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How can I prevent water from getting under my mag mount lil wil cb antenna? When it rains water gets under there and throws off my SWR

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  • Radio Commun... Master
  • 1,795 Answers

Wrap your mag in a plastic sandwich bag. tie the top of it closed tight with a tie wire and have at it.

Posted on Apr 20, 2015

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

SOURCE: SWR calibration waaay off the chart

double check your connections and your cable for shorted PL 259 connectors. Oil filled antenna! Humm Sham on you if you are using a liner! Oh and quit sniping the antenna remember the higher in frequincy the shorter the antenna and longer for lower in frequincy. So it could be just where the antenna is located some antennas work good there but a diferent one wont try another spot also make sure your in a clear area when checking SWR not your drive way next to the garage or house or other car and finaly use an external SWR meter the ones on the radio some times SUCK.

Posted on Jul 07, 2007

One Wire
  • 126 Answers

SOURCE: SWR calibration waaay off the chart

You are using an inline swr meter to set your swr right, not looking at the meter on the radio? Here is the process to set swr on an antenna:

You must have an inline swr meter, which can be purchased online or from a truck stop. The ones at truck stops are cheap ones, but will do the trick for the most part.

You connect your antenna 18ft coax to the antenna plug of the swr meter, and a jumper coax (any length) to the transmitter plug of the swr meter and then to the radio.

Close all doors and make sure no one is messing around with the vehicle or antenna. You must be set up as you would normally be transmitting.

Now set your cb radio to channel 40 and your swr meter to fwd. Key up your microphone1.gif and at the same time turn the set knob on the swr meter until the needle is at the line that reads set. Unkey your mic and set the the swr meter to ref. Key up again and note what your reading is. Now leave the swr meter in ref and turn the cb to channel 1. Key up and take your reading. If the reading on ch 1 is higher than ch 40 you must raise the stinger on your antenna. If ch 1 is lower than 40, you lower your stinger. You are trying to get lower than a reading of 3 and as close to 1.5 as possible. If you lower your stinger as far into the antenna as it will go and you need it shorter, you cut the bottom of your stinger no more than 1/2" at a time, and recheck your swr reading after each cut.

Once you have gotten the best reading you can, connect your antenna directly back to the radio.

The setting of your swrs is to make your antenna as efficient as possible, by trying to get it as close as you can to a 50ohm impedance. THE ONLY PART OF YOUR SYSTEM THAT CAN CHANGE YOUR SWR IS YOUR ANTENNA, not your coax and not your radio. Your radio and coax can give you false readings, but only the antenna can actually change the swr.

On the swr meter, the fwd/ref switch stands for forward (power that is being transmitted out) and reflected (power that is reflected back into the radio.

Just for information sake, the swr cal switch on your radio is used to set the meter to reflect the swr that your antenna is set at. The meter on your radio is like a dummy light on your car. ONCE AGAIN, YOU CAN NOT SET YOUR SWR ON YOUR RADIO, only the antenna.

Posted on Jan 23, 2008

  • 39 Answers

SOURCE: I installed a browning br-51 cb antenna on my cb radio.

You need to shorten the antenna,adjust the whip all the way down and see what you have and then cut off 1/4" at a time remember this low on 1 high on 40 it needs to be lengthened high on 1 low on 40 it needs to be shortened . I hope this helps and good luck.

Posted on Apr 12, 2009

tneubauer
  • 437 Answers

SOURCE: Cant get SWR below 3.5

A ground wire will not replace the lack of ground plane. Try a different antenna altogether (possibly one with a magnet mount) and mount it on some metal surface like even the front hood and retest.

I am sure the problem you will find is with the lack of a proper ground plane.

Posted on May 31, 2009

tbirdfan1
  • 3051 Answers

SOURCE: With my CB I am getting feedback through the am fm radio speakers

Hello there:
the shielded coax rgu-45 series is probably the best one for this application also if you run the radio to a different fuse or u can also get a surpression filter that goes on the coax line I own a WL9000 KW. i had the same problem untill i got the filter installed at a loves truck stop in texas and no more problems since ok?
drive safe and best regards mike (warner transp.)

