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Cb Swr Too High

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I then ran the wire down to my frame, where I've made it bare for the ground to go. After a while my SWR increased (I began to frequently remove the whole antenna and never put it back in the same place). Grainger is best known as a business supplier - you know, the people with the ubiquitous catalog. I think it can be solved by adding an attenuator between the 2 MAR's. I bought a 59" center coil whip because the fiberglass antenna wasen't working well. Defiantly upgrade to a better antenna and with the static you said you were getting I'm betting your SWR is high, don't use the CB till you get your SWR checked/a better antenna other wise you'll blow the final and only be able to listen but not transmit. NO, don't put it there it won't last on the plastic. 5:1 is probably okay. There is some small loss incurred by the tuner, but it is going to be less than the extra 50 feet of coax, and much easier to fit in your Jeep. roof would be the best spot, but increases overhead clearance too much (and the antenna makes a high pitch wind whistle at 60-70mph. 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…). Add a cool, selectable color display to the mix and you\'ve got one excellent radio. At 10 meters the SWR were 1. Erm mines the 5 foot orbiter one i fink. Some also measure power output to check operation of the CB or amplifier. And of course the concept of SWR meters and Coax feed lines (along with un-tuned Transmitters), was further entrenched by the advent of CB Radio. Have fun on the radio. Re: How to tune your CB antenna SWR Post by SEIgivesmewings » Wed Dec 19, 2018 9:06 am Thanks for the input MikeB yes I took the set screw all the way out before I started and Have been using vicegrips and pliers I guess I will get some penetrating oil that should work better than w-d 40. While the SWR was then around 2 on channel 40 and about 3 on channel 1, this mounting location is not practical and the SWR is still far too high! Attachments: Please Log in or Create an account to join the conversation. 5:1 is probably okay. A meter may show a flat SWR but there are always losses. If the SWR is too high it can burn out the fianl driver transistors in the radio. This should ensure that at least the top channels of the EU band don't have too high a reading. It seems to work randomly and might go for a day with constant starting of the car but then it suddenly cuts out and wont start for a period of time. Those 'no-tune- circuits are never going to be exactly 'right' in all circumstances, they can't be by their very nature. The roof rack is not grounded, so you need to run a separate cable from the mount to a bolt in the chassis. Plotting SWR over frequency you should be able to determine if the antenna is simply too long or too short. They have never put high power modulators like that in any CB radio. I have a 2000 Peterbilt 387. 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?. It will all work together once you have the mount grounded. The built-in power supply is suitable for use with voltages from 200 to 250V AC. Protection circuits: - SWR too high - Anode current too high - Screen current too high - Grid current too high - Mistuning of power amplifier - Temperature to high - Soft start for fuse protection - “switch –on blocking “ at opened amplifier Indications: - OLED display 4 x 20 character. You can get an cheap SWR meter from Radio Shack. Swr too high new coax cobra 29 radio, truck spec oil filled ant Make sure the antenna is installed correctly. Example: I ran an FT-100 in my car and it had grounding issues inside the rig. A CB SWR meter is NOT suitable for VHF work. Any higher and my channel 1 SWR would be too high. Here is a shot of the BAD cable. You definitley need one and they need to be below a 2 I like them to be more around one with 1. 0 SWR in the centre of the 15 m band and then, on 17 m, to adjust C36 for an SWR < 1. I have recently bought an A99 and then I read this thread. A request that other operators tell you how your radio sounds. How To Get Low VSWR. While there are far too many things to cover here regarding SWR, I will offer some ideas on the subject. If you swr's are too high you will burn up your radio. For example, the VSWR value 1. The band width for SWR better than 1:2 is only a mere 45 kHz. Checks the antenna stationary waves and shutdowns the amplifier if the SWR is too high. I then ran the wire down to my frame, where I've made it bare for the ground to go. Lower dipole and cut off 3” from each leg. The non-plus-ultra is the vacuum relay. - SWR too high - Anode current too high - Screen current too high - Grid current too high - Mistuning of power amplifier - Hot switching protection - Soft start for protecting your fuses - “switch –on blocking “ at opened amplifier: Bar graph indications: - Power output – bargraph 50 LED - Reflected power – bargraph 20 LED. thats telling me the pwr is being reflecting back. You can see the tip is much narrower so the pin barely fits into the receptacle on the CB or SWR meter: That's something to keep in mind when buying this kit. Ameritron exclusive