Question about Cobra 18 WX ST 40-Channels Base CB Radio

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Cobra 20 Plus CB radio

I have an older cobra 20 plus that I installed in my pickup this past weekend and when I turn it on it just scrolls through the channels at will and wont stop. I can press the volume button and it goes to ch 9 (and stops) but starts scrolling again when I press the volume button again. Saturday when I hooked it up it seemed to work ok. Sunday when I went to try a radio check it starts to scroll uncontrollably. What gives?
Jeff

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  • lars ahlsen May 11, 2010

    Hello...can you please tell me if you have up-dwn function on your mike...or on your ...radio is possible that a button is locked....Ron

  • cimahiduatig
    cimahiduatig Dec 25, 2012

    I have cobra radio 20 plus.but a PTT button it wont work, signal display doesnt exist, frequency stay at 9 channel, a sound its so small.how to know a radio is normal and I can use it or its a junk?thanks

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Mines stuck on PR any ideas ?

Posted on Nov 21, 2015

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Make sure you have a good ground.


Posted on Jan 01, 2009

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Facts about Cb radio.


a Cb(Citizens Band) radio usually only broadcast on frequencies 26.965 to 27.405 megahertz. It is for mostly short range use 3 to 20 miles range. It comes with legal power of 4 watts. Ranges average about 5 miles. Don't expect big results off this little low-power Am transmitter. A basic 40 channel radio, Microphone, and "Magnet Mount" antenna plus 12 volt Dc 5A power supply will suffice. Place the Magnet mount on a metal file cabinet inside your house. hook up the Radio Shack 12 volt 3-5 Amp power supply to your 40 channel radio, Say Uniden pro510xl or Cobra 19 plus mini compact about $39 for these types. A $20 Radio Shack magnet mount. Turn on radio an talk. If you live in the city near lots of friends who have one too. You can talk on a private channel like Ch#40 and talk all night. The waves get quieter at night and extend farther into the Ionesphere;conditions are favorable 8pm to 12am. You should talk loudly within 5-7 miles easy. I like friends nearby; who live within 3 miles of me. Don't expect Long Distance with these radios. Unless you buy a big 1000 Watt Rf Linear an Tower 100 ft. with big Antennas costing $10,000. But remember the FCC will knock on your door and may give you 5 years $10,000 fines for anything of Linear amps 1000Watts. Just stick with basic tune and adjust,power mics(Cobra sells best). Talk with friends about fishing,hunting,gardens,tools,cars,women etc. Have Fun!!!

on Apr 02, 2011 | Cobra 29 LTD CB Radio

1 Answer

The wiring came off and don't know howe they go by color it'got5 places to salder wires are r/b/or/b


If your asking about a Cobra radio then these links will have the pin-outs plus wiring color code for different mic's.
I had to guess what you was asking for as your question was kinda vague. And a Cobra 29 is a 4 pin mike, not 5 pin.
The 148 - 142 were 5 pin. I'll include it also.
http://www.cbtricks.com/radios/cobra/148gtl/index.htm Cobra 29LTD ST 29WX ST

Aug 13, 2015 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 plus serial number 63012016 manual free


go to www.cbtricks.com and download any manual you need.If you can't find do a google search.

Sep 10, 2014 | Cobra S.o.s. 39 Plus 2-way Cb 12v Mobile...

1 Answer

Looking for manual


get hold of cobra and see if they have what you need.

Oct 15, 2013 | Cobra Vintage 40 Ch 2-way Cb Mobile Radio...

1 Answer

Finals for Cobra 19DX IV...where can i buy them?


cost of finals plus S&H plus labor. cheaper to buy a new one and have that one for parts. H&Y electronics has them but you have to call them to make sure they do.

Aug 22, 2013 | Cobra 19dx Iv Eu Multiband Am Fm Cb Radio...

1 Answer

When I hook up my cobra 20 plus it won't change off channel 9 . Why not?


it may have a channel nine switch or button on the front that locks it there.

Dec 14, 2012 | Cobra 20plus Cb Radio W/ Microphone Power...

2 Answers

Want to disconnect the bleep altogether on my cobra 148 gtldx


If this is a stock cobra 148 gtl 40 channel am plus side band, they don't to my knowledge come with a built in r beep. Some roger beeps are instaleed through the transmit circuit on the mic, so if not in the know Don't try to fix it.Some microphones have a beep built in. I used to install beeps on these radios using the pa/cb switch to turn them on. also try the nb switch or the swr/rf switch.

Feb 04, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

Old dynamike plus wiring for a super star 3900


1-Shield
2-White
3-Red
4-Black
Check the mike plug to make sure that none of the wires have broke off.I would also check the mike cable with an ohm meter.

Jan 02, 2009 | Cobra 148 GTL 120-Channels Base CB Radio

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