Posted on Aug 17, 2009

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1 Answer

CB Antenna Warning Light


Sounds like bad SWR. Check antenna ground. If mag mount, make sure mag and whe you put it is very clean. Check antenna where whip comes in to coil or base. Check pl259 with vom for continuity, open or shorts. This will probably solve the problem. DO NOT TRANSMIT WITH HIGH SWR. YOU CAN BURN OUT POWER TRANSISTOR. HOPE IT HELPS.
Tom

Oct 20, 2012 | Cobra 29 Lx Full-featured Cb Radio

1 Answer

Cobra 25 uk ltd when mic keys needle spikes


It is important to ground the antenna well,get an swr meter and check the swr it needs to be less than 1.5

Jun 13, 2012 | Cobra 25 LTD 40-Channels Base CB Radio

1 Answer

The light for high swr keeps coming on. replaced antenna and coaxle. how do i go about lowering the swr. is there a nob or switch for this. thank you


You cannot lower the SWR via the radio. it has to do with the antenna. The length of the antenna is essential to transmitting properly. It must match the transmitting frequency.

To check SWR tune to ch 20. Flip the meter switch to CAL. Key the radio without talking into the radio. Turn the CAL knob up until the meter needle is at the CAL mark. Unkey the mic. Flip the meter switch to SWR. key the radio again, and the meter will show your SWR. We already know it is high because you are getting antenna warning, but we will have a base line now to work on.

What you did was calibrate the meter for that channel. that is necessary to check the SWR. So you must calibrate for each channel you check.

You should at least be under 2 swr. Ideal is 1.5 or under. the lower the better.

If your SWR is high, your antenna is either too long or too short. To find out here is what you do:

Check the SWR on ch 1 and ch 40 calibrating for each channel. Compare the difference of the SWR between 1 and 40. If the SWR is higher on 40 then 1, your antenna is too long. If your SWR is higher on 1 then 40 your antenna is too short. All CB antennas have a way to adjust the length.

If its a mag mount, its usually a set screw you loosen to raise or lower the whip. Fiberglass antenna's usually have something under the cap at the tip to adjust. It will either be like the mag mount, with a set screw and a small rod to raise or lower it, or a screw, that you screw in or out to make it longer or shorter.

make small adjustments. 1/8th or a 1/4 of an inch at a time. Each time you make a change, take an SWR reading on 1 and 40 again and compare the difference. The difference should be getting less. Do this until there is very little or no difference between 1 and 40.

Then you go back to 20, because it is the center channel and check the SWR there. It should now be low. If you did a good job it will be under 1.5 and you are good to go.

Aug 07, 2011 | Galaxy Radios DX-93T Base CB Radio

1 Answer

My radio is about 4 years old. A year ago I had it sent it to get worked on and everything was fine with it when it was sent it. I got a mini wil magnetic antenna mount and it worked great for about 9...


The little wil is not a terrific antenna. I have one and I can't get it less then 1.7 no matter what I do, and I have an antenna analyzer that lets me see real time what it's tuned at while adjusting the antenna. I tried it on another vehicle and I couldn't get it under 2 swr no matter how I adjusted the antenna.

A barefoot radio should be fine with an SWR of 2 or less, however I do not like to run any radio above 1.5 SWR, and I like to get it even lower then that.

I recommend stepping up to a wilson 1000. I have been able to get every wilson 1000 I have ever tuned down to at least a 1.1 SWR. A true 1.1. You cannot get a true SWR from the meter in the radio, you need an analyzer. So if you can get it too a 1.1 on an analyzer then you have a really excellent match.

Little wil is an inexpensive antenna made for some one who is not a serious CB'r. It for the guy/gal who wants a radio for emergency. If you are planning to talk a lot on the radio, go up to at least a wilson 1000.

Oct 23, 2010 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

Having trouble setting swr .moved anttena up and down 1/4 inch at a time and there is no change


There are several things that can cause you not to be able to get an acceptable SWR.

The first is the most obvious. Poor antenna, or bad coax. Make sure your coax is good. Make sure the antenna is mounted in a good location.

Some things I have seen that cause this problem.