Adapt-A-Volt power transformer Too high line voltage stresses components and causes them to wear out and fail. A few of our most popular base station antennas are the PROTON99 and the PATRIOT. In the right circumstances, your cable can act as an inductor. If you go with a permanent mount antenna you should mount it in the most center location of the truck, usally at the top front bed rail right behind the back glass but this requires drilling. You can get an cheap SWR meter from Radio Shack. I have the fangars mount and it is sturdy and works well. If the standing wave is too high, the transmission on the CB or shortwave radio is inefficient. Expecting the worst, I turned on the radio and heard lots of. Connect a ground wire to a screw on the side of the radio, to ground the chassis of the radio. I have recently bought an A99 and then I read this thread. The issue could be the Standing Wave Ratio (SWR). Check the heat-sink temperature and, if too high, activates the second fans speed. You'll still need to check SWR but that will get you started. i have a swr of 1. 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. Recently bought and installed cb. I'm not familur with your CB or Antenna. If you have a problem with communication then you can press the high power button, use the radio for a short burst of important info and then press the high power button again to put it back into low power mode. The industry standard screw on CB connector is much bigger than the one on the HD CB. with the stubby 2' helically wound Astatic 11meter CB antenna, the SWR is the same. Maco V 5/8 Antenna Review Choosing a base station antenna isn't easy. When trimmed properly, the lowest SWR will be in the center of the CB band on channel 20. Important Stryker SR490HP Features Include: High Power Final Transistor - The SR-490 Stryker radio uses a single high power flange mounted 2SD1446 transistor that provides the user with 100+ watts Peak Power, after tuning. how do i connect 2 cb antennas to one cb. It has a SWR switch that also switches to field strength with a calibration knob. CB (or Citizens Band) radio is a type of radio that transmits signals on a channel shared by other CB radios. The trick is to set the squelch so it's high enough to stop the background noise (which is usually at a low signal level) but not have it set too high so that its cuts out the people you want to hear (hopefully they are at a higher signal level). Unintentional shorts or high SWR can damage the radios circuitry. If they are "firestick" style, you CAN carefully remove the cover from the tips. 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. Defiantly upgrade to a better antenna and with the static you said you were getting I'm betting your SWR is high, don't use the CB till you get your SWR checked/a better antenna other wise you'll blow the final and only be able to listen but not transmit. ive tested the meter (dosy 4001) on another station,its working right. A ham radio VHF SWR meter IS acceptable as its range is usually from 140 to 170 Mhz, which includes our VHF marine band. If SWR is lower on channel 1, then antenna is too "long" and needs shortened. very annoying). In the “S R” position, the meter indicates theW Standing Wave Ratio (SWR) of your an tenna (accurate at maximum power output). Also a neat feature is the SWR protection, it will shut you down if it is too high, and also has voltage gauge, that will shut you down if you have too much or too little power. So I was wondering if I was going to find the same problems with the SWR. SWR reads at about 2 on channel 20 and about 3 on channels 1 and 40. This lowered the rack about an inch, and it's it's perfect now (about an inch above the roof at the highest spot of the Jeep). While these trends may benefit some operators, it does create an issue for those CBer's who continue to operate within lega. It seems to work randomly and might go for a day with constant starting of the car but then it suddenly cuts out and wont start for a period of time. 2:1 is a little high, but usable. I bought a 5' Wilson Silverload antenna. Also, there is only one correct speed that will. If you want be heard, the Stryker SR-490 10 meter radio has the power required to do some serious talking. 0 SWR in the centre of the 15 m band and then, on 17 m, to adjust C36 for an SWR < 1. High SWR using magnet mounted Wilson “lil wil”. Prices are certainly beginning to fall on this new radio. The reflected power sensor with a toroid, is better placed at the T3 secondary before the LPF switching relay RL3, if the LPF is selected manually and can be on wrong band by mistake. Erm mines the 5 foot orbiter one i fink. If you swr's are too high you will burn up your radio. channel 1, 20 and 40 on the UK CB band. VHF is out of its design range and its directional coupler is too long. The SWR protection is based on reverse RF power coming back from antenna. SWR reads at about 2 on channel 20 and about 3 on channels 1 and 40. Features Include: 7-color meter light and channel display Large round meter that is easy to read Advanced NB/ANL Circuit Reduces Interference AM/FM Operation and PA Circuitry 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…. If