of the up-grades for this radio this radio is small and compact great spare radio cobra 25 ltd classic $100. Antenna is a Thunderpole Orbiter (1. It only knows how much power is going forward and how much is reflected. This has the advantage over it's valve equivalent of giving instant output (no warming up) and requiring no tuning. 1274 Answers. Checked continuity of the cable from the cb unit to the antenna stud. We have found that when you are trouble shooting a high SWR, the list below will aid you in fixing your problem 99. 3 barefoot and barely reads amplified, same with the amp bypassed. I used to have a lot of fun on the CB with my friends from High School. - cb radios - cb radios, tuned and aligned set up ready to go. Check our rating lists and read reviews from other buyers to find a good option. didnt seem too bad. 0 is the Anytone Smart CB and a QYT KT-8900 VHF/UHF, External speaker, USB Power Ports x2, Volt Meter, Anderson Power Pole power inputs, and a 40mm, 5 CFM Fan to move some air in the box. Good for you! But wait, there's something else to do that can make or break the success you'll have making those contacts with your radio: you'll need to tune the antenna, also known as setting swr on a cb radio. If the dipole is too short to be resonant the reactance is capacitive and when it is too long the reactance becomes inductive. understanding & repairing cb radios. Used a Firestik offset stake hole mount on the rear stake hole. AND it works BAD—too LOUD & BAD modulation! It makes your power output LESS and makes you too LOUD & NOT CLEAR ! “MOSFETTING” is a SCAM & a RIP OFF! WHY sound like GARBAGE & be too LOUD too! DO NOT BUY a so called “amplifier” which is really just a MODULATOR (RF-75 & 150) to be put on the back of your CB. The difference in SWR at the reference point is 1. High precision, convenient for use, good for HAM people. If you're using this for an actual CB, I wouldn't be as concerned about ground plane, as I would be the SWR. Most antennas are too long out of the box. The allure of and addiction to high power and how it changes us As far back as I can remember, once I finally got involved with CB operators who owned radio equipment beyond that of simple kid's walkie-talkies, I've been aware of a device known as a "Linear Amplifier" or simply "Linear" for short. Starting with the most common occurring SWR problems, we show you how to test for everything from improperly grounded antennas to defective equipment. Do not second-guess this process. We suggest checking the SWR on the top, middle and bottom channels on the band you will be using, i. With this you'll need an SWR meter to measure SWR (Standing Wave Ratio) and adjust the antenna height to tune for the best SWR reading that you can. In fact, after your first swr check, the antenna may be lowest in swr way low in frequency or just the opposite, too high. You cannot receive a refund if you have placed a ShippingPass-eligible order. Press S/RF/CAL/SWR to SWR. With your SWR meter set to "power" measure and record each of the three channels power value: Low end: Band 1 Mid point Band 19 High end: Band 40 Each one should be about the same. ) Transmitter or transceiver SWR too high through amplifier, should be under 1. SWR reads at about 2 on channel 20 and about 3 on channels 1 and 40. You will need an SWR meter to do this. Buy RCI 2970N4 DX AM-FM-SSB-CW 10 & 12 Meter Mobile Ranger Radio : Fixed-mount CB Radios - Amazon. VSWR is a measure of the reflected power on a transmission line. With the radio pulled out from it's mounting, attach one end of the patch lead to the socket on the back of the CB (that the aerial lead normally plugs into) and the other to the 'trans' (i. 219 foot jumper from the radio to the SWR meter, and a 1/2-wave multiple length from the SWR meter to the antenna. Make sure ALL parts of the Antenna is away from other Antennas, metal of any kind, other wires including but not limited to cable TV, phone, and electrical wiring. My personal favorites are the Astatic 636L and RD104E. 8 that you have is not high enough to do harm to the output of your CB. I can calibrate the SWR with that set-up but when I check the SWR on the individual channels, the lowest I get is a 3 and most of them are pegging. CB (or Citizens Band) radio is a type of radio that transmits signals on a channel shared by other CB radios. Getting the SWR right is crucial not just for getting decent range but also because a high SWR reading can damage your CB.