  • Wilson Little wil, almost impossible to get under a 1.6 SWR.
  • Fiberglass antenna's, a break in the wire near the top of the antenna. Will show the antenna as being too short, and adjusting the top will do nothing. This antenna is no good.
  • Common mode current. This is when the RF is traveling back down the outside of the coax, and or causes the coax to act like part of the antenna. SOLUTION. As close to the antenna as you can, take 6 to 8 inches of coax, and coil it into a tight coil, about the diameter of a spray paint can. In fact using a spray can to wrap the coax around works well. Use electrical tape to secure the coil so that it will stay tight and uniform. This will stop common mode.
  • missing foil/vinyl membrane on bottom of magmount antenna. This is essential for the antenna to see ground plane.
  • bad connections on coax connector.
  • Cracked isolator on stud mount.
  • incorrect procedure for taking SWR reading.
  • Poor location of antenna. E.g. antenna's load not above roof of vehicle.
  • Incorrect length whip being used.
  • corrosion of any part of the antenna system.
There are some cheap antenna's out there that you just can't get lower then say a 1.5 or worse, like the wilson little wil. Wilson makes great antenna's. The 500, 1000 and 5000, as well as their silver load antenna's are excellent. I have been able to get them all to at least a 1.1 SWR, and some like the 5000, and silver load fiberglass whip to 1.0 using an analyzer. The Little will is just a poor antenna. Anything under 2.0 SWR is okay of a barefoot radio, although I don't like going over 1.5 my self. A barefoot radio, will do a 2 swr all day. If the radio is stock, and not peaked and tuned, 2 swr is fine and won't hurt the radio.

You should always try to get the lowest SWR that you can in any case. The lower the SWR, the more RF energy is leaving the antenna. As well, receive will improve the closer you get to a perfect match. This is known as being "On Que".

Check everything I have listed that applies. And if nothing fixes it, you may want to try a different antenna. Some antenna's just don't work well on certain vehicles.

Oct 13, 2010 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

I want to get an external magnetic base antenna to increase distance. What do I need to buy and how do I adjust the radio for the antenna? Or do I need to adjust anything?


swlovett,

The best out of the package antenna for a magnetic I have experienced has been the Wilson "Lil Wil". As long as the instructions are read and followed correctly and adjusted with a good working SWR meter you should not have any problems. Make sure the ground is good on the base, and adjust the lowest SWR on channel 20. Then check the other channels 1 and 40 to make sure the SWR reading is even. If you cannot get a good reading anywhere, check the ground and readjust the base. Should you continue to have a high reading you may have to trim the length of the antenna according to instructions included with the Wilson Antenna. Your radio should not need any adjustment and is factory preset and tuned. This is instructions for the "Little Wil", however, you may choose some of the more broadbanded antennas that are longer and easier to tune, although more pricey.

JT Radiojunkie

Jun 04, 2010 | Midland 75-785 Handheld CB Radio

3 Answers

What antenna would you recommend for my cb? cobra 29ltd


depends on what vehicle its going on. If its a car, you don't need anything crazy, unless you are going to run a linear.

You are fine with a wilson 500/1000 mag mount or a k40 mag mount.

just make sure you tune the antenna for lowest SWR.

Sep 29, 2009 | Cobra 29 LTD CB Radio

2 Answers

Maximize my cobra18 WT ST


A good antenna goes along way for your transmit distants. It does close to 90% of the work on that side of things, but also remember that the radio itself does most of the recieveing. I good antenna brand to stick with is Wilson they make several units but for you a Wilson Little Wil would do the trick. There not real tall about 3' and cost around $40.00. If you want more performance a Wilson 1000 Mag mount is one of the highest performance antenna's on the market but its tall around 5' and cost somewhere around 80.00-90.00 . You can tune the radio and get alittle more out of it but not much, get a good antenna and go from there you will like it. Dont forget that any antenna has to be tuned (swr set) to the vehicle this will insure max performance.

Jun 24, 2009 | Cobra 18 WX ST 40-Channels Base CB Radio

1 Answer

I set the swr on my antenna and it keeps moving i have a cobra 19 dx iv and i just installed a net window mount antenna 27" on my back window that has factory tint.


1) if you are talking, your SWR will most likely move. You must take the reading while not modulating, (talking into the mic)

2) Window mount antenna's are GARBAGE. they are worthless. BAD BAD BAD. You wasted your money. Get a mag mount.

3) if you are not in an open lot, your SWR's will be different due to structures reflecting signal back. Always take your SWR reading in an open lot.

4) You could be experiencing Common mode currents. Normally the signal travels on the inside of the coax ground. Common mode current is when the signal is traveling back down the coax on the outside of the ground in the coax. (The biggest cause of this would be the window mount antenna). If you want to keep that garbage antenna, then you can make an RF choke in the coax. The best solution is get a better antenna. Here is how to make the choke. As close to the antenna as you can, take 6 ft of coax and loop it uniformly laying each coil next to the other. use electrical tape to hold it in place. You want 6-8 wraps. You want a nice uniform coil.


Just get a better antenna. Window mounts are the worst. You get horrible receive and horrible transmit. Get a wilson 500 mag mount. It will work so much better for you.

Apr 21, 2009 | Cobra 29 LTD CB Radio

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