you have an SWR meter available, cut the antenna 1 to 2 cm longer than required and then using the SWR meter, gradually cut small pieces off until achieving the best SWR. Sent from my SAMSUNG-SM-J727A using Tapatalk. We suggest checking the SWR on the top, middle and bottom channels on the band you will be using, i. The biggest thing you have to watch for is the SWR's. com The Radio Shack standing wave ratio meter (SWR) is used to check the standing wave of a CB radio or a ham radio. Has anyone had - Technology. Transmit only for a few seconds because in case the SWR is too high the transceiver could be damaged. The built-in power supply is suitable for use with voltages from 200 to 250V AC. They have never put high power modulators like that in any CB radio. Look at the meter’s SWR display. Adjust in increments of 1/8" Note: Keep doors closed and press transmit button each time you measure SWR. Whenever the antenna is mounted in such a way that this ground-plane or its effect is not perfect in relations to the 102" length of the antenna, the result of being out of resonance start to appear in high SWR and transmit-receive efficiency drops rapidly. Make sure the insulating washer is on top of the mirror mount. LPF inductance is probably too high, resulting in attenuation at the transmit frequency. Learning how to tune an antenna entails lengthening or shortening the antenna so that, for the radio's specific frequency, it is working as efficiently as possible. Too Low an SWR Can Kill You. This is a no ground plain antenna with bracket screwed into a wooden truss. 12 bass amp, swr workingman's 12, swr studio 220 schematic, swr working man, swr bass 350 head. -Can't I just buy an antenna and a cb radio and be set?. Minimal voltage drop is even more important if you're using an amplifier. SWR too high. I'm not familur with your CB or Antenna. 25 and on channel 40 its about 3. If it's lower on ch 40 than on 1, then it needs lengthening. Check SWR/CB Antenna Connections. The top community for Ford truck, F150, Super Duty, and SUVs owners and enthusiasts. A QRP load will do for the test as you should only need a watt or two to get an SWR reading and confirm that every switch position works without creating a mismatch i. That said, inductors are made by coiling wire. 4: While not good, this likely won't damage your radio with casual use. An amplifier that's 'spewing' harmonics, or is unstable is certainly one reason for a high SWR, but I'm afraid you're mistaken about the mis-tuned output circuits not being a possible problem too. Im with Uncle Fester on his one, careful use of vice grips and twist it back out should solve the issue. So I was wondering if I was going to find the same problems with the SWR. Only expensive high-class amateur radios have a good sound on their basic state. I'd also note that 19 feet up for a 40 meter antenna is not very high. Stryker (SR-497HPC) - AM/FM/PA, 7-Color LED Backlit Display, Black, Factory Warranty Only Description: No Store Warranty - Factory Warranty Only. The SIMBA SSB will work into an antenna system having an SWR as high as 3: 1. Unfortunately, on my current mount, it rides about 15'+ high and it's just too high for a daily ride around antenna. I'm not familur with your CB or Antenna. 4 ohms and SWR of 1:1. 5 to 1 has a loss of 4% which is negligible. The guidelines below give you a sense of what SWR readings in each range mean, and how to deal with excessively large ones. Anything over about 3. OM Power OM2000+ HF and 50 MHz Amplifier The linear amplifier OM2000+ is designed for all short wave amateur bands from 1. In the real world there is no perfect SWR. SWR measured with an analyzer ranged from 1. If you don't make the correct connections, your SWR meter won't give you accurate readings and will likely show high SWR readings whatever you do!. I also used a Bird Thruline and it was flat. 5:1 to 3:1 is acceptabe, but anything more than that and you are going to have a poorly operating system. For such tests, even a relative-reading meter is sufficient. SWR is another measurement that a CB radio meter might provide. How To Check Your SWR You're probably reading this page because someone recommended that you check the SWR of your CB antenna and/or adjust your antenna. Re: uniden pro 510xl and a rat shack antenna Edit: Didn't read the full thread title. Too low line voltage causes a "soft-tube" effect -- low output and signal distortion. Standing wave is way too high. HAVE A LOOK AT R51, THE HALF-WATT RESISTOR THAT LOOKS BURNED NEAR THE BOTTOM-CENTER OF THIS PICTURE! If this resistor looks okay, you're probably good to proceed. The base plate of the tower is 15"x15" square, I was going to make it 30"x30" inches square. INPUT 20 m. They usually support 40 channels, transmit at up to 4 Watts which is all you really need. i know its high cause the amp on low will only do about 50 watts and my meter says its doing 200. A quick test with my handheld CB showed that the unit works. This is not a good SWR test. Although both are directly dependent on each other. Has anyone had - Technology. A few of our most popular base station antennas are the PROTON99 and the PATRIOT. I've now fitted an awning to the back of