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Cobra 19 ultra III...have everything hooked up(havent used a SWR METER YET) but when I have the squelch on just a bit, it shows all the channels as busy? What do i do?

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Right, the meters will show a signal nomatter what posistion the knob is .... put it counterclockwise just about the noise level.. I leave it fully counterclockwise so i can hear further... BUT get a swr meter and check it asap before talking on it.. Any cb shop should check the swr's for FREE, we do...

Posted on Mar 29, 2011

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Cobra 19 ultra iii


Do you or a friend have a SWR/Power Meter? If the Standing Wave Ratio of the antenna and feedline is to high you will not get the power from the radio to the antenna. You want you SWR to be 1.3 to get a good signal from your antenna. Most antenna have a set screw that is loosened and tightened after either lengthening or shortening the antenna stub.

Apr 09, 2014 | Radio Communications

1 Answer

Static in my cobra ultra 3.


The easiest way to check this is to hook an SWR meter to the antenna to see if the cables are ok. If the SWR is low then it would show no problems in the transmit and therefore the receive would be good.

Mar 03, 2014 | Cobra 25 LTD 40-Channels Base CB Radio

1 Answer

How can I fix SWR's spiking and staying spiked?


Turn the squelch all the way down to the point that you can hear the hissing from the speaker, when you release the transmit button on the mic you should hear the noise from the speaker and at that point the EXTERNAL METER should not be showing anything. IF it is then the radio is not stopping transmission when you release the microphone button. Instead of letting go of the microphone button, try unplugging it and see if it does the same thing. Also to note the SWR that you are showing when transmitting is not that high. Also can you post the make and model of the SWR meter that you are using?

Jun 10, 2013 | Cobra 29 NW LTD

1 Answer

I just need to know how to use it for conversations and what every turn dial means.


you need to hook this up to an antenna. If you are putting it in a car, you need a mobile antenna, if in a house, you need a base antenna. The antenna needs to be tuned for best SWR or you will damage the radio.

Starting from the left of the radio.

Knob 1. Volume/ squelch. The little knob does the volume of what you hear. Big knob squelches out static noise.
knob 2. Dynamike. This is the volume of your voice transmitted. Its how loud people hear you.
Knob 3. RF gain. This is the receive sensitivity. The higher you turn this, the further you can hear. There is almost no reason for you to have this anywhere but full.
knob 4. Delta Tune. This knob should be in the center. If you encounter some one transmitting off frequency, you can move your receive up and down frequency so you can tune that person in. It does not effect your transmit frequency.
Knob 5. CAL. This is to calibrate the meter for taking an SWR reading off the antenna.

Switches starting form the left.

Switch 1. Meter switch. S/RF - will show on the meter, Your signal going out when transmitting, and the signal coming in while receiving. SWR - will show on the meter, your SWR on that channel after you have calibrated the meter. CAL - This is used to calibrate the meter in conjunction with the CAL knob.

Switch 2. ANL - Automatic noise limiter. - This gets rid of electrical interference noise from the vehicle, or other interference sources. ANL/NB - This is the same as ANL, but with NB "noise blanker" This function blanks louder noises that may make it hard to hear people. It's kind of like an automatic squelch, but not nearly as effective as the actual squelch. Also, NB will lessen your receive in that, really low signals will be blanked out.

Switch 3. CB - the radio is in CB mode. This is the normal operation mode of the radio. You can transmit and receive as normal. PA "Public Address" - If you hook a PA speaker to the PA jack in the back, you can mount the speaker on the out side of the vehicle, and talk over it (Its loud). Also, anything you receive over the radio when not holding the mic key, will come over the PA speaker. This is useful when you are not in the vehicle, and need to hear when some one comes on the radio.

Switch 4. BRT and DIM - this is the brightness of the meter light and channel display. BRT stands for bright.

Switch 5. Normal and CH 9, When the switch is in the normal position, everything is normal, but when you flip it up to CH 9 it instantly puts you one channel 9 with out having to turn the dial. CH 9 is the international emergency channel. So it lets you go to Channel 9 quick. when you put it back to normal it will put you on the channel you were on.

Meter explanation. - You have 3 horizontal lines on the meter. the top line is your SWR (only when in SWR mode on the switch. The next one down is you Signal going out. And the bottom one is your signal coming in, in DB's. ***Also noted that part of the SWR line has a CAL )calibration mark. When you have the switch in CAL, and key the mic, you turn the CAL knob up until the needle is at CAL triangle, and then put the radio on SWR and key it. where the needle falls, on the top line is your SWR. If it is in the red your antenna is not tuned, and you can damage your radio.


HERE IS HOW TO TUNE YOUR ANTENN:



It is important to tune your CB radio antenna to the proper length. The length must exactly match the wavelength of the frequency you transmit on. Or be really really close.

All Cb antenna's have a way to adjust the length of the antenna. If it's a mag mount, the metal whip can be slid in and out of a metal collar. Usually a set screw. If its a fiberglass whip, the way to tune it is on top. It either has a small metal rod with a set screw to adjust the length, or it threads in and out to adjust length.

Either type you have it will need to be adjusted for proper length. Here is how to tune the antenna to lowest SWR.

Some radios have a built in SWR meter. Some do not. If yours doesn't have an SWR meter, then you have to use an external SWR meter. Radio shack carries one, and you can find them cheap on ebay.

