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Lights too bright ,can i use the delta tune knob as a dimmer or do i need other parts ?

Bought a 29 ltd black chrome cb,the lights are too bright... can i take the delta tune out and use that knob as a dimmer or will it short my cb out ? or do i need other parts ?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Dodgem250
  • 68 Answers

SOURCE: Cobra 29 LTD Classic Operations Manual

For the operation manual, go to cobraelec.com or:

http://cobra.com/downloads/manuals/29LTDCLA.PDF


Thanks!
Dodgem

http://dodgem250.angelfire.com

Posted on May 10, 2008

  • 773 Answers

SOURCE: cobra 29 ltd classic cb not transmitting

Check the ground. Make sure its grounded well on bare metal. To see if the ground is bad, or not making good connection, disconnect the antenna and turn it on. if it does not power up, that means your ground is bad, and it was grounding only through the antenna.

Make sure not to key up with out the antenna connected.

Posted on Feb 08, 2009

  • 773 Answers

SOURCE: cobra 29 ltd classic ant light

Your SWR is probably NOT fine. You need to use an external meter if you have had work done to the radio. Especially if you have had a swing mod done to the radio. When you do this, the dead key of the radio is lower then the calibration knob on the radio can adjust for. It will always come up lower then it actually is.

Your radio might have been fine before the work was done on it because it was putting out very little power. Now you are most likely putting out 50 watts or more. Big jump from 4 watts.

When your raise the power in a radio, you will notice more when the antenna is not properly tuned.

In most cases with a stock CB, even when the antenna is not even near tuned, you will get a reading less then 1.5 anyway.

the more power you put out, the more important it is to have a good match.

But an external SWR meter, and check it. be careful if the ANT light is on.

You might also want to check your coax, connections to it, and your antenna for anything wrong.

Posted on Apr 24, 2009

  • 773 Answers

SOURCE: I need Wire diagram for Cobra 29 LTD Classic CB

http://xbones_antennas.tripod.com/id21.html

Posted on May 03, 2009

  • 1274 Answers

SOURCE: Red RX/TX and red ANT light on my CB

Well,first hand ,some cobra radio,s have red some have green RX/TX lights, but are you modulating? Some green lights turn red. What is your standing Wave on the antenna,s? You need to check it and the output of the radio. To do this you need a watt or field strenth meter. Can get one at Radio Shack. Your standing Wave is ok as long as it is below a 2. That has to be done on the antenna. ..hope this helps...

Posted on Mar 12, 2010

Testimonial: "Thx the rx/tx light is supposed to turn red I found out. Still trying to get the antenna prob fixed though."

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1 Answer

I have a cobra 29 Ltd chrome what is the dynamite and the rfgain and the delta tune and the talk back used for. What do you set it on


The mic gain is your output audio volume or modulation. RF Gain is you reception sensitivity. Delta tune is a gimmick it is supposed to slide the frequency a few kHz up or down for you reception of a radio that might have drifted off channel. Talkback is a tool to give you an idea of what you sound like ie quality of mic or volume or adjusting echo if you have added such a board to your radio. As far as adjustments RF gain is preferance. Mic all the way up on stock radio. Delta tune 12 o'clock. Talkback user preference. Take care......hope this was of help

Jul 25, 2014 | Radio Communications

1 Answer

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


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

Jan 23, 2013 | Lands Phones

1 Answer

I dont think my talkback works on my cobra 29 ltd chrome. am i doing something wrong?


was it already installed or did you set it up ? If its a talk back that is an s.m.d. then it is usually controlled by the rf gain and the delta tune .Some will mount it to be controlled by the mic gain.Others try it out by attaching a resistor to the PA and external speaker plugs on the back of the radio. you may have to use a bigger resistor or even a smaller resistor to get it to work the way you want it to .

Apr 21, 2012 | Cobra 29 LTD CB Radio

1 Answer

I have expanded my 25 ltd and want a rx/tx fine tune possibly using the rf gain control?


look at a schematic of a 29ltd to do that.. the 25 does'nt have it in there easily.. the 29 can be fixed to change tx/rx freq. with the delta tune

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1 Answer

What its the proper way to set the knobs on this cb radio


volume is to your choice I have mine 3/4 open to get over the noise in my truck.My sq is all the way left,RF gain is all the way right. Mic gain is about half . I don't use the swr knob because I have it hooked up to an external meter . Delta tune is set to the point of the click on the knob . Thats how I have mine set and it works fine for me.

Dec 15, 2010 | Cobra 29 LTD CB Radio

1 Answer

Receive distortion


Try your tune knob and your clarifier knob.....hope this helps

Mar 12, 2010 | Cobra 29 LTD CB Radio

1 Answer

29 LTD classic recieve is way off frequency. recieve sounds like bleed over from another channel. how do i adjust the receive frquency for a cobra 29 ltd classic?


un fortunatly to properly align this radio you need an audio VTVM, occiliscope and a dummy load.

but before you get crazy with trying to align your radio, is the delta tune right in the middle? if not thats why recieve is off.... as well you can adjust delta tune to compensate for off frequency.

Jan 04, 2010 | Galaxy Radios DX-949 40-Channels Base CB...

1 Answer

Calibrate LTD 29Cobra classic


The misconception is that you can calibrate a radio. You do not calibrate the radio. You tune the antenna. The calibrate knob on the radio is to calibrate the meter in it so you can check the SWR.

This article will tell you everything you need to know.

Nov 04, 2009 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 issues


Check D23 and D28. They are polarity protection diodes. It could also be the power knob.

Nov 09, 2008 | Cobra 29 LTD CB Radio

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