my roof rack which meant the CB aerial was being obstructed so had to move. That's why you should never try to broadcast without an antenna connected. Well on the way home (before I read all of the replys to my original post) I went to an open field at the local elementary school and tested my SWR on channels 1 and 40 in 4 different kinds of conditions: 1) all windows open, engine off 2) all windows shut, engine off 3) all windows open, engine on 4) all windows shut, engine on. Using either the meter built into the radio or a good external SWR meter, calibrate on channel 20. CB (or Citizens Band) radio is a type of radio that transmits signals on a channel shared by other CB radios. If this SWR is too high the effectiveness of the transmission will be reduced. D) Repeat the procedure for CH-19 and CH-40 E) If all SWR results are very high (more than 3) probably there’s a short circuit in the cable or your antenna is defective. ; This is a 10 meter radio, not an 11 meter (Citizens Band) radio. Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. RCI-2970N2 10 Meter AM/FM/SSB Export Radio Review. until dipole has an SWR of 1. D) Repeat the procedure for CH-19 and CH-40 E) If all SWR results are very high (more than 3) probably there's a short circuit in the cable or your antenna is defective. It can be useful to check the sound of power & Echo microphones. Prices are certainly beginning to fall on this new radio. In order to tune an antenna, a radio needs to be hooked up to an SWR (standing wave ratio) meter using coaxial cables. Only the secondary SWR detection circuit on the TUNER unit, used only for the antenna tuner operation, is being altered. 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. best antenna would be a 102" whip, mounted onto your roof, wherever it gives you the lowest SWR reading, and then tuned to get it too a 1:1 reading. So when I get home and used the new cable, everything was fine. They were impressed about antenna and radio clarity. Ideally, a SWR of 1:1 is what we want for every channel, but it's not worth it to dial in this much. The performance is probably Ok for weak signals but my signal levels are much higher. The worse I saw was on 6m with a 2. I connected the SWR meter to the unit and, following the instructions, tested my CB to get an SWR reading. This is not a good SWR test. Protection circuits automatically bypass your amplifier to prevent damage and an LED lights to warn you. For such tests, even a relative-reading meter is sufficient. SWR too high. This is a relatively large drop indicating a relatively narrow SWR curve. 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. If you are only using a radio for short distances under 10 miles no amp is needed. Ideally, a SWR of 1:1 is what we want for every channel, but it’s not worth it to dial in this much. I set it up on a temporary pole on the back garden yesterday, not too high either. If you tune the antenna badly, it can turn your CB radio into a useless brick. A high SWR indicates a problem with your antenna and/or coax, but a 1. Transmit only for a few seconds because in case the SWR is too high the transceiver could be damaged. D) Repeat the procedure for CH-19 and CH-40 E) If all SWR results are very high (more than 3) probably there’s a short circuit in the cable or your antenna is defective. 000 MHz to 29 MHz. High and centered is still best here but you should keep the antennas as far apart as possible, preferable at different heights as well. Too high an SWR will cause abnormal heat buildup inside the radio as RF energy is reflected back into the radio. which I've read is too high. What can I do to get that down? I plan on ordering a SWR meter here soon. A 4 watt radio should. Coiling the coax is fine - it's shielded after all. The following list shows the most probable causes of high SWR in order from the most common causes to the least common causes. These are for those of you looking for a CB setup for either on the road or on the trail and are looking for a high-quality tunable antenna. I ran RG8X cable (25') to the shack, keeping things short as possible. If they are "firestick" style, you CAN carefully remove the cover from the tips. This has been fine, reasonable SWR and performance. I may use this as a back-up antenna for field day and find a new permanent antenna for my home base. 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. 5:1 to 3:1 is acceptabe, but anything more than that and you are going to have a poorly operating system. So I drilled an extra hole in the wing of the mount and moved the arm to the next hole down. increments. If you have an aluminum frame camper, keep the antenna away as far as possible from vertical frame members. The SWR protection is based on reverse RF power coming back from antenna. I went through the exercise of 6db vs 9db antenna, found the uni and omni directional BS too hard and got a hand held. The SWR difference between these two channels will tell you if the antenna is electrically short (channel 19 resonant frequency too high) or electrically long (channel 19 resonant frequency too low). Too high and your transmit PEP is shit, and you run the risk of burning up the power transistors in the back end. 