iFixit - Answers With Device "CB Radio"

CB Radio: President Grant AM SSB needs help.

Sat, 10 Jan 2026 00:24:28 -0700

I have a President Grant 40 channel. AM SSB. It appears to be recieving as it sounds like it when antenna is connected. It has a external VFO. Antenna is nice at 27mhz. Its new to me and I havent had the back of yet. Questions.

What exactly is my VFO for?

My signal strength needle does not seem to work,does not move much?

My select switch could be bad as I have LSB but it is dead quiet on AM and USB

The radio come with a small kenwood mic, which did not work, another new CB mike I had here seems to work. The light comes on when triggered. The VFO has an on off switch, do you think I will ever use it? When it triggers the signal meter shows a small movement.

The signal meter rises up with modulation when I key the mic and speak.

⟐ Edited by author January 10, 2026 at 0:24 MST

CB Radio: CB neither receiving or transmitting

Tue, 19 Nov 2024 12:21:44 -0700

I have a Cobra Ultra Mini AM/FM. The power turns on and displays function. I have a Viper mobile antenna connected by 15 feet of cable. The SWR meter, Sure Com, shows no SWR reading and while the radio powers on, there's no reception or broadcasting. What am I doing wrong?

Cobra 29 LTD Classic: Why am I getting no sound

Thu, 08 Aug 2024 20:52:06 -0700

Everything works as it should but I am getting zeroes down

CB Radio: CB flicks rapidly between RX and TX when I key the mic with linear tur

Mon, 29 Nov 2021 13:31:19 -0700

My cb works just fine until I turn on my linear then when I key up it flicks rapidly back and forth between RX and TX. If I hold the mic close to the radio it stops. Any idea what might be causing this problem?

CB Radio: Cobra 29 LX Max T Back disabled all audio, also can't transmit.

Mon, 31 May 2021 13:20:24 -0700

I have a lightly used Cobra 29 LX Max, that I bought from my brother which he bought new and only used it a few times. I installed it in my Jeep and it worked great for about a month. Now it’s acting really strange. When I had T Back switched off, all audio turns off, even the weather channel is quiet. I see the Receive indicator on the LCD lighting up, but can’t hear anything. I switch T Back back on, even at the lowest volume, and all my audio volume comes back on.

Also, when I key down the mic, the meter swings over but doesn’t move when I talk into it. No one can hear me, and also T Back doesn’t repeat anything I say. They can hear me key down over the air, just no voice comes through.

I’ve calibrated my antenna, also switched to another magnet that was also calibrated. They both do the same thing. I did make sure the test antenna was on the body of my Jeep for ground. I’ve opened the CB but down see anything obvious. No burns, no mud, no loose wires. I’m not afraid of soldering, just looking to some people with experience before I start anything crazy. Any help would be greatly appreciated.

⟐ Commented May 31, 2021 at 13:20 MST

CB Radio: connect a different Mike to my superstar 4900b but it blows out

Mon, 05 Apr 2021 06:47:46 -0700

I try to connect a different Mike to my superstar 4900b but it blows out my keying out. Is there anybody you know can give me advice about how to fix it

⟐ Edited April 05, 2021 at 6:47 MST

Cobra 29 LTD Classic: Won't calibrate the radio to antennae, gauge won't reach the mark

Thu, 01 Oct 2020 20:42:08 -0700

When I try to calibrate it it makes it about 3/4 over to the mark, but won't make it all the way. Does anyone have any ideas?

It was neither SWR or modulation I was just calibrating the radio to the antenna.

⟐ Edited by author October 01, 2020 at 20:42 MST

CB Radio: No pa .. power good .. needle swings and changed mic .. any suggestio?

Sun, 22 Mar 2020 05:48:32 -0700

My CB PA is not working? Why?

CB Radio: Cobra 75 ws xt

Sat, 09 Mar 2019 06:14:57 -0700

I have power but nothing shows on the screen.

CB Radio: Radio repair on CB Radios

Tue, 02 Oct 2018 08:52:14 -0700

How do you install a bb2 radio echo board on a galaxy 959 cb radio?

Kenwood TM-241a: Help with disa activation code?

Mon, 18 Jun 2018 11:19:19 -0700

It is model WS1010 Radio Scanner and Serial number is 0038275 and DISA number is 1004030777. My mom buys a bunch of random stuff around christmas time and gives them out as gifts to random people. Usually stuff on sale or clearance. This was left over from our last christmas and I asked for it. There is no receipt and I already tried get your code but that says there was no sale record. I sincerely doubt my mother is a thief. Is there a way to get the 6 digit activation pin?

⟐ Reopened June 18, 2018 at 11:19 MST

Kenwood TM-241a: Bypass DISA activation code?

Mon, 18 Jun 2018 11:19:18 -0700

My mom buys a bunch of random stuff around christmas time and gives them out as gifts to random people. Usually stuff on sale or clearance. This was left over from our last christmas and I asked for it. There is no receipt and I already tried get your code but that says there was no sale record. I sincerely doubt my mother is a thief. Is there a way to get the 6 digit activation pin? It is model WS1010 Radio Scanner and Serial number is 0038275 and DISA number is 1004030777.

⟐ Reopened June 18, 2018 at 11:19 MST

CB Radio: No power radio won't turn on

Tue, 14 Nov 2017 21:51:35 -0700

I have the midland cb transceiver and just stopped working and I can't turn it on anymore and is the a replacement for it 75-822

⟐ Commented November 14, 2017 at 21:51 MST

CB Radio: no transmit.it wont key.up...

Fri, 18 Aug 2017 14:50:09 -0700

I JUST STRIPPED 2 PODS...NOW MY BRAND NEW ROADKING CB RADIO WONT KEY-UP AND TRANSMIT....HOW WILL IT COST TO FIX IT.....AND COULD YOU TURN UP THE TRASMIT WATTAGE AND THE RECIEVE....AS THIER BOTH VERY WEAK.....THANK-YOU-MIKE.M......ALSO HERES MY E-MAIL ADDRESS.[tiger50@gmx.us].........

CB Radio: Beeping when keying the mike

Wed, 12 Jul 2017 07:43:14 -0700

Every time I key the mike, it beeps. One long beep until I release the button. I can't talk

CB Radio: no power to conex, 3300

Sun, 25 Jun 2017 15:47:23 -0700

It has just lost it power changed power cords but still will not power no and I'm stumped and sy (

⟐ Comment deleted June 25, 2017 at 15:47 MST

CB Radio: Can't move off channel 23.

Wed, 11 May 2016 07:18:21 -0700

CB radio is stuck on Channel 23. Won't change channels

⟐ Commented May 11, 2016 at 7:18 MST

CB Radio: gyenge a gain control agc

Fri, 20 Nov 2015 01:58:32 -0700

gyenge az érzékenysége a készüléknek

Model: president jackson silver model

⟐ Answer unaccepted November 20, 2015 at 1:58 MST

Cobra 29 LTD Classic: machine screws for covers

Mon, 22 Jun 2015 08:13:42 -0700

what is the correct size on the little machine screws that fasten the cover on cobra radio covers