Question about Galaxy Radios DX-66V Base CB Radio

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I have a Northstar NS3000 10 meter radio and I can't figure out how the talk back mod was added. I want to install an on/off or at least disable it all together. Any ideas?

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Look on the bottom of th board near the audio chip you will see a resistor or a resistor and Capacitor combination just laying on the board tack soldered to it. Heat and lift one end turn the radio back on and see if the talk back is gone. If so install your switch there.

Posted on Sep 12, 2010

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Midland 9001Z How To Add Talk Back Mod


great radio but I own one and never again will I get one . To add talk back you must take off the top cover,solder a 33 ohm resistor across the pa and the external speaker outputs. If it doesn't work then try another resistor but this is the way to do it . If you want it on a variable then you attach two wires from each side of the resistor to a switch and you have it. I'm trying to get rid of mine but nobody wants to buy it.cheap.

Feb 20, 2014 | Midland Radio Guardian CB Radio, Model...

1 Answer

Uniden grannt xl will not transmit


I can tell you that mic wires can simulate that problem when they accidently touch or ground out. Sometimes a ground is loose or capacitor leaks. Check standing wave ratio. SWR 1.5 or less prefer 1.2 or 1.3 read. Antenna cables replacement and new ends. Dirt in mic switch. Mine did this with a power mod capacitor
near final(without proper discharge 100 ohm resistor). I turned back power to 1 1/2 watts to 4 swing a Tx tuning slug *redpaint on it. I let it talk on low key an when i speak it jumps to 4 or 5 watts on meter. When a mod has been done some people don't know that capacitors discharge and it will leak back current. Thats why on a Cobra/Uniden company radio the instruction properly call for a 100 ohm resistor to be placed in parallel with Capacitor near final on bottom of circuit w/ capacitor on top spkr side(i call it top its on spkr side bottom when radio is upright (super mod kit). Or replace jumper J1 to factory deadkey of 4 watts and see no swing in talk except to 4.5 watt slightly(factory tune)

Jul 22, 2013 | Uniden Radio Communications

3 Answers

Red lights come on tx n rx and antenna come on when I key up the cb radio and the swr meter doesn't move


if a mod has been done to the cobra 29 (all 29,s)the light will come on just find vr6 audio the radio as it comes on adjust vr6 untill it goes away,,,,always trust your watt meter(s.w.r scale)over the flashing light its really easy to do it beats paying a shop $10-$15

Jan 13, 2013 | Cobra 29 LTD CB Radio

1 Answer

I can only hear the others. When I talk they can't hear and my red anntenna keeps coming on when I push button to talk.


Assuming the antenna is mounted and grounded correctly,when you try to transmit/talk does your meter needle move to the right with your voice,if it doesn't make sure meter knob is set to receive/transmit or mod[modulate] does it move to right now,if not make sure the mic gain knob is turned up or if it is a power mic,is it turned up&have a fresh battery.The antenna light could mean high swr readings which you will have to adjust by tuning the antenna with the radio meter or external meter,you can search swr adjustment on your computer if unfamiliar..some antenna warning lights are factory set too sensitive but most times are telling you there is a problem.If all is set&tuned properly and you still can't get a local signal to respond, your radios transmit finals could be blown,which you'll need a qualified radio tech to determine..Good luck& 73's

Aug 13, 2011 | Cobra 29 LTD CB Radio

1 Answer

Have a 99v was talking one nite talking great turn it off then back on no modulation check and change mics.still no mod.what should i look for ?


Check the mic gain.
Make sure it is not in PA mode.
Make sure the mic jack in the radio doesn't have a broke or loose wire.

Those are a few things I can think of based on the information given. More information is needed if these will no solve the problem.

Does it turn on?
Does it key up?
If it keys up is there carrier?
How many watts is the carrier?
Are there any mods done to the radio?
Does it have a roger beep installed? What kind?
Does it have an echo board install? What kind?
Did you do the mod or some one else?
What is your SWR?
Is the display flashing when you key it?
Are the displays lit at all?
Did you disconnect the power cord after you turned it off, and reconnect it?
What channel are you keying up on.
Was/is the case off the radio when you tried it or were you working on it at the time of the failure?
What mics have you tried.
are you using talk back?
did you some one on another radio tell you they do not hear you, or are you going by no swing on the meter in the radio?
Could the meter be bad?

Jul 31, 2011 | Galaxy Radios DX-99V 40-Channels Base CB...

1 Answer

Extndedmods done not problem tansmiting in am radio go back to 10 meter or they do not here my voice clear or a load nois lake a long roger bit or does not trasmit ad all i have to reset again no...


make sure NO ONE clipped your modulation limiter!!!! the Magnums are way over modulated of a radio. any mods will cause trouble. you are probably getting a feedback making it sound like a roger beep.. also it will depend on your SWR's make sure they are good on the band that you are talking on. ie.. no antenna on the market can work 10-12meters except maybe the 108"whips $17.99 and the predator 10k.... so be sure to check the swr's on ever channel that you would operate on. like ch 19 and 28.xxx and be sure first. high swr's will cause feedback on any radio.

Feb 23, 2011 | Magnum OmegaForce S45 CB Radio

1 Answer

Hello, i was given a cobra 25ltd classic to look at.. put it on freek counter keys up around 24,25 mhz with the last few numbers flutering around it will not stay still. when modgulated into it goes down...


Does it seem to be talking on the right channel??

Check to see if D10, which is supposed to be an N1004 diode, and see if it's been replaced with a jumper.

If that's the case, then the final is volted. This mod gains some wattage but can make a radio dirty. Putting an N1004 back in may fix the issue.

However...

Usually the radio will deadkey on the right freq.

The VCO could be off, and the radio may need to be aligned. Could the person you got the radio from have randomly turned VR's in the radio trying to mod it?

Without an ocilliscope you cannpt fully align the radio, but if you have a volt meter and a watt meter, you can do some of the alignment.

here is an alignment guide.

But if you can hear people on the correct channel, and they can hear you fine, it could be just a volted final.

Nov 07, 2010 | Cobra 25 LTD 40-Channels Base CB Radio

2 Answers

I also have another cobra 29 ltd classic and it works fine but i cant talk or hear what other factory cb's can hear, it is supposed to be tuned and peaked and i have a wilson 2,000 antenna, and i cant talk...


nearly all problems are caused by poorly tuned or untuned antennas. a good antenna system with a cheap stock radio will out perform a great tuned radio with a bad antenna system any day of the week. if you dont believe me, check the firestik antenna website's tech notes. or wilson's tech notes.

Sep 23, 2009 | Cobra 29 LTD CB Radio

2 Answers

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.

Apr 22, 2009 | Cobra 29 LTD CB Radio

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