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"). IMPORTANT: If the meter reading is in the red zone, indicating HIGH SWR readings, DO NOT operate the CB. If your SWR reading is too high then your transmit power isn't leaving through your antenna properly, and part of your radio's output power is feeding back to the radio. If you have a high SWR, double-check the coax cable and connector. That said, inductors are made by coiling wire. Shorted Stud Mount Disconnect coaxial cable at antenna mount. 4:1, does this mean that the amp is a 10meter/ cb amp?? I figured that I would hookup my mfj antenna analyzer to verify the swr. The difference in SWR at the reference point is 1. Touch one lead of meter or tester to the center pin of the PL-259 coax connector. If the SWR is too high, a lot of power will be reflected back into the radio internals which will destroy them, and either you will have a large repair job or your radio will be completely dead. #2 - The doublet with parallel feedline. Therefore it is best to assume that 50 ohms resistive load is the best to use at all frequencies and power levels. This is how dangerous running high watts is !!!! Welcome to the CB junkies cb radio forum You are currently viewing the forum as a guest. So to the bottom line: Yes, you can adjust an ATU for minimum SWR by watching the Antenna Current, but this is not a good idea as it assumes that the ALC protection mechanism reduces power with high SWR, and that the output stage is tolerant of highly reactive loads. I also bought an swr meter so that I could properly tune the antenna for best performance. If it does have a great effect, you may not have something grounded well (it is a very common myth you have to use a specific length of coax. In order to provide you with the best possible reviews and tables of the best connex cb radio, we examine a lot of customer feedback. until dipole has an SWR of 1. See how antenna height determines the radiation pattern. If SWR is too high, then shorten and repeat. Checks the antenna stationary waves and shutdowns the amplifier if the SWR is too high. Ricetrasmittenti ed attrezzature per Radioamatori e CB SWR too high - Anode current too high - Screen current too high - Grid current too high - Mistuning of. Well I am breaking ground tomorrow for the tower! Some last minute thoughts. To avoid damages to your CB transceiver DO NOT use it until the problem is rectified. SWR Meter Coax Connections A common mistake when tuning a CB antenna is mixing up the two coax connections at the back on the SWR meter. Lower dipole and cut off 3” from each leg. Those who repair, align or. basically it plugs into the cig lighter and i will have to mount it or set it somewhere. Sent from my SAMSUNG-SM-J727A using Tapatalk. I presume the aerial and coax cable are all functional as while doing a test, I got quite a surprise when I heard some voices coming through radio, talking in an indeterminate foreign language. The same antenna will work well on 20m (¾ wave either side) but we get into trouble on 15m because it is 1 wavelength long on both sides. You can get an cheap SWR meter from Radio Shack. I'd also note that 19 feet up for a 40 meter antenna is not very high. So, what do we do if the SWR is too high? If your SWR is dangerously high (3:1 or greater). SWR too high. 8 to 29 MHz (including WARC – bands) + 50 MHz and all modes. Just a barefoot Cobra 29 peaked and tuned will push in the 30 to 40 watt range. If your SWR reading is too high, it will not only cause poor broadcasting, but can ruin your CB if it is bad enough. Check the SWR of the antenna, make sure it is below 3. There are several methods for shortening an antenna which vary by manufacturer. General coverage transmisson modification for the TS-450 and TS-690. The final RF transistors in today's solid state radios are protected from too high of an SWR value. First Class Radio, Inc. Frankly I prefer 27MHz as the skip gives far better distance (bounced off the ionosphere). Radio Check. Some radios could blow the finals if the SWR is too high, and your radio doesn’t automatically cut back power. That said, inductors are made by coiling wire. also, have the swr checked if at al possible, if its too high, itll burn up that CB. The SSB CB radio market has been a little stagnant over the last 5-10 years, with only a couple of new models hitting the shelves and export radios taking a large share of the market. If the SWR on channel 1 is higher than that on channel 40, your antenna is too short. Large losses/poor SWR can also be caused with things like bad antenna connections, poor quality coaxial cable, poor sealing of the coaxial cable on the outside of the vehicle and bad. Well on the way home (before I read all of the replys to my original post) I went to an open field at the local elementary school and tested my SWR on channels 1 and 40 in 4 different kinds of conditions: 1) all windows open, engine off 2) all windows shut, engine off 3) all windows open, engine on 4) all windows shut, engine on. (b) What if I accidently tune to one of the HF bands and key the mic? Will it transmit and damage the radio? Or will the radio determine the SWR is way too high and decrease the output power (possibly all the way down to no output)? Or will it attempt to transmit via the VHF/UHF Larsen antenna and, if so, what will be the result?. If you swr's are too high you will burn up your radio. By removing the rubber protector boot thong off the base of the mag mount, I've been able to get the SWR down to around 2. Antenna is a Thunderpole Orbiter (1. We recommend using rope and a pulley to hang the center balun, so the antenna can be easily lowered for easy access. Only the secondary SWR detection circuit on the TUNER unit, used only for the antenna tuner operation, is being altered. If you don't make the correct connections, your SWR meter won't give you accurate readings and will likely show high SWR readings whatever you do!. The end result is a 12 foot mast which is high enough for testing/tuning and if I need to make changes I can easily drop the top section down and adjust the antenna and then put it back up again. The final RF transistors in today's solid state radios are protected from too high of an SWR value. Safe operation of your CB should be with an SWR of 2:1 or less. If the match is too high, then take a pair of wire cutters, and trim the end back just 1/4″ at a time until you get the lowest [reading] match you can possibly achieve. 3) High antenna SWR normally caused from lack of ground. The 3 footer doesn’t stick up too high. "Secret" CB antenna for automobile. So if you figure that the CB is putting out 3. If you're using this for an actual CB, I wouldn't be as concerned about ground plane, as I would be the SWR. You could potentially damage your radio. If you have an aluminum frame camper, keep the antenna away as far as possible from vertical frame members. The following list shows the most probable causes of high SWR in order from the most common causes to the least common causes. We all know what an SWR reading is right? Power reflected back down the feedline, or coax that the antenna is not radiating. -Can't I just buy an antenna and a cb radio and be set?. I'd try a braided cable but the cb antenna was a little bit heavy for that mount. Has anyone had - Technology. basically it plugs into the cig lighter and i will have to mount it or set it somewhere. If SWR is too high, then shorten and repeat. I cannot shorten the adjustment enough and my SWR is always too high. Whilst these can reasonably safely be used on the 10m band they are liable to produce a high swr on other amateur bands. Never-the-less, they can easily handle medium amounts of power (say, 1kW), as long as the SWR is not too high. Plotting SWR over frequency you should be able to determine if the antenna is simply too long or too short. Checks the antenna stationary waves and shutdowns the amplifier if the SWR is too high. You guys should get the antenna away from the cab. If the SWR is too high it can burn out the fianl driver transistors in the radio. 0 (channels 1, 40, and 20). 5 to 28 ft high •20 meters and above or 80 meters and above •Radials required •Tuner required •Remote tuner at the base is best. 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. do not isolate the ground from the mount. and that the ground is connected to the ground of the coax. Our reviews study for galaxy cb radio will help you choose the top sellers affordable galaxy cb radio. Too high line voltage stresses components and causes them to wear out and fail. If you want be heard, the Stryker SR-490 10 meter radio has the power required to do some serious talking. G8JNJ Broadband HF Vertical Antenna - Requires no tuner - copied by many companies. This is a no ground plain antenna with bracket screwed into a wooden truss. 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. If you tune the antenna badly, it can turn your CB radio into a useless brick. It was so good that I had to order one for myself. If the SWR on channel 1 is higher than that on channel 40, your antenna is too short. I tested my SWR with a spare CB that has a tester built in. Too low line voltage causes a "soft-tube" effect -- low output and signal distortion. The best practical antenna for CB is a 102" whip mounted to the rear bumper, if you have a fiberglass unit. For example, an HF 500 watt mobile amplifier draws between 25 and 40 amps average with peaks of about 100 amps including the driving transceiver. It transmits and receives using Amplitude Modulation (AM). Adjusting the SWR on this antenna can be accomplished in two ways. If your getting static or poor performance on a HD system you could be having another problem or a bad CB. Ideally, a SWR of 1:1 is what we want for every channel, but it’s not worth it to dial in this much. How To Get Low VSWR. There are 5 switches on the front as well. And of course the concept of SWR meters and Coax feed lines (along with un-tuned Transmitters), was further entrenched by the advent of CB Radio. Protection circuits: - SWR too high - Anode current too high - Screen current too high - Grid current too high - Mistuning of power amplifier - Temperature to high - Soft start for fuse protection - “switch –on blocking “ at opened amplifier Indications: - OLED display 4 x 20 character. The antenna performs well - but the SWR is a real concern.