Question about Cobra 19 Ultra II CB Radio

2 Answers

How do i turn peak and tune my cobra 19 ultra 3 myself no cb shop close by

Posted by johnnym_8620 on


2 Answers

Don Reiman

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 773 Answers

Un-solder 1 leg of D11 diode, pull it out of the board, and make sure it does not short against anything.

That will bring your modulation up all the way. there are other adjustments that can be done, but without proper meters, you will most likely mess up the radio.

D11 will be a big step up any way.

Posted on Oct 03, 2009



  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 86 Answers

I am not up todate on the Ultra II but most 19
are almost the same,on the Plus model adj.
RV501 some will have RV4 they are for
modulation,the plain 19 adj.VR501 the Classic
is VR4 so you see how much alike they are
100% modulation is all you can do to be in the
limit but I have seen 125% to150% out of some
Maybe this will get you started,

Posted on Sep 09, 2009

  • Anonymous Sep 15, 2009

    Try VR501 or RV4 to adj. modulation

    Maybe this will help.

  • Anonymous Sep 17, 2009

    My schematic go back to far,Iwill dive you one

    on a 19 ultra maybe thay are close to the sane

    for Modulaiion RV501 or cut D502

    for AM power L306 an L305.Maybe this wlll

    help,good luck



Add Your Answer


Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Cobra 18 wx st. peak and tune.

the only thing you can do is turn up the mod vari and thats it.

May 22, 2014 | Cobra 19 Ultra II CB Radio

2 Answers

How do i peak and tune a cobra 29 lx

pay and get it done right so the radio does not get destroyed.

Dec 06, 2012 | Cobra 29 Lx Full-featured Cb Radio

1 Answer

How to peak and tune Cobra 19 DX IV

L 5 , L 6 , L 801 for power and RV2 for modulation.

Feb 07, 2012 | Cobra 19 DX IV CB Radio

1 Answer

What mods can i do to my cobra 19?

tune up, swing mod, talkback, any thing that can be done to a cobra 25 ltd can be done to any 40ch cb.. just add a power mic$17.99 or a good echo mic will make a huge difference.

Feb 07, 2011 | Cobra 19 Ultra II CB Radio

1 Answer

I need more transmission range for free

A lot of people will say that you need to peak and tune the radio to get more range. And it will, but what it really comes down to is your antenna system.

Even with the best peak and tune, if you don't have a good antenna system, it won't do you any good.

You need to make sure the antenna is a good match. If you don't know what that means, then you should refer to your manual on SWR. The antenna has to be tuned so that transmit power does not get reflected back into the radio. If that is happening, all of the RF power is not leaving the antenna, and you are not getting out as good as you can.

Once you have a good antenna system, then you can worry about peak and tuning. But for a peak and tune, I charge.

Sep 04, 2010 | Cobra 19 Ultra II CB Radio

1 Answer

I want to know how to tune my cobra 19 3 ultra cb so that i can recieve and transmit

you can't tune the radio. You must tune the antenna. I have a generic thread which explains everything you need to know about tuning your antenna.
See here. Hope this helps you.

Aug 22, 2010 | Cobra 19 Ultra II CB Radio

2 Answers

How to modify a cobra 19 ultra iii cb

i got a couple of them and i have them talking really good for what they are. if you go inside you can turn up the pods also you can take a small screwdriver and spread those coils inside near the back of cb!

May 11, 2010 | Cobra 19 Ultra II CB Radio

1 Answer

I can not get out on my cb i can hear them but they can not hear me its a cobra

turn the mic gain all the way up. Make sure the antenna has been tuned for best SWR.

Take your radio to a CB shop and have them peak and tune it.

Mar 29, 2010 | Cobra 19 Ultra II CB Radio

1 Answer

How to increse the watts?

Take your radio to a CB Shop and have them 'tune it up' or 'peak' it. It is usually a modest fee and will improve the transmit range of the radio. There are usually shops near truck stops, just ask around on channel 19 in the area if there is a shop nearby.

Some radios do better than others, there may not be a great improvement on your particular radio.

Feb 06, 2010 | Cobra 148 GTL 120-Channels Base CB Radio

Not finding what you are looking for?
Radio Communications Logo

Related Topics:

6,531 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cobra Radio Communications Experts

Brad Brown

Level 3 Expert

18438 Answers

Michael Thomas
Michael Thomas

Level 3 Expert

3053 Answers


Level 3 Expert

85239 Answers

Are you a Cobra Radio Communication Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides