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What is a voic box on a cobra 29 ltd? What is a good antt combo four a 29 ltd?

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Cobra's LTD 29 model Citizen's Band radio features the full 40 channels allowed and a heavy-duty microphone. The radio provides 4 watts of AM radio frequency output with a switchable automatic noise limiter and noise blanker. Other features include Cobra's Delta-Tune function. Making a Cobra LTD 29 hear and receive better involves making changes to the radio's settings, including the settings specific to this brand.
M/F Turn the switch labeled "NB/ANL, ANL, OFF" to the "ANL" position and try the transmission again if noise is affecting reception. "ANL" is an automatic noise limiter function and reduces noise caused by the vehicle's electrical systems and electronics.

M/F Switch to "NB/ANL" to activate the noise blanker, which may also reduce noise if you continue to have problems. It's an RF noise filtration function and will help with ignition noise.

M/F Adjust the "RF Gain" knob by turning it clockwise to increase gain in weak signal areas if you have problems hearing radio traffic.

M/F Set the "Delta-Tune" function to capture a more listenable signal and get rid of adjacent channel noise. Rotate the knob labeled "Deltatune" to the center position for best tuning. Try micro-adjustments to the left or right as well.

M/F Turn the volume up if you still can't hear and as with any CB radio, adjust the squelch if the radio is noisy when there's no traffic. Turn the knob labeled "Squelch" all the way to the left to receive all signals, including noise and turn the control clockwise until the background noise stops. You will be able to hear the strongest transmissions without having to listen to weak signals and noise.
The service manual can be found here

Posted on Jan 24, 2013

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1 Answer

I have a cobra 29 ltd . When I talke the ant light come on. I have a good ground


Either you have a bad antenna or voice box has went out. Hope this helps.

Jan 23, 2013 | Video Game Consoles & Games

1 Answer

When do you know if you have a decent radio


The 29 has a built in SWR meter--check the match to make sure it is below 2 (lower the better).

The radio can be peaked for better than factory audio.

If the squelch is up too high you will not hear people below a certain signal level---in your case set it so you hear who you want to and not jokers.

RF gain lowers signal the radio sees for receive.

The stock mic will work but make your voice somewhat flat sounding---a power mic or having the mod limiter removed will make the radio and your voice louder.

Let me know if questions.

Jun 10, 2012 | Cobra 29 LTD CB Radio

1 Answer

I disconnected and reconnected the cobra 29 nw ltd classic and now my voice is heard very low and slow it was working fine just before disconnection. can you help


How did you disconnect it?? Antenna wire?? Power supply?? Microphone?? May be that you have a short in your coax in back of radio. Try taking it loose and screw it back in. Try new coax. Turn up Mic gain knob or change microphone. Make sure power wires are connected RED to RED(+) and Black to Black(-). Try grounding radio to metal ; if inside house ground to metal water pipes, filing cabinet, breaker box or meter box or 8 foot rod into earth. Measure SWR it should read 1.1 to 1.5. Measure power supply with Voltmeter it should be 12 to 15 volts. Check antenna plug in back of radio is my guess or microphone itself.

May 09, 2011 | Cobra 29 LTD CB Radio

1 Answer

When I speak on my cobra 29 nw, I can here my voice on my stereo radio speakers. Any ideas what causes this?


too much power or you are overmodulating.....i.e. power nmic ? ?
If you place a .05mfd cap across yoy're speaker terms.they will help that problem also...Good luck ! !

Oct 03, 2010 | Cobra 29 LTD CB Radio

1 Answer

When the mike is keyed to TR my audio comes thru the speaker. Cobra 29 LTD Classic. Best Regards Jim


If your voice is coming through the speaker when you transmit, it means you have talkback installed. If you don't like it, take it to a reputable CB shop and ask them to remove it.

Aug 06, 2010 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 LTD Bluetooth


You got your radio peaked? Most likely, however, the pot for the antenna warning indicator is VR6. I always check that after peaking a radio.

Jul 28, 2009 | Cobra 29 LTD CB Radio

1 Answer

I have a cobra 29 nw ltd classic i cannot hear or be heared


Start with the antenna that you have hooked to it, is it grounded, is the coax in good shape, is the connector in good shape. stuff like that.

Jun 14, 2009 | Cobra 29 LTD CB Radio

1 Answer

I don't have voice, have carrier. Cobra 29 ltd


there are several things that might be responsible for the absence of modulation when speaking into the microphone. a defective mic cartridge, a broken audio or audio shield/ground wire in the mic cable or mic plug or a defective push-to-talk switch in the mic itself, for starters. if all is well here then the amc and transmitter speech stages in the transceiver will have to be considered next. locate and check with a known good mic wired for the radio in question. let me know.

Jun 06, 2009 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 ltd


It sounds like the afc or IF pot is mistuned, May be the tech that did the super mod didn't adjust it completely correct.
Good Luck
Ed Meshechek ( Radio Man )
NC Electronics
PO Box 1696
414 6th St
Mills, Wyoming
82644
307-266-4675
wyoed1@aol.com

Nov 28, 2008 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 Ltd


Hi,

Appreciate the direct "Ask Me" again.

The initial posting would still hold true, best would be:
  • remove TR18;
  • replace 2SC2069 with 2SC1969; and
  • adjust L12, 13 & 14.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Sep 07, 2008 | Cobra 29 LTD CB Radio

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