Question about Cobra 19 DX IV CB Radio

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I put this radio in my truck with a magnet mounted antenna, I was told by truckers that it sounds like I am transmitting between channels, something like 18 or 20, don't know what that means or how to fix it

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The radio could be off freq. did you buy it new if you did exchange it if not somebody may of tinkered
with the channel pod. make sure your antenna is tuned as far as swr's the only thing you could do is take it to a radio tech and have him adjust it back on freq not alot of adjusting you can do to that radio but a tech should be able to adjust it back on for little cost.

Posted on Apr 07, 2011

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Posted on Jan 02, 2017

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1 Answer

Do i need a certain antenna?


The fiberglass provides no ground plane area for the antenna and radio waves. Your Standing waves (aka: SWR or Reflect) are probably very high. I suggest mounting the antenna on the cab of the truck. You "could" try aluminum tape on the cap and mount the sheilded side of the coax to it somehow. Without a ground plane much of the RF Power of you CB will be reflected back to the Final Output Transistor(s) (Final or Finals), overheat it and possibly damage and burn it/them out. If you are just running the CB without an amplifier(Linear or sometimes called a box), a magnetic mount antenna should work fine and be less of a problem than permanently mounted antennas. That's a plus when going into a parking garage. Even if you decice to get an amplifier at a later date, you should be able to use it with the magnetic mount antenna as long as the antenna you but is rated for several hundred watts, you Standing Waves are Low, and the amplifier doesn't put out more power than the antenna is rated for. I hope this helps.

Apr 17, 2014 | Midland 1001Z 40-Channels Base CB Radio

4 Answers

Handheld Radio Shack CB radio TRC-230 I can hear people but no one can hear me


First, lets make sure that the unit does transmit. Get a power meter and see how much power it transmits. If no power is being radiated, you need to have a technician check out the unit.
If you have power then pick a less crowded time to test out if anyone can hear you. Other people with more powerful equipments can only be a problem when you are transmitting on the same channel and both of you happen to transmit at the same time all the time. Chances are remote that this is your problem. Good luck. es

Mar 23, 2013 | Radio Communications

1 Answer

When i que my mic the display light shows no antenna light unless im touching the antenna i tried this on 2 different trucks


The mounting and adjusting of the antenna is crucial,if it is a magnet mount,the surface must be clean,dry and best to not have any rust,also bottom of the magnet needs to be clean and mount it to the largest area of metal on the vehicle...the trunk lid,middle of your roof are the best.Permanent mounts need to be touching bare metal at the mounting hole not paint,again either mount requires SWR adjustments to match the radio it's attached to,it may require trimming of the metal"whip" if it needs to be lowered for the best reading,also don't rule out the radio chassis might need to be grounded as well.For general safety I would not recommend touching an antenna while it is transmitting any radio signal...if all above is good,you transmit and receive fine,more likely light is faulty or needs it's sensitivity adjusted...Good luck,hope this info helps.

Sep 03, 2011 | Cobra 29 LTD CB Radio

1 Answer

Can not remember what the proper settings are for all the switches on an Uniden Trucker PTC104


I don't have one on my bench, but I found a picture of one online.

By what I see, here is how you need the switches set:

Mic Gain - turned clockwise, depends on how much modulated power you want to put out.

Squelch - turn all the way counter clockwise to open it up. Then turn it clockwise to set it where you want.

RF Gain - Turn all the way clockwise will open it up, then turn back counter clockwise to where you want it set.

SWR Cal - only used when the SWR/Cal switch is put in the Cal position. After you know the SWR of the antenna, you can use it to set the meter (while keying up) to what was read.


Cal/SWR/(can't read the bottom letters on the picture) - set to Cal to calibrate the meter to the SWR of the antenna, set to SWR so that if something happens to the antenna system, it will go high and you know there is a problem, set to the bottom to see the output power and incoming signal power on the meter.

