Question about Radio Communications
Www.cbtricks.com has a parts list if thats what you are looking for.
Posted on Jun 05, 2014
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Posted on Jan 02, 2017
SOURCE: Cobra 1000 GTL by Dynascan
This is a complicated modification. I have never done it to a 1000 GTL, but its done basically the same in all radio's.
I don't recommend doing it, especially since I am not 100% sure on how exactly to do it. I have never been in a 1000 gtl. If I had one in front of me I could tell you for sure how to do it.
If the reason for Variable power is a linear, just a swing kit in for the dead key you need, most likely 2 watts, and leave it.
Here is how to do a variable power mod. this is assuming the swing mod is done the same to this as a cobra 25/29 or uniden 68/76 etc.
If you would like to try it, here it is.
You get a TIP31 transistor, Radioshack has them.
Where you put the swing mod in the radio, which is a cap and a resistor, you put the TIP31 and cap. A 47uf cap works fine.
With the resistor facing you, and the tab in the back away, solder the cap to the transistor. the leg with the black stripe goes on the right most leg. then the other goes to the center leg of the transistor.
Solder a wire on the left most leg, long enough to reach the front of the radio. Now solder the 2 legs that don't have the wire on it, in the place where you would put the swing kit, with the black stripe on the cap facing the back of the radio usually.
Remove the wires from the RF gain and solder them together.
Now solder the wire from the transistor to the center tab.
Remove VR6 and solder a wire from the top tag of the RF gain to the top connection of VR6 that you removed.
Then connect a wire from the bottom tag to a ground point. The side of a tuning can works fine.
Take a piece of shrink tube and put it over the TIP31 so it does not ground against the heat sink, that would be bad.
This is done basically the same in all cb radio's.
Posted on May 03, 2009
you can write to parts department requesting price if you have a truck stop around you which has a cb shop they can sell u one
Posted on Jun 26, 2009
SOURCE: tunring up a cobra 150 gtl/dx
Um... What?? This is hooked to a switch? CB radio by FCC regulations is only supposed to have a max of 4 watts total output. If you can flip it to 7 watts dead key, you are doing really good. It won't do much more then that. It sounds like its set up to run on a linear amplifier, which cannot have more then 3 watts dead key transmitting into it.
Dead key, and modulation are different. You may have a meter that only reads dead key, and won't see the modulation. This radio is probably swinging close to 15-20 watts. you need a meter that can read PEP, Peak envelope power. Cheap meters only read AVG, or average power, witch will only show your dead key.
7 watts dead key is really good for that radio.especially since stock only has 4 watts. you cannot get any higher then that without changing finals.
at 3 watt dead key, or 7 watt dead key, your modulation wattage is still swinging much higher.
Also, you will get more swing with a lower dead key any way, which is better if you want it to be loud.
Leave it alone. its probably set just right.
Posted on Oct 03, 2009
I have a brand new cobra 29 LTD Classic with a cheap $12 antenna and when i talk to people all they here is a squeal unless i put my hand on top of the cb and it stops squealing? I can here everyone else fine, but they here a squeal what could be the problem
Posted on Jul 23, 2010
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