20 Most Recent Cobra 19 DX IV CB Radio - Page 6 Questions & Answers

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Truck almost dies when mic is keyed

Hello stews78bronc,

First I want you to do one thing; disconnect the antenna cable and measure the resistance from the antenna connector center conductor of the cable to ground using the Rx1 setting on an Ohmmeter, you should have infinite resistance (no meter deflection). If you do have some deflection you have a shorted antenna and you have to have it replaced or repaired. There should be no connectivity of the center conductor to ground. This is what this problem sounds like. Don't key the mic with the antenna disconnected because this can damage the final stage RF power amplifier.

The antenna should be installed with a non-conductive washer between the antenna and the ground plane screw.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com
3/25/2009 2:26:39 AM • Cobra 19 DX IV... • Answered on Mar 25, 2009
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My radio is down...

First check the fuse if it is blown replace it.If the new fuse blows then you will have to replace a diode. which is located just inside of the radio where the power leads solder to the board.Replace the diode and that should fix your radio.
3/21/2009 3:50:48 AM • Cobra 19 DX IV... • Answered on Mar 21, 2009
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Receiving fine but transmitting bad??

First off, that radio will not transmit very well anyways.  but for just off roading it should suffice.  You really should adjust your antenna's both of you.  First off this is almost definitely the problem if you can recieve but not send.  Also if you use the radio without a properly adjusted antenna it will destroy the radio over time, sometimes instantly.  pick up a cheap SWR meter and follow these steps: Plug the SWR meter into the radio, and the antenna. Start on channel 1, the meter should have a switch with 2 settings, one for adjustments and one for reading.  Key up (hold down talk button on mic) with the switch in adjust mode and adjust the knob until it reaches the adjustment marker. flip the switch to reading and key up again. Your goal is to get this reading as close to 1.1 as possible, anything above a 2.0 will damage your radio. if the reading is within range repeat for channels 20 and 40. good luck!
3/20/2009 5:27:39 PM • Cobra 19 DX IV... • Answered on Mar 20, 2009
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Cobra radios

http://www.hardtimez99.com/CB%20RADIO%20SECRET/menu.html If you have a good watt/modulation meter and some alignment tools...here some basic mods ...scroll down the page and click on the C in the alphabet for cobra models..
3/18/2009 2:31:09 AM • Cobra 19 DX IV... • Answered on Mar 18, 2009
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Can a digital volt meter be used to estimate swr?

No, Well. not easily that I am aware of. besides the other function of the SWR meter is to measure RF power.

Plus, the Meters are Cheap. it's not worth the bother.
1/30/2009 2:07:15 AM • Cobra 19 DX IV... • Answered on Jan 30, 2009
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2answers

Static and Recieving Problem

make sure people are talking on the channel it may be no one is talking . the static tells you it is receiving something. the cobra 19 and sister radio magnum sold at wallyworld are notorious for having bad solder joints on their boards.
1/18/2009 6:22:13 PM • Cobra 19 DX IV... • Answered on Jan 18, 2009
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Turning it up

Make sure your antenna is hooked up properly.Find a friend who has a cb radio and see if you are getting out on your radio to him if not get repair center to check the finals or micaphone
12/26/2008 2:45:00 AM • Cobra 19 DX IV... • Answered on Dec 26, 2008
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Coax ends

Hello kewball,

You can buy the PL-259 connector at radio shack (Here is a link to the instruction on how to put a PL-259 connector back on):
http://www.stu-offroad.com/misc/rfconn.htm

I hope this helps

Thank you,

Shuttle83

11/4/2008 11:36:43 PM • Cobra 19 DX IV... • Answered on Nov 04, 2008
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Need more power

cbtricks.com
9/15/2008 12:44:49 AM • Cobra 19 DX IV... • Answered on Sep 15, 2008
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Cobra 19 DX IV CB Radio Gets no signal at all

my only idea is the frequency that Canadians transmit/recieve on is different than us down south (in the USA). I know Europe and the UK use a different frequency range so my guess is that Canada uses a different radio frequency range than the U.S. making you unable to communicate with fellow radio users. You may be able to search the frequency range for Canada vs. the U.S. and see if there's a difference. Hope this helps...and again, it's just a thought.
Montana, USA
7/17/2008 5:36:29 AM • Cobra 19 DX IV... • Answered on Jul 17, 2008
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Cobra 19 DX IV

No, those radios are good radios. I have one just for setting swrs on antennas.

First, I went back and read your last question. You said you have a nylon washer on top AND bottom? Did you mean one under on the top and bottom side of the antenna mount? You only need theone on the top of the antenna mount, which stops the antenna itself from being grounded out. Having one on the underside stops the outter part of the stud, the one that touches the outer screw on part of the coax from being grounded. Without that getting a good ground, you have no groundplane, which will cut your tx/rx to a max of 2 miles. Also, how close is the two setups. Many times, if two vehicles are setting next to each other, you will not receive or transmit properly, just get a nasty garbled with a hint of a squeal.

If this doesn't help, please reply here or shoot me an email at:

[email protected]

Dean Pitts
Rollin CBs
Mt. Vernon, TX
5/22/2008 5:04:04 PM • Cobra 19 DX IV... • Answered on May 22, 2008
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CB transmission

Hello 64driver,

Make sure the radio is grounded properly and that the SWR is around 1.2:1, 1.3:1 is good but try to get it to 1.2:1. Also take a power output reading while keying the mic. To do this with your power meter put it in-line with the CB and your antenna and key the mic you should get about 4 to 5 watts PEP. If this is the case your unit is putting out the proper power level, if not have the power amplifier checked by a qualified repair shop.

I hope this helps

Shuttle83
5/14/2008 12:42:57 AM • Cobra 19 DX IV... • Answered on May 14, 2008
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Cobra 19 dx lv

Sounds as though you may have a poor or bad antennas system. I would suggest to check the antenna match ( SWR, Standing Wave Ratio) and if it's good, you might think about a better antenna. Good Luck
Ed
NC Electronic
Mills, Wyoming
5/13/2008 8:36:51 PM • Cobra 19 DX IV... • Answered on May 13, 2008
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My send is fuzzy and hard to understand. I recieve just fine

Perhaps you need to check your SWR? See the following link: http://www.transmission1.co.uk/modules.php?op=modload&name=News&file=article&sid=11
12/17/2007 3:53:50 AM • Cobra 19 DX IV... • Answered on Dec 17, 2007
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How do I do a tune up to get more watts and modulation on a Cobra 148 gtl?

Replace the power output section with a higher power device.
10/6/2021 5:40:34 PM • Cobra Radio... • Answered on Oct 06, 2021
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Cobra 146 gtl am/ ssb cb radio transmit frequency on lsb is 2/10ths of a kc off how can i correct/adjust the frequency to get it back on correct frequency ?

You cannot. You need an appropriate FCC licence to make any adjustments to the transmitter.
10/2/2021 4:55:25 AM • Cobra Radio... • Answered on Oct 02, 2021
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Have new Cobra 29 LTD Classic cannot get any Squelch sound no sound r any on going talk on any channel

Make sure it is not on PA, if there is absolutely not a setting issue, then the unit is new you need to take it or send it back.
9/10/2021 8:48:57 PM • Cobra Radio... • Answered on Sep 10, 2021
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I want to wore my shure desk mike to my cobra 29 ltd

You will need to rewire a plug to fit to do that and it will be OK if there is no background noise.
7/12/2021 7:25:40 AM • Cobra Radio... • Answered on Jul 12, 2021
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