Question about Galaxy Radios DX-959 40-Channels Base CB Radio

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10 kc drop at key up no transmit

RECEICE WORKS FINE ALL SWITCHES SEEM TO BE WORKING PROPERLY, BUT WHEN I KEY UP THE MIC IT DROPS 10 KC WITH NO OUTPUT POWER I CAN SEE MODULATION ON THE METER IN THE RADIO BUT NO OUTPUT POWER ON MY WATT METER AND THE TRANSMIT INDICATOR DOES NOT COME ON. I CHANGED Q51 AND Q53 AND STILL SAME PROBLEM. THANKS FOR ANY HELP ON THIS.

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  • jolynz Feb 21, 2009

    THANKS, FOR YOUR HELP, BUT I HAVE ALREADY THAKEN IT TO THE SHOP AND IT WAS A RESISTER TO THE LEFT OF THE MIC, JACK. AT THIS TIME I DON'T REMEMBER THE LETTERING COMBO BUT IT WAS A LONG SKINNY ON THE CORNER OF THE BOARD ON THE RIGHT SIDE. NOW THE RADIO WORKS GREAT.

    THANKS AGAIN

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Have you changed the voltage regulaor, or check it first 2 outside legs should red your 13 volt middle around 9

Posted on Nov 21, 2009

  • ePowerAmps CB Radios
    ePowerAmps CB Radios Apr 25, 2011

    I would be nice to know how the issue was resolved. I have the identical problem. I'm not sure which part needed replacing.

  • ePowerAmps CB Radios
    ePowerAmps CB Radios Apr 25, 2011

    Oh well. I just passed it onto a local cb guy. Hopefully, he'll figure it out and I'll post the results here.

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2 Answers

Why is humming coming from speaker when mic is keyed?


this is strange as most times if a proper transmit key is depressed , then the radio switches from receive to transmit , the mfg know this would cause some great squeal from receiver /transmitting so close to a receiver so the part that is the receiver is muted to keep this from happening , id say there is some fault in the part that does this muting of receiver

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Uniden PRO510XL low output and "motorboating"


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It sounds like your circuit board may have a bad solder joint. Sometimes during manufacture of the ciruit board, the joint could not be perfectly made. This will limit conduction and create heat which will worsen the effect over time. If you are familiar with opening and working with electronics then I suggest you remove the circuit board and inspect it for cold solder joints. When you find one, you can use a Cigar Torch type lighter to help reflow the solder easily. Out side of that, you mayu want to send it to a Electronics repair shop to do this for you. Let me know more and I will help. Good luck

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1 Answer

I purchased an old Realistic TRC-431 CB. When I turned it on it worked fine, the mic was keyed then the lights went dim and stayed dim. Now the lights remain dim. I checked the two output transistors...


The problem is with your power supply. There should be a big round transister on the power supply this is the power transister. It will be mounted to the power supply case. Replace this transister and try to operaste your radio again. Make sure that the power supply you use is at leat 7 amps or the radio will not operate properly and you will possibly blow the transister again.

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I have a cobra power mic that has no audio output


Sounds like its not wired up right, the audio wire must be off,take the plug apart and check the white wire, re-solder it. here is the wiring, pin1-shield,pin-2audio-(white), pin3-transmit-(red), pin4-receive-(black).....hope this was helpful...

Apr 23, 2010 | Cobra 29 LTD CB Radio

1 Answer

It comes on but not receiving


One of 2 reasons. First is common. Your mic or mic jack may be bad. The way the radio works, is the mic switch switched from receive and transmit. When the mic is not keyed then the switch is actually on receive, and when you key it, you switch it to transmit. So if there is something wrong with your mic, or it is not plugged in, the radio will not be in receive mode.

The next problem if a new mic doesn't solve the problem is...

there is an issue with your antenna or feed system. Make sure coax is good. Use an ohm tester. Make sure its not shorted.

Next make sure the antenna is good and tuned properly.

You may need to replace one or both.

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2 Answers

Cb is Keying Down instead of keying up when trying to talk


if you are transmitting fine Don't worry about the meter. Get an external SWR meter, they are better anyway.

Also, make sure the the switch next to the meter is all the way up on s/rf setting. thats for signal power and receive strength.

Aug 30, 2009 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

Have new dx959 doesnt get out very far talking 100yrds or so use rdking 56 mic mic works fine on old radio pc 78 and gets out fine also are 959 radios ok or junk has good reception


The DX959 has an output power setting knob. It's located next to the channel selector and is labeled RF Power. Turned counterclockwise will reduce output power. Turned clockwise will increase output power. Your switch is probably turned all the way counterclockwise resulting in low transmit volume.
Also, make sure the wiring for the RK59 is correct for the Galaxy. Even though it's a 4 pin plug, the pinouts may be different for the Uniden and Galaxy radios. Do a Google search for mic pinouts for your two radios to check.

Jul 12, 2009 | Galaxy Radios DX-959 40-Channels Base CB...

5 Answers

Magnum 257 No Audio Being Transmitted


Hello.I have a similar situation on a Magnum 257 HP operating on SSB (AM and FM works fine). If i Transmit it works fine, but when i release the Mic button (after TX), in the bottom side were the RX level should be, it appear somth like a signal level 3 to 5 (constant and continous), but i can't get any reception at all. Only if i turn the TX power level to MAXand i transmit, then it goes back to reception, but not every time. Somtime after TX i need to push the mic button 2-3 times to make it recive somthing, but this wors only if the power level is over 60-70% an i repeat, only on SSB.Can i get some help with this issue?

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1 Answer

Keys up and everything dims and does not transmit.


Moving the volume/on/off knob to make the radio work again is interesting and a good clue. On most CB's, the pot is probably soldered directly to the printed ciruit board.

It's possible that there is a bad solder joint to the power connections on the pot that turn the radio on & off. If the solder joint is bad, it can still make a connection but the connection will have added resistance in line. The on/off switch can be bad too.
Switches arc each time they are used and over time, the contacts become pitted and make poor connection.

I had a stereo receiver where the tuner lights flickered and there was electrical noise in the receiver. It turned out to be a bad on/off switch.

This resistance may be low enough not to affect the radio when in the receive mode but when you transmit and draw more current that resistance will be noticable during transmit.

The fact that you rotate or move the volume/on/off knob and the radio starts working again, tells me that there may be a bad connection in the radio.

A cheap thing you can try is spraying some electrical contact cleaner into the pot and rotate the pot back & forth several times and turn the switch on & off several times to clean it.

Please let me know if I can be of further assistance to you.

Good luck!

- Jim

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