Question about Uniden PRO510XL 40-Channels Base CB Radio

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My uniden pro510xl when hooking it up imediately blows the fuse like a dead short but if i hook up another radio it will work fine

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The radio was probably wired backwards at some point. There is a reverse polarity diode inside that must be replaced to fix this. If you have continued replacing fuses and plugging it back in, there may be further damage such as finals or audio amplifier chip as well. you will need to take the radio to a qualified repairman for service. If it is simply the reverse polarity diode, your bill should not be more than an hour's labor charge.

Posted on Feb 12, 2010

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I have the Uniden PRO 510xl has been working good for over a year but after setting for the winter when I ask if "anyone has a copy on this radio" I hear a response but can not understand even after adjusting the squelch at different settings and the S/RF is peaked.
HELP

Posted on Jun 01, 2011

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Best regards.


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1 Answer

1987 uniden pro 510 xl


Wow, from what you are saying, you should not be messing with the insides of the radio. Finals, are not resistors, that are TRANSISTORS, and they do not have resistance values at all.

The final is the little black transistor attached to the heat sink at the back of the radio. You can't just change the final. there are other parts that need to be changed if you want to do a high power mod. Don't even mess with it. you don't need too.

Next, D14 is not the uniden model. thats what you mess with in a cobra. Don't cut d14 in that radio or you will prolly blow it up. The diode you want to cut out is D203. DON'T CUT IT!!, Just un solder one leg of the diode. You won't be over modulated. That will bring you modulation up and your peak watts. it will swing to maybe 15-20 watts peak. That alone with make the radio louder.

You really don't need to raise the dead key. With a lower dead key you have higher swing. Its all about the audio. 2 watts for dead key is fine. Thats what I run.

You cannot do any other peaking with out a meter. If you have a meter you can spread the 2 coils behind the large transformer a tiny bit until you have peak wattage. L201 and L202. but from reading what you said, you should probably leave them alone, you will gain only a watt or 2, and its not worth it if you mess it up.

To be honest with you, all you really need to do is unsolder one leg of D203. Make sure you pull the leg out, and make sure it is not touching anything so it will not short.

Now if you do this, and it splatters, you can always solder it back in, and then turn RT201 all the way to the right, I think. If you turn it all the way to the right, and there is not modulation, you just turn it all the way to the left.

Please don't mess with anything else or you will screw the radio up.

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