Guide :Radio Communications : 148 GTL 120-Channels Base CB Radio

No power radio meter light comes on but no tx or channel lights and there is no sound if you tap the back side it will sometimes power up

Posted by kenneth gros on Jul 20, 2007

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Suggested Questions And Answer :


No power radio meter light comes on but no tx or channel lights and there is no sound if you tap the back side it will sometimes power up


Ken_e_g Please Contact me Online for a Fix for your Problem,I will guide you threw the Process,Im live Now ttech
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I have a cobra 200 gtl dx and some one make modification on it to get more power and more modulation but i see in my books the modification to raise up on the board in front of my cb tell me to raise up one ressistance just in one side left side but when i go to raise the ressitance i see is missing 2 ressistance the guys you did that i dont know im because i buy it like that the probleme is i d'ont know the #number of this 2 ressitance because i whant to put it back in the redio and do it like the book tell me to do it the right way but i dont have the ressitance number could you help me with that please because my modulation on my cb is not good i think is the 2 missing ressitanse do that please help me Bert thanks in advance


You do not do it by resistance. To turn up the radio it is a variable resistor. What you do is connect a watt meter that can read PEAK or PEP watts AND AVERAGE or dead key watts.First you check it on avg watts. Hook the radio up in line with the watt meter and set it on avg watts. key the radio. Stock is 4 watts. A lot of times when you peak a radio, you lower the dead key.(thats keying with no audio.) This allows you to get more modulation wattage, or swing wattage. If that has been done it will probably do 2 or 3 watts. If it has had the AM power raised in it, it could be more, this is no good. You want your dead key a bit lower.Now check it on peak. Flip the meter to peak and make an AHHHHHHHHHHHHHHH noise into the radio. It should swing to anywhere between 15 and 20 watts.You adjust the AMC while giving it audio and watching the meter on peak to adjust the modulation. 4 watts is legal modulation.
Read More At : 200 GTL DX 4-Channels Base CB Radio...

The variabel key drops sometimes drops when radio is keyed up and sometime the RF power knob has to be turned farther to bring it back up on my Galaxy DX959.


I'm not shure if you have tried but turn the mic gain down then check the d.k output. If you still lose power after a d.k it could be a final it's hard to say w/o seeing it. Also an external meter is more stable than the internal one. Check your coax, make shure all are tight. If you need more help e-mail me [email protected]. no capital'sGood luck
Read More At : DX-959 40-Channels Base CB Radio...

On rx , i have a low carrier , sometimes cannot hear someone vs another radio


Depends on how it was modded? Were both the TX and RX broadbanded and tetuned?? Possibly poor work..
Read More At : 148 GTL 120-Channels Base CB Radio...

Cobra gtl 148 seems to have no power til i push on mic connecter.


Cobra 148 shows no wattage output on external meter but does show good modulation.
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Can not recieve properly


IN your CB there are 25 tuneing slugs (square matal cans with ferrite tuneing slugs) if you speaker output is low leavel but still clear and free of hash the set should be ok , but you will need to tune these slugs with a small jewlers screw driver (WITH GREAT CARE) as the slugs break easy. If you want to email me it will not be a problem ,cheers , DENNIS [email protected]
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148gtl, Taiwan when you modulate the meter swings backwards


In the back is where power mods have been added...It sounds like a swing kit 1/2 watt deadkey to 25 watts which is a powerful modulation exceeding 100%. Its a 220uf capacitor in place of a jumper J1 or J(x) J something in some radios. if you replace the jumper and remove the capacitor 220uf or 470uf one.(near finals it will return to around 4 watt dead key) The result of 4 watts is modulation is flat;where if you adjust it to 2 1/4 watt to say 20 watts it will be very loud and modulation is at 100%.
Read More At : 148 GTL 120-Channels Base CB Radio...

No transmit or recive but works on pa mode


Does this radio have freq? if so you could have turned on causing a miss alignment with antena.. check all the switches move into different positions and keep keying up, good antena connection? swr? tony
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When I turn the dx 959 and power back up again, the frequency meter shows 10.695 or 00.000. Sometimes, a slap to the box willcorrect this, but sometimes not. The radio neither receives or transmits while in this condition. What is causing this?


Hi, my name is John. Welcome to FixYa.Take the cover off, power it back-up, then with a pencil eraser end, mash around on the circuit board, looking for cold solder joints and re-solder them with soldering iron. This should solve the problem for you. Thanks for choosing FixYa....John
Read More At : DX-959 40-Channels Base CB Radio...

Hello, I dusted off my old Cobra 2000 GTL and plugged it into the wall and it will not power on. The clock is on and adjustable. It was last working before I boxed it up a few years back. Is this a known problem? Power switch? Please advise. Robin


Try this, plug it all up and turn it on, let it set over night, then try it, after a radio has been put away for a while, the capacitors lose charge...hope this was helpful....
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