If you have a built in SWR meter or external, the procedure is the same:

1. Turn the radio to CH 20.(This is the center of the band.)
2. Switch the meter switch to CAL. (CAL stand for calibrate.
3. Key the radio. (Important. Do not talk while keying the radio.)
4. turn the CAL knob up until the meter hits the CAL mark.
5. Now while still keying the radio flip the meter switch to SWR.

Where the meter falls after that point is you SWR reading. If its above 3, that is real bad. 2 is not gonna kill your radio but its not the greatest. 1.5 and under is a good place to be, but the lower the better.

If your SWR is high, Here is how to find out if your antenna is too long or too short.

1. Turn to CH 1
2. Repeat SWR procedure. You must calibrate every time you do it.
3. Remember the SWR reading.
4. Turn to CH 40.
5. Again repeat SWR procedure.
6. Compare the reading between CH 1 and CH 40.

Now if the SWR is higher on channel 1 then channel 40 your antenna is too short. You must make it longer.

If the SWR is longer on channel 40 then on channel 1, then the antenna is too long, you need to make it shorter.

Make height adjustments about an eight inch at a time, and take reading each time.

once the SWR is significantly lower and the reading on channel 1 and 40 are about the same, you a about matched. At this point turn the radio to the center of the band, channel 20 and take an SWR reading.

You should now have a low SWR reading, 1.5 or under. If you are 1.5 or under, you are good to go.

If you cannot get the SWR to an appropriate level, there may be an antenna problem.

Nov 12, 2010 | Cobra 29 LTD CB Radio

1 Answer

Have a cobra 148 gtl cb/ssb. It is brand new. I hvae it hooked up and have tuned the antenna using the swr meter on the cb. I habe channel 1 and channel 40 metting at about 1.6 swr. I have what appears to...


Hi, my name is John. Welcome to FixYa. Check your antenna, you need to set it with a real SWR meter, pick one up at any near-by CB shack $10.00. Thanks for choosing Fixya...John

Jul 22, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Have Cobra 29 LTD Classic, no sound when hooked to antenna, no light or meter movement on the RF/SWR meter, DOES have power to radio and channel display, any tips to repair, or check for problem areas?


check the squelch by turning all the way both ways. check the external speaker socket. if it is the swicthing type it could be either bad conntact or dry joints. try an external speaker to see if that works. another thing is I believe it wont work if the microphone is not pluged in or connection fault there. Good luck.

Jul 25, 2010 | Cobra 29 LTD CB Radio

1 Answer

WHEN I TAKL HAVE DISTORTION MY COBRA IS CB COBRA 19 ULTRA 111 BUY NEW. SOME PEOPLE SAY YOUI ARE OUT OF FQ.


your not out of frequency. Your antenna is not tuned.

It is important to tune your CB radio antenna to the proper length. The length must exactly match the wavelength of the frequency you transmit on. Or be really really close.

All Cb antenna's have a way to adjust the length of the antenna. If it's a mag mount, the metal whip can be slid in and out of a metal collar. Usually a set screw. If its a fiberglass whip, the way to tune it is on top. It either has a small metal rod with a set screw to adjust the length, or it threads in and out to adjust length.

Either type you have it will need to be adjusted for proper length. Here is how to tune the antenna to lowest SWR.

Some radios have a built in SWR meter. Some do not. If yours doesn't have an SWR meter, then you have to use an external SWR meter. Radio shack carries one, and you can find them cheap on ebay.

If you have a built in SWR meter or external, the procedure is the same:
  1. Turn the radio to CH 20.(This is the center of the band.)
  2. Switch the meter switch to CAL. (CAL stand for calibrate.
  3. Key the radio. (Important. Do not talk while keying the radio.)
  4. turn the CAL knob up until the meter hits the CAL mark.
  5. Now while still keying the radio flip the meter switch to SWR.
Where the meter falls after that point is you SWR reading. If its above 3, that is real bad. 2 is not gonna kill your radio but its not the greatest. 1.5 and under is a good place to be, but the lower the better.

If your SWR is high, Here is how to find out if your antenna is too long or too short.

  1. Turn to CH 1
  2. Repeat SWR procedure. You must calibrate every time you do it.
  3. Remember the SWR reading.
  4. Turn to CH 40.
  5. Again repeat SWR procedure.
  6. Compare the reading between CH 1 and CH 40.
Now if the SWR is higher on channel 1 then channel 40 your antenna is too short. You must make it longer.

If the SWR is longer on channel 40 then on channel 1, then the antenna is too long, you need to make it shorter.

Make height adjustments about an eight inch at a time, and take reading each time.

once the SWR is significantly lower and the reading on channel 1 and 40 are about the same, you a about matched. At this point turn the radio to the center of the band, channel 20 and take an SWR reading.

You should now have a low SWR reading, 1.5 or under. If you are 1.5 or under, you are good to go.

If you cannot get the SWR to an appropriate level, there may be an antenna problem.

Jun 21, 2010 | Cobra Radio Communications

1 Answer

I have a coba ultra 19 iii in myt truck what is


You need to buy an antenna that is designed for use with a CB. A couple of good ones are the Wilson 1000, Wilson Lil' Wil, K30, K40. You will only pick up "everything" within the 40 channels with that radio.

Jul 09, 2009 | Cobra 19 Ultra II CB Radio

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