Question about Cobra 29 LTD CB Radio

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Swing kit for cobra 29 ltd bluetooth - Cobra 29 LTD CB Radio

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It wil be the same for any 40 channel cb.. lower the bias and it will give it more swing. we make our own. for a cobra there are only 2 components. unless you want it a variable... and they only cost a few dollars to make. variables are little more because of the transistor and needing a way to control it. if you dont use an existing knob on the radio.

Posted on Jan 03, 2011

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SOURCE: cobra 29 classic "swing kit" ?

A swing kit is nothing more then a Cap and a resistor. There really isn't a different way to do a swing kit, unless you do variable power, which you don't need unless you are going to run a linear, and even then you can just set the dead key with a swing kit.

you need a watt meter, preferably one that reads peak and average watts. If not, average will be find.

Open the bottom cover of the radio. Hook the radio up to the watt meter, use a dummy load or have it hooked to the antenna. Never key the radio with an antenna or a dummy load.

Find VR4. Its toward the back right of the radio. Turn it all the way to the left. That increases your modulation.

Next find L14. it is at the back in front of the final resistor. While making a steady sound into the radio, just make an ahhhhhhh noise. Back the slug out of the tank until the needle hits peak. Don't move it out any more or you will over bias the final.

Now you will need a 220 uf electrolytic cap, and a 100 ohm 1/2 watt resistor, both of which you can get from radio shack. (this is your swing kit.

To the right of the tank slug is a jumper maked JP36. Us soldering wick to remove the solder and pull out the jumper. Now put the cap in it with the stripe facing the back of the radio.(that is very important. the other way you will blow the radio.) Solder it in place and cut the extra leads off. Now on the back of the board were you soldered in the cap, solder the 100 ohm resistor in between the 2 points.

The amount of resistance determines you dead key. you will be at about a 2 watt dead key which is good for swing and if you want to run a linear. The higher the resistor the lower the dead key, and the lower the cap, the higher the dead key.

That is your basic peak and tune with a swing kit.


Posted on Dec 23, 2009

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1 Answer

Cant adjust swr on cobra 29 with swing kit


make sure you have no noise in the background at all the be my guest. you may have to put a cloth over the mic speaker to keep the noise level down but you can do it.

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Why is the swing on my cobra 29 ltd with bt swinging backwards with i talk


because when you tried to modify the radio for more power and audio you turned the wrong coil and can.

Aug 01, 2012 | Cobra 29 LTD CB Radio

1 Answer

I LIKE TO MAKE MY COBRA 29 HIGH POWER TALK A LONG WAYS HELP ME


Get a "swing kit" installed for about $20
Buy a power mic
Have the audio maxed out (simple turn of the VR4)
Have money to spend???
http://cbradio.auctivacommerce.com/IN-STOCK-EKL-POWER-BAND-RFX-75-P429725.aspx
Go there and for about $100 your Cobra will do 100 watts or a little more
"WILDCAT" IN LAURELVILLE OHIO
35 YEARS IN THE CB WORLD!!!

Dec 28, 2010 | Cobra 29 LTD CB Radio

1 Answer

HAVE A COBRA 29 LTD. MY SIGNAL IS WEAK WHEN I KEY UP AND I CAN"T RECEIVE A GOOD SIGNAL FROM OTHER CB RADIOS. DO I NEED TO HAVE IT PEAKED AND TUNE?


May be an antenna/coax issue. Turn the DYNAMIKE all the way up. Turn the RFGain all the way up. Turn the SQUELCH all the way to the left.
GET A "SWING KIT" INSTALLED!!!
"WILDCAT" IN LAURELVILLE OHIO
35 YEARS OF CB FUN!!!

Dec 08, 2010 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 modulation modification


did you make sure the caps stripe is facing the back of the radio? If not, its the wrong way.

Also, don't use a 1/4 watt resistor because it will get too hot for it to last. use 1/8th.

changing the cap size will not change output, however it will change the tone. Bigger the cap, the deeper the tone of audio.

to be honest with you, high output mods are worthless in these radios. they are fine with out them. mosfets are unstable and are very dirty transmit finals. As well if you are planning to use a linear you may hit it too hard unless its a high drive, in which case you will need more then 35 watts swing to drive it fully. A stock cobra 29 that has been peaked and tuned, then the swing mod put in, 220uf e cap and 100 ohm resistor, which should give you about 2 watts, should swing to about 27 watts, and kick an amp in the pants.

I run a cobra 29 in my blazer with a dave made 5 pill, and I key on 6 pills and I near keyed on a 2x8. very close. All that I have done to the radio is peak and tune, (of course I have a few tricks with that up my sleave which I don't usually share with just any one.) and variable power, wich will control the dead key, which is basically a varible swing kit. I run it just under 2 watts, just enoug to get a 125 watt dead key out of the amp. The amps swings over 920 watts.

any more swing from the radio will beat up the pills in the amp.

Jan 06, 2010 | Cobra 29 LTD CB Radio

1 Answer

Bought a new cobra 29, need antenna advice


Firestik Dual CB Antenna Kit This is a most popular dual antenna kit and one we HIGHLY recommend! It contains everything you need and features premium USA-made components from Firestik. The included FS CB antennas are our best-selling antennas and ensure you'll receive maximum transmit and receive performance. Designed for the elements, the stainless steel springs and mounts are rust- and weather-resistant. The included three-way mounts -- the most popular style we carry-- offer numerous mounting possibilities.

Dec 22, 2009 | 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

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