ANL-NB/NB/OFF - set to the top to turn on the Automatic Noise Limiter and Noise Blanker, set to the middle to just turn on the Noise Blanker, and set to the bottom to turn both off.

PA/CB - turn to PA if you have a pa speaker connected to the radio, this will let you talk through the speaker. Turn to CB to talk on the cb radio channels.

CH9/(can't read but probably says NORM) Set to CH9 to lock the radio on the channel 9 emergency channel. Set to the bottom to use the channel selector to choose the channel to monitor or transmit on.

And lasty, but obviously, set the channel selector to chose the channel to monitor or transmit over.


This should help you out completely. If you have anymore questions at all, don't hesitate to contact me at rollincbmods@yahoo.com. I will answer any and all questions I can.

Dean Pitts
Rollin CBs
Mount Vernon, TX

Apr 07, 2011 | Uniden Radio Communications

4 Answers

Have not used my cobra for some time ...sine someone need my K40 antennae more than me. Just put it back in service with a new magnet mount 36 inch - can send and receive in USB and LSB ....can here in the...


Center the antenna on the vehicle, then check the SWR on channel 1 and channel 40.
with the switch in CAL position, key radio and use the swr/cal knob to set the meter so the needle is just touching the end of the red area on the right-hand side of the meter.
Once calibrated, unkey and switch the switch to SWR and key up again. The lower the reading, the better. If the SWR is Higher on 40, the antenna needs to be shorter.. if its higher on 1, then the antenna needs to be longer.

if it dont transmit period on AM, then there's an internal glitch :)

Jan 24, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

3 Answers

How do i install a cb radio on a pick up truck


You will need a CB radio antenna, The CB radio and mounting hardware as well as the power wire.

Choose a place to mount the radio. Mount it. Run the power wires from the radio to the fuse box. Put red wire in with the fuse that is hooked to switched 12 volt. Ground the black wire to any metal of the vehicle.

Next find a place to mount the antenna. If you use a mag mount, the roof of the cab is a best bet. Run the wire into the vehicle, it can go through the door, just make sure its not going to get pinched.

Hook the coax from the antenna to the radio

Now you have to tune the antenna. this is important because if you don't you you will blow the transmit final transistor out in the radio.

This link will take you to an article that will explain how to tune your antenna.

Nov 04, 2009 | Cobra 25 LTD 40-Channels Base CB Radio

2 Answers

Not able to transmit or recieve on cb radio in car


It could be your ant. a broken coax wire or a bad ground could cause this a could a broken or shorted wire on your mic.

Jun 02, 2009 | Maxon Radio Communications

1 Answer

Transmitting problem on motorcycle


  • Make sure you run the CB directly to the battery. What you are hearing is the alternator whining. Even then sometimes a low pass filter may be necessary. Make sure the chassis of your CB is grounded with a copper braid strap too.

  • Hope this helps.

Apr 27, 2009 | Midland 75-822 40-Channels Handheld CB...

3 Answers

Hi, I was given a DX 33 HML as a gift from my best friend for helping him out. We are both o/o truckers, I can not get it to transmit very far or recieve while in motion(in my pick up) however while...


A) The DX33HML is a 10meter radio. this is true.
B) AS long as you place the HI/LO band switch in the high mode and the band knob (D/A E/B F/C) in the D/A mode you will only transmit on the (11meter band 26.965 thru 27.405 AKA the C.B. band) ch1 thru 40. You will not need a license. As of late the F.C.C. has not been messing with anyone on the lower or upper bands. BUT I AM NOT TELLING YOU TO DO SO. that is your choice to transmit on them.
C) as for an antenna I use the wilson 1000 magnet mount. The antenna will handle 1000 watts of power BUT on a magnet mount no more then 500 watts. BTW this kinda output power is not legal :( And you should find someone to check and/or set your SWR's on your antenna with any good swr metter. Any luck you will find someone with a Dosy metter.

Feb 28, 2009 | Galaxy Radios DX-33HML 40-Channels